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Car battery gauges - Gauges




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Car battery gauges - Bookshelf


290 pages

Popular Science

1946-03

Automotive-type ammeters usually consist of a permanent magnet, a needle attached to a pivoted soft-iron vane, and a Gauge Drawings by STEWART ROUSE. FUOA- DASHBOARD UNIT __ BATTERY Oix IGNITION -=• IGNITiOl SWITCH BALANCING-COiL TYPE ...

About this book
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.



242 pages

Popular Science

1941-05

A screw driver is the only tool needed to install the adjustable spokes on the old steering-wheel spokes Magnetic Gauge Measures Thickness of Car Enamel ENAMEL thickness — an important criterion of its durability — is measured quickly ...

About this book
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.



288 pages

The Outboard Boater's Handbook, Advanced Seamanship and Practical Skills

Creator: David R. Getchell | 1994-01-01

Batteries for electric motors are a different breed from those used in cars. While a car battery will not damage an electric outboard, ... You can also buy battery gauges that will tell you how much charge is left in your battery.

Publisher: International Marine/Ragged Mountain Press

About this book
This comprehensive manual shows you how to go places and do things you never thought possible in a small outboard motorboat. A well-designed ruggedly built 17-footer, for instance, can fish offshore, circumnavigate Lake Superior, and crisscross the continent on inland waterways or on a trailer pulled by the family car. Small outboards are among the most versatile boats ever developed and are far more able than you might expect. Covered here are all the popular types--and some exciting alternatives as well as methods that may change your entire boating outlook.Aided by contributions from other experts, veteran outboard skipper David R. Getchell, Sr., offers a wealth of useful facts and special savvy that reveal for the first time in a single book the true potential of these democratic boats 20 feet and under. Here are the means to understand what can be done, and the way to do it safely, including: how to judge a boat's potential and capabilities based on design and construction; how to rebuild an older boat; how to handle a little boat in big seas, surf, or shallow water; how to navigate; how to read the weather; how to head upriver or offshore; how to trailer your boat; how to manage and equip it for camp cruising on a nearby lake or for subarctic exploration; and how to care for the boat and motor.


Gauges Directory

Car Battery Terminal 0 Gauge | eBay
Find great deals on eBay for Car Battery Terminal 0 Gauge in Vehicle Battery Connectors and Terminals. Shop with confidence.

How to Read a Car Battery Gauge | eHow
How to Read a Car Battery Gauge. Most drivers can read and understand most of the gauges on the dashboard of their vehicles. The fuel and temperature gauges, as well ...

Coleman Cable 08660 Heavy-Duty 4-Gauge Auto Battery ...
Amazon.com: Coleman Cable 08660 Heavy-Duty 4-Gauge Auto Battery Booster Cables with Polar Glo-Watt Clamps (20 Feet): Automotive

battery gauge | eBay - Electronics, Cars, Fashion ...
Find great deals on eBay for battery gauge and 12v battery indicator. Shop with confidence.

Top Car battery Reviews | Best Car battery – Consumer ...
Looking for the Best car battery? Consumer Reports has honest Ratings and Reviews on car batteries from the unbiased experts you can trust.


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Editor's picks

  • INNOVA

    INNOVA 3721 Battery and Charging System Monitor

    Automotive Parts and Accessories (INNOVA)

    Rating (457 reviews):
    (4.6/5)
    INNOVA

    Great value, good product

    0 5/5 H. Wang "jwangamazon" (San Jose, CA) - See all my reviews, July 31, 2007

    12 Volt battery Monitor

    Seemingly just another auto gadget fortunately the Equus 3721 is more sophisticated than its ponderous description. A breeze to connect to any car's 12 Volt electrical system. Simply push into the lighter socket or an auxiliary power outlet now found in many newer vehicles. With the engine running the instrument constantly displays battery condition with an LED light; amber when marginal, red if the battery is discharging. A green light indicates a correctly functioning electrical system. All is well with both battery and, most importantly, the alternator. The Equus is also an accurate voltmeter. Digital read-outs give exact voltage in the electrical system. Potential alternator problems or a failing battery will be indicated by below normal voltages, plus an amber or red light. Extra information is a battery icon graphically showing total battery charge. Tending towards erratic read-outs, and therefore unreliability, it is not the unit's best feature... 4/5 J. B. Syrett "Barry Syrett" (Gig Harbor, WA USA) - See all my reviews, April 16, 2008

    VERY GOOD FOR SUCH A LOW PRICE

    The Honda 2005 civic has a marginal charging system. This meter is ideal for determining when it is time to turn off the radio to reduce load on the alternator. Voltage reading is very accurate, much better than 1% as measured against a small Beckman pocket meter, which in turn has been checked against a Powerex Wizard aa cell charger. Warning lights function well.Some things to note when using this tester: Standard voltage of a 12 volt battery is 12.6 volts. Some deep cycle absorbed glass mat batteries will read 12.8. This is after loading the battery by turning on the headlights for 10 seconds, to remove surface charge. Note that while the lights are on, the voltage drops quickly at first, then the voltage stabilizes. Turning off the lights causes the voltage to rise again gradually. After a few minutes the voltage will stop rising. If the voltage settles at 12.6 (or 12.8 for AGM battery) battery is charged, assuming that the battery is near 68 degrees F. Lower... 5/5 Jesse Knight (woburn ma usa) - See all my reviews, November 10, 2010
    List Price: $25.57
    Price: $13.95
    You Save: $11.62 (45%)
    Designed for 12-volt negative ground systems
    Head pivots for easy viewing and angle adjustment
    Easily plugs into vehicle's cigarette lighter or power receptacle to monitor battery and charging system voltage
    LCD displays measured voltage with a bar graph to indicate battery charge level
    Color-coded LEDs quickly identify battery's charge status


  • Digital Readout Volts

    DROK 0.56" Green LED DC 12V Auto Gauge Small Voltmeter Digital Car Battery Voltage Tester 3.50-30.0V Anti-reverse Protection

    Home Improvement (Digital Readout Volts)

    Rating (1 reviews):
    (5.0/5)
    Digital Readout Volts

    volt meter

    0 5/5 antwain - See all my reviews Amazon Verified Purchase(What's this?) This review is from: DROK 0.56" Green LED DC 12V Auto Gauge Small Voltmeter Digital Car Battery Voltage Tester 3.50-30.0V Anti-reverse Protection (Misc.) This volt meter came on time and was wrap perfectly.... I hooked this volt meter up to 2 12 volt batteries and the reading is perfect and is very bright great product 0 Help other customers find the most helpful reviews  Was this review helpful to you? , January 23, 2014
    Display mode: Three 0.56" Green LED digital tube
    Power supply: Don't need the power supply, direct use of the test voltage as a power supply
    Measurement accuracy: +/- (0.5% + 2 Digit)
    Measurement range: DC 3.50 - 30.0V
    Variable precision: 10V below , resolution of 0.01 V; 10V above,resolution of 0.1 V


  • AAA

    AAA 4326AAA Heavy Duty 16' 6 Gauge Booster Cable

    Automotive Parts and Accessories (AAA)

    Rating (133 reviews):
    (4.7/5)
    AAA

    Didn't Think Booster Cables Could Make Me Smile But...

    My car died the other day so I took out my handy-dandy booster cables and using my sister-in-law's car I gave myself a boost. Actually I TRIED to give myself a boost but they did not work. They had worked in the past but in this case my battery was totally drained (guess I left something running) and needed more juice than usual. So I sat and revved and sat and revved for 30 minutes trying to send enough juice from her car to mine but...nothing. I feared at this point that maybe it was something other than the battery but I figured, "let me get a decent pair of cables and try again. If not, I'll get a tow". I don't know what the gauge was on the cables I had but I'm sure they were crappy because they were "Made In China" and bought at a discount store for $15 or something like that. One other gripe is that they were super-short. My battery is in front of the driver's seat in the engine bay and my sister-in-law's is the same. But the stupid things would not reach from one battery to... 5/5 Big Al "bklyn_big_al" (Brooklyn, NY United States) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: AAA 4326AAA Heavy Duty 16' 6 Gauge Booster Cable (Automotive) My car died the other day so I took out my handy-dandy booster cables and using my sister-in-law's car I gave myself a boost. Actually I TRIED to give myself a boost but they did not work. They had worked in the past but in this case my battery was totally drained (guess I left something running) and needed more juice than usual. So I sat and revved and sat and revved for 30 minutes trying to send enough juice from her car to mine but...nothing. I feared at this point that maybe it was something other than the battery but I figured, "let me get a decent pair of cables and try again. If not, I'll get a tow". I don't know what the gauge was on the cables I had but I'm sure they were crappy because they were "Made In China" and bought at a discount store for $15 or something like that. One other gripe is that they were super-short. My battery is in front of the driver's seat in the engine bay and my sister-in-law's is the same. But the stupid things would not reach from one battery to... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , September 13, 2012

    Clamping makes a huge difference

    0 5/5 Handyman (working hard somewhere in California) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: AAA 4326AAA Heavy Duty 16' 6 Gauge Booster Cable (Automotive) I was about to buy the Cole's heavy duty booster cable until I read one of the reviewers mention that its clamping jaws do NOT close enough for use with smaller batteries (such as motorcycle batteries).So I bought this one from AAA instead. I am glad to say the clamps do close tightly (unlike the Cole's which leave a small gap in between). The quality is just as good as the other more expensive ones.Very satisfied with this AAA booster cable. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , June 23, 2011

    sturdy set

    0 5/5 Mark Twain (Buffalo) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: AAA 4326AAA Heavy Duty 16' 6 Gauge Booster Cable (Automotive) this is a nice set of cables. very bulky and quality construction. nice carry case too. i'm pretty sure this is the last set of these i will ever buy. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 24, 2011
    List Price: $29.99
    Fits top and side post battery terminals
    Cables are Heavy Duty which delivers 100 percent more power than light duty cables
    400-Ampere color coded clamps
    Cables are extra long at 16-foot
    Quality rubber insulation


  • RAD Cycle Products

    12 VOLT ELECTRIC AIR PUMP w/GAUGE for Tires Bikes Cars Air Matresses

    Sports (RAD Cycle Products)

    Rating (218 reviews):
    (3.6/5)
    RAD Cycle Products

    My research paid off -- this is great!

    My chrome wheels have begun to deteriorate: there's pitting/corrosion where the tire bead is, a common problem (I only recently learned) for those of us who live in places where roads must be heavily salted in the wintertime. So, the tires lose air annoyingly quickly. Because I'm not yet ready to purchase a new car & didn't want to spend $600+ on a new set of alloy wheels for my aging vehicle, a 12-volt compressor pump seemed like a good solution.Thanks to all the reviews -- good and bad -- found here on Amazon for a number of 12-v compressors, I decided to purchase this one. And I'm glad I did. It's speedy and plenty powerful for my needs; quieter, with less vibration, than what I was expecting. Love the compact size, a built-in gauge that's larger than some, and the hard-sided carrying case. If you're a newbie to the routine of inflating your own tires, don't be intimidated: this compressor is a breeze to use, you can easily tell when the valve connector locks onto... 5/5 Portia - See all my reviews Amazon Verified Purchase(What's this?) This review is from: 12 VOLT ELECTRIC AIR PUMP w/GAUGE for Tires Bikes Cars Air Matresses (Sports) My chrome wheels have begun to deteriorate: there's pitting/corrosion where the tire bead is, a common problem (I only recently learned) for those of us who live in places where roads must be heavily salted in the wintertime. So, the tires lose air annoyingly quickly. Because I'm not yet ready to purchase a new car & didn't want to spend $600+ on a new set of alloy wheels for my aging vehicle, a 12-volt compressor pump seemed like a good solution.Thanks to all the reviews -- good and bad -- found here on Amazon for a number of 12-v compressors, I decided to purchase this one. And I'm glad I did. It's speedy and plenty powerful for my needs; quieter, with less vibration, than what I was expecting. Love the compact size, a built-in gauge that's larger than some, and the hard-sided carrying case. If you're a newbie to the routine of inflating your own tires, don't be intimidated: this compressor is a breeze to use, you can easily tell when the valve connector locks onto... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , September 8, 2010

    Not very impressed

    0 3/5 Y. Ho "Yifong" (Budd Lake, NJ United States) - See all my reviews, December 14, 2010

    low quality and dishonest business practices

    0 1/5 Robert LaFrance - See all my reviews Amazon Verified Purchase(What's this?) This review is from: 12 VOLT ELECTRIC AIR PUMP w/GAUGE for Tires Bikes Cars Air Matresses (Sports) I ordered this pump because of the great reviews. But when it came, I found the fittings to be poorly machined and it was slapped together with low-quality parts. The air pressure gauge is a joke.The icing on the cake was when I got an email from the seller promising me a FREE PUMP if I write a good review! Now I know where those good reviews came from! This form of bribery is certainly dishonest and probably illegal.Yeah, it pumps air. But so do a lot of other pumps that are cheaper and better quality. This is going straight to a garage sale and I'm buying a SLIME pump. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , November 4, 2012
    List Price: $79.95
    Inflates 1 tire in only 90 seconds
    Comes with air hose that is over 6 feet
    Waterproof motor
    Extra long 12 volt cigarette lighter adapter plug
    Accurate and highly visible gauge


  • Terk

    RCA AH16100SR 100 Ft. 16-Gauge Speaker Wire

    CE (Terk)

    Rating (0 reviews):
    (4.6/5)
    Terk

    14 AWG should satisfy majority of installs

    As stated, this is not pure copper...it is copper clad aluminum (CCA). Cost is less, but that's because aluminum is cheaper and more resistive than copper. I work as an engineer for a power company. Lower voltage distribution power lines used to often be made from pure copper - however it is more cost effective to use aluminum or aluminum alloys... but since the resistance is greater for these wires, the wire gauge is increased - so you need thicker wires to accomplish the same thing...however this is more cost effective. Same theory applies here...it's not pure copper, so ideally - you should use bigger wire than what your application would require if pure copper was used.General rule for 16 AWG wire is to keep runs at 48' or less. Most runs aren't that long, so 16 AWG will even satisfy most short wire installs... having said that, if you purchase the 14 AWG CCA wire - I'd imagine runs of wire up to 50' would be acceptable.Some reasons to shop around... 3/5 F. RADDATZ "RADDFM" (Chicago, IL) - See all my reviews, November 4, 2011

    good speaker cable

    0 5/5 Danny Creech "RetiredDan" (Ventura, CA United States) - See all my reviews, October 26, 2009

    Quality true 14 guage cable

    0 5/5 Don (South Carolina) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: Rca AH14100SR 14-Gauge Speaker Wire (100 feet) (Electronics) At time of purchase, was BEST price for true 14 gauge speaker wire (CAUTION: cheaper brands may be deceptive and count the wire coating with the wire as the guage size- VERY deceptive)PROS:- True 14 gauge (if you need this gauge for the length of your particular run)- Well marked polarity- No nonsense quality wire (read reviews about physics of electric current etc and realize the low oxygen, super shielded, etc are just that- hyped marketing. i.e. Wouldn't buy Monster wire or cables unless your friends check out your brands and measure the height of your ceilings on the second floor to make sure you didn't go cheap.)CONS:- As another reviewer noted could be marked every foot for measurement purposes (this was not important to me). 0 Help other customers find the most helpful reviews  Was this review helpful to you? , October 8, 2010
    List Price: $19.99
    16-gauge speaker wire
    CCA, 100 feet
    Connects speakers to AV receiver or amplifier
    100-foot length
    Connects speakers to A/V receiver to amplifier
    Plastic spool
    Connects speakers to you're A/V receiver or amplifier
    Spool provides easy and convenient installation
    16-Guage Speaker Wire 100 Feet


  • Digital Car Voltmeter

    DROK 2-wire Car 0.56" DC 3-30V 12/24V Green LED Small Digital Voltmeter Panel Volt Meter Voltage Gauge

    Home Improvement (Digital Car Voltmeter)

    Rating (18 reviews):
    (4.8/5)
    Digital Car Voltmeter

    great

    0 5/5 Kevin Rickert (Olympia) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: DROK 2-wire Car 0.56" DC 3-30V 12/24V Green LED Small Digital Voltmeter Panel Volt Meter Voltage Gauge (Misc.) Good quality panel mount display and very easy to wire/install. The Price was the best part since it is more then half the cost of other displays I looked at. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 15, 2014

    Perfect little Voltmeter!

    0 5/5 rbhatta "A Dinosaur you can trust!" (Sunnyvale, CA, USA) - See all my reviews, October 22, 2013

    Works good

    0 5/5 Dave Holfeltz - See all my reviews Amazon Verified Purchase(What's this?) This review is from: DROK 2-wire Car 0.56" DC 3-30V 12/24V Green LED Small Digital Voltmeter Panel Volt Meter Voltage Gauge (Misc.) I have had no problems with this meter, it is very clear and easy to read, I would order more when I need them. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , March 21, 2014
    Measure voltage: DC 3-30V (two wires Access)
    Display color: Green
    Operating temperature: -10°c to 65°c
    Measurement precision:0.01V(3-10V); 0.1V (10-30V)
    Display: Three 0.56" digital LED Tube


  • AAA

    AAA 42 Piece Emergency Road Assistance Kit

    Automotive Parts and Accessories (AAA)

    Rating (53 reviews):
    (4.4/5)
    AAA

    Great Roadside Kit

    0 5/5 KyleStyle (Snellville, Ga) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: AAA 42 Piece Emergency Road Assistance Kit (Automotive) Great kit! I purchased this when my wife ran her battery dead and didn't have any jumper cables, so I sent her this from amazon while I was still in Afghanistan.Everything in the kit comes as described. I can only vouch for the jumper cables, as they are the only thing I have had to use, but they are built enough to be decent jumper cables (unlike some very flimsy cheap ones you see in these kits).Great value for a roadside kit, everyone should have one in their vehicle!! 0 Help other customers find the most helpful reviews  Was this review helpful to you? , November 7, 2010

    Jumper Cables Too Short

    0 3/5 Sherry Caillier "Sherry" (Dallas, TX) - See all my reviews, November 3, 2013

    Quality Product

    0 4/5 Snaby (Glen Allen, Virginia) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: AAA 42 Piece Emergency Road Assistance Kit (Automotive) Very nice compact design, perfect for stowing away in the corner of the trunk. Nice sturdy canvas bag. Everything seems to be good quality, should come in handy in emergency situations. One star off for "old-school" flashlight, replaced with my own LED. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , July 23, 2010
    List Price: $25.99
    Price: $17.65
    You Save: $8.34 (32%)
    Keep in your car
    Most trusted name in travel
    Compact storage bag with handles
    Flashlight with batteries
    8 gauge heavy duty booster cable


  • Stens

    Stens 425-223 Battery Cable Assembly Replaces Club Car 7295 Cushman 835340 E-Z-Go 11888-G2 14610-G1

    Lawn & Patio (Stens)

    Rating (1 reviews):
    (5.0/5)
    Stens

    Stens Battery Cable

    0 5/5 Sky Watcher Sam "Sky Watcher" (Loganville, GA USA) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: Stens 425-223 Battery Cable Assembly Replaces Club Car 7295 Cushman 835340 E-Z-Go 11888-G2 14610-G1 (Lawn & Patio) Used this as an extension to existing battery cable. The cable is well made. It has standard sized connections on the ends. I have had no problems. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , January 18, 2014
    List Price: $13.99
    Price: $3.99
    You Save: $10.00 (71%)
    Length: 12-inch; studs: 5/16-inch, 3/8-inch
    Gauge: 6; 300 volt
    Color: red; poly-vinyl insulation is resistant to grease, oil and gasoline heavy-duty corrosion resistant terminals


  • Coleman Cable

    Coleman Cable 08660 Heavy-Duty 4-Gauge Auto Battery Booster Cables with Polar Glo-Watt Clamps (20 Feet)

    Automotive Parts and Accessories (Coleman Cable)

    Rating (149 reviews):
    (4.4/5)
    Coleman Cable

    Might as well get the long ones....

    0 5/5 Native Trekker (PA) - See all my reviews Amazon Verified Purchase(What's this?) This review is from: Coleman Cable 08660 Heavy-Duty 4-Gauge Auto Battery Booster Cables with Polar Glo-Watt Clamps (20 Feet) (Automotive) I purchased these cables based solely on internet research. Coleman seems to be a well respected company. After inspecting the 08660 twenty foot long four gauge cables, I am satisfied with my purchase. The materials appear to be of good quality, and the clamp design is intuitive. There is a top of page review dated September 14th 2006 by Privacy Advocate titled "Slight disappointment" in which he describes his concern about the clamps having only one side of the jaw plated with copper. This actually is an intelligent design. The copper cable is connected to only one jaw (the jaw that is copper plated for increased conductivity). Copper plating the non-connected jaw would be counter productive. I recommend purchasing a minimum length of twenty feet, a minimum of four gauge cable, and clamps rated a minimum of 500 amps. The length is recommended because you may not always be able to place a boost vehicle nose to nose or side by side. The gauge and amps are particularly important if you... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , November 1, 2002

    Quality cables

    I purchased these cables based solely on internet research. Coleman seems to be a well respected company. After inspecting the 08660 twenty foot long four gauge cables, I am satisfied with my purchase. The materials appear to be of good quality, and the clamp design is intuitive. There is a top of page review dated September 14th 2006 by Privacy Advocate titled "Slight disappointment" in which he describes his concern about the clamps having only one side of the jaw plated with copper. This actually is an intelligent design. The copper cable is connected to only one jaw (the jaw that is copper plated for increased conductivity). Copper plating the non-connected jaw would be counter productive. I recommend purchasing a minimum length of twenty feet, a minimum of four gauge cable, and clamps rated a minimum of 500 amps. The length is recommended because you may not always be able to place a boost vehicle nose to nose or side by side. The gauge and amps are particularly important if you... 5/5 T. Brown "TB" - See all my reviews, November 20, 2006

    Good Jumper Cables for the money, But.....

    For the price and in the right situations these are good cables. Good length, good ga. wire and copper connectors. But for me where they fall short is at the clamps and this type of clamp seems to be on MANY cables available today. I could not see it in the photos but the clamps are uneven at the ends because of the extra notch the manufacturer adds on one side to make it easier to connect to side terminal batteries. Also there are NO teeth on the end of the jaws so you HAVE to make your connection using the teeth on the sides of the jaws. This does not sound like a big deal until you are in a tight situation and have to clamp onto a top post battery straight down, then you have an uneven clamp end and no teeth to grip the post. I happen to also have a car (a domestic) with a remote mounted battery, not a HOT ROD or modified car, just a stock factory production car where the manufacturer could not fit the battery under the hood for space saving and design reasons and put it... 3/5 0, March 28, 2010
    List Price: $86.99
    Price: $42.57
    You Save: $44.42 (51%)
    Engineered for warm and cold climates
    Ergonomically designed handles
    Made in America
    Fits top and side post batteries
    Polar-Glo polarity labels glow in the dark


  • Roadpro

    RoadPro RPSL-681 12V Direct Hook-Up Ceramic Heater/Fan with Swivel Base

    Automotive Parts and Accessories (Roadpro)

    Rating (163 reviews):
    (2.7/5)
    Roadpro

    Your going to be sorry................

    Just installed one of these in my John Deere Tractor cab, and am pretty disapointed. I have seen these advertised as both 300 Watts and now Amazon is listing them as only 180 watts???? So am not sure if there is two models of this or not??? I bought it because of the review on here from the guy with the skid steer praising it??? I found mine will take 20 mins to defrost[about a foot square hole NOT the whole thing] the windshield if its ZERO degrees here in Northern Maine. I dont really know what it would be good for???? I would say it would be something that would heat up an area maybe 18"X18" square not the cab of a tractor, that is more like 4ft square. If you think it will heat up a vehicle anything like the vehicle heater, you are going to be very disapointed. As it's output is about 1/10th of that.............. I would not have bought it if I could have pluged one in before I bought!!! Maybe a better way of rating it is that a standard hairdryer[1500wt] will put out atleast... 1/5 Earle Bubar (Northern Maine) - See all my reviews, February 17, 2009

    Stay away from this heater

    0 1/5 Brandon A. Goldberg (Fenton, MI USA) - See all my reviews, February 6, 2009

    12-Volt Ceramic Heater/Fan with Swivel Base

    0 4/5 Robert Swensen - See all my reviews, October 25, 2007
    Switch from heat to cool settings
    Direct hook up to your vehicle battery
    15 Amp rating
    12 Gauge 14-Feet power cord
    Includes all installation hardware