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Equus 3721 Battery and Charging System Monitor | 
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| Brand: Equus
Category: Automotive Parts And Accessories
List Price: $25.57
Buy New: $12.95
You Save: $12.62 (49%)
New (3) from $12.95
Rating:  19 reviews
Sales Rank: 139
Media: Misc.
Shipping Weight (lbs): 1
Dimensions (in): 10 x 1 x 6.5
MPN: 3721
Model: 3721
UPC: 042173037216
EAN: 0042173037216
ASIN: B000EVWDU0
Availability: Usually ships in 1-2 business days
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| Features:
| • | Displays the condition of the battery and charging system | | • | Designed for 12-volt negative ground systems | | • | Protects the engine computer and 12-volt accessories from surges | | • | Easily plugs into a cigarette lighter or power receptacle | | • | Head pivots for easy viewing and angle adjustment |
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| Editorial Reviews:
Product Description
- Easily plugs into vehicles cigarette lighter or power receptacle to monitor battery and charging system voltage - Designed for 12-volt negative ground systems - LCD displays measured voltage with a bar graph to indicate battery charge level - Color-coded LEDs quickly identify batterys charge status - Head pivots for easy viewing angle adjustment
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| Customer Reviews: Read 14 more reviews...
 Great value, good product July 31, 2007
10 out of 10 found this review helpful
The picture on Amazon site is not correct. This battery monitor shows the voltage value with .01 precision (or two digits after decimal point). That is far more then enought to tell the battery status. I put it in the car, it automatically switches between "battery status monitoring" and "charging status monitoring". When the engine is stopped, it is in "battery status monitoring mode", when engine is running, it will be in "charging status monitoring" mode. Amazon's price is even bettern then Walmart. Definitely a great value buy. Will recommend this item to my friends.
Does the job February 20, 2008
5 out of 5 found this review helpful
just got the monitor from amazon based on the reviews here. the actual device is slightly different from it looks in the picture, with rounder edges. i guess the new product has been revised. also the protective plastic film is extremeply easy to peel off, a bit too easy i would say. or it might have something to do with the weather. here in singapore it's 30C all the time. the device has good build quality. the monitor can show two different tiny icons above voltage reading, under the battery and charging modes. the LCD is clear with bright blue backlight. basically it doesnt cost arm or leg but does all i expected. i will leave it plug in all the time in my car. i am sure i will be alerted by the unusual low voltage one day to realise the time to replace my battery. that will be the time i can recover the cost of this product by saving the expensive recovery service.
Battery monitor August 25, 2007
3 out of 3 found this review helpful
Very useful device to monitor voltage and charging. I like it. The plastic overlay was difficult to remove. I just wished I had one before my alternator died on me. I could have had the alternator DXed before it went dead by having a voltage gauge or monitor.
Great value April 5, 2008
3 out of 3 found this review helpful
This little device is a great value and time saver. Just plug it in and tell instantly if your battery and charging system are operating properly. No more playing around under the hood with your multi-meter. I have several items from Equus and I'm a fan of the company. They produce quality products that work great.
good product April 11, 2008
3 out of 3 found this review helpful
this product does exactly what I wanted. It is cheap, handy and does not require a technician to install- just plug it into your cigarette lighter.
I had alternator and battery problems in the past so I always want to know what is happening with these 2 areas.
I can reccommend this product to anyone whose vehicle does not have a built in voltmeter
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