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Nowadays INNOVA 3721 Battery and Charging System Monitor is one of the best buys products in US This product quality is also excellent. Many Reviews has proven that this item has good quality, so most of the buyers are satisfied. You can see it from the customers opinions who have given positive responses. if you are interested in this best buy on sale, you should order soon to avoid disappointment, because this item tends to sold out quickly.
Product Description
The INNOVA Battery and Charging System Monitor displays the condition of your battery and charging system instantly. It protects the engine computer and 12-volt accessories from damaging surges when jump starting or recharging. Easily plugs into the vehicle's cigarette lighter or power receptacle to monitor battery and charging system voltage. The LCD screen displays the measured voltage with a bar graph to indicate battery charge level and the color-coded LEDs quickly identify the battery's charge status. The head pivots for easy viewing and angle adjustment.
Product Details
- Amazon Sales Rank: #133 in Automotive
- Brand: Innova
- Model: 3721
- Number of items: 1
- Dimensions: 6.50" h x
1.00" w x
10.00" l,
1.00 pounds
Features
- Easily plugs into vehicle's 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 battery's charge status
- Head pivots for easy viewing and angle adjustment
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INNOVA 3721 Battery and Charging System Monitor Innova Video
Customer Reviews
Most helpful customer reviews
124 of 128 people found the following review helpful.
By H. Wang
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.
--- Update ---
Amazon has updated the new photo for the product. The picture is correct now.
97 of 103 people found the following review helpful.
By J. B. Syrett
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.
Equus's instruction card is easy to understand. The unit is well made, sturdy, easy to connect and to transfer to any 12 volt system not having its own voltmeter. Also, as a supplemental monitor in an RV, or a bigger boat with a remote 12 Volt outlet in a sleeping area far from the main instrument panel, overall battery condition condition can be monitored while camping or at anchor.
Good value for money; very useful. From personal use, recommended.
50 of 53 people found the following review helpful.
By Jesse Knight
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 temps raise the voltage, higher temps lower the voltage. For a standard battery figure about 12.66 volts at 32 F and 12.54 volts at 104 F battery temperature, not air temperature.
After a car has been running for awhile with no lights, radio, wipers, AC, heat or window defroster, the alternator may cycle letting the battery voltage drop for a while before kicking in. This is OK provided the charging is steady shortly after turning on the lights. An intermittant alternator will cause the red light to turn on and off when headlights are on.
The bar graph for battery condition is not very useful as the meter has only voltage information.
The instructions do not state that this tester is for negative ground cars only, a small quibble as positive ground is not common.
Had I bought this device six months ago I could have avoided killing a brand new battery in six months.
UPDATE: Still working fine as of May 21, 2013
See all 425 customer reviews...
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Product INNOVA 3721 Battery and Charging System Monitor prices and availability are accurate as of the date/ time indicated and are subject to change. Any price and availability information displayed on [Amazön.com] at the time of purchase will apply to the purchase of this product.
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