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Comment: Minor cosmetic imperfection on top, front or sides of item. Item will come in original packaging. Packaging will be damaged.

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Innova 3721 Battery and Charging System Monitor

4.3 out of 5 stars 1,395 customer reviews

Was: $15.69
Price: $13.99 Free Shipping for Prime Members
FREE Shipping
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Free 5-8 business-day shipping within the U.S. when you order $25 of eligible items sold or fulfilled by Amazon.
Or get 4-5 business-day shipping on this item for $5.99. (Prices may vary for AK and HI.)
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You Save: $1.70 (11%)
Original Version
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  • 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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Frequently bought together

  • Innova 3721 Battery and Charging System Monitor
  • +
  • Safe Smart Quick Car Charger,5V/3.6A Dual USB Port Car Charger Adapter with LED/ LCD Display Battery Low Voltage Warning Volt Meter Car Battery Monitor (Black)
Total price: $26.98
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Color: Original Version
  • Buy Used and Save: Buy a Used "Innova 3721 Battery and Charging System Monitor" and save 64% off the $27.76 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

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From the manufacturer

Product description

Color:Original Version

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 information

Color:Original Version

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April 13, 2018
Color: Original Version|Verified Purchase
18 people found this helpful
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November 29, 2014
Color: Original Version|Verified Purchase
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38 people found this helpful
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May 12, 2017
Color: Original Version|Verified Purchase
8 people found this helpful
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Innova 3721 Battery and Charging System Monitor
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This item: Innova 3721 Battery and Charging System Monitor