WARNING

This product can expose you to chemicals including DiNP, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov

Battery MonitorPart#3721

The Innova 3721 Battery and Charging System Monitor is designed to give you peace of mind while driving your vehicle. Easily see when there is an issue with your vehicle’s charging system.

MSRP $17.99

Battery Monitor Part#3721

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Tool Reviews

My Battery Monitor does not come on when connected to the cigarette lighter or power receptacle?

If the Battery Monitor does not turn on or display any readings, check the vehicle for blown fuses such as a cigarette lighter, or accessories fuses.

Will the Battery Monitor help start a dead or weak battery?

No. The battery monitor will only read the voltage present from the battery and/or the charging system.

What is the warranty period?

The Manufacturer warrants to the original purchaser that this unit is free of defects in materials and workmanship under normal use and maintenance for a period of one (1) year from the date of original purchase. If the unit fails within the one (1) year period, it will be repaired or replaced at the manufacturer's discretion.

Would this tester tell me if I have a voltage drain?

No. The battery monitor will only read voltage present from the battery and/or the charging system.

There is no item to display.

There are no "Available Upgrades" available.
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FEATURES 3020 3030 3040 3100 3120 3130 3140 3150 3160
CEL - Diagnose + Clear - 1996 + Diesel + Hybrid
ABS - Diagnose + Clear
Vehicle Health - Confirms State Emissions Test
Emissions Readiness Advisor
RepairSolutions®  
Definitions in English | Spanish | French  
Internet Updatable & Upgradable  
Battery Backup      
AirBag - Expanded Asian & European Coverage              
FixAssist                
View Live Data          
OBD1         Optional Optional Optional

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