This instrument accurately measures the voltage of the12 volt 8 amp hour AGM and 12 volt 12 ah lithium ion M4 batteries. A voltmeter is an indispensable tool for understanding battery condition. We have priced this voltmeter to encourage as many M4 owners as possible to own and use.
12.3-14 volts means the battery is in good shape. Voltage less than 12.3 means the battery needs to be replaced. 12.85 (or higher) volts indicates a fully charged battery.
Lithium Ion Battery
11.3-12 volts means the battery is in good shape. Voltage less than 11 volts means the battery needs to be replaced. 12.0 volts (or higher) indicates a fully charged battery