Digital Voltmeter $3.99
This instrument accurately measures the voltage of the12 volt 8 amp hour AGM M4 battery. 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. A voltmeter is an indispensible tool for understanding battery condition. We have priced this voltmeter to encourage as many M4 owners as possible to own and use.