User Manual

ETX SERIES LITHIUM BATTERIES

and protects the charger against reverse polarity hookup. Some chargers need to ‘see’ as

much as 9.5 volts before they recognize that they are attached to a battery. Once the charger

is hooked up, it’s output voltage should increase, up to 14.6 volts. If your charger does not

do this, you may want to contact the charger manufacturer for further troubleshooting tips.

Problem

How do I know if my vehicle charging system is working?

Possible Causes and Solutions

Connect a voltmeter to the battery. Measure the voltage before the vehicle is started (should

be approximately 13.1- 13.6V. Start the vehicle and run the engine at 3000 – 4000 RPM for

one minute. The voltage should increase after the vehicle is started, to approximately 13.9 -

14.6 volts. If your charging system does not output a voltage higher than the battery (when

the vehicle is stopped), there may be a problem with the charging system.

Problem

The battery gets hot when discharging or charging.

Possible Causes and Solutions

Lithium batteries can “heat up” when subjected to high amperage discharging and charging.

If your battery feels hot during use, stop using it (charging or dis-charging it) and let it cool

down. If this continues it is an indication of a serious problem and the battery needs to be

replaced.