E T X S E R I E S L I T H I U M B A T T E R I E S
16
Charging
Failure to follow these instructions may result in damage to the battery!
The ETX Lithium battery is shipped fully charged if ordered directly from EarthX, so try to
start the vehicle without charging. If ordering from an authorized dealer, it is recommended
you check the voltage first and if it is above 13.3V, continue to install and start vehicle. If at
any time the vehicle will not start or the battery seems low, charge it for the recommended
time and charge rates shown below and disconnect the charger when charging is complete.
The recommended charge rates are detailed in the specification section above. The
maximum charge rate in the specification section is related to the vehicle charging system.
Never exceed the maximum charging amps for your battery.
This table shows typical charging times for the different ETX series batteries:
Model
Charging Amps
Charging Time
ETX6
1 amp
3 hour
2 amp
1.5 hour
3 amp
45 min.
ETX12
1 amp
4 hour
3 amp
1.5 hour
5 amp
45 min.
ETX18
1 amp
6 hour
5 amp
1.2 hour
8 amp
45 min.
ETX24
1 amp
8 hour
5 amp
1.5 hour
10 amp
45 min.
ETX36/
ETX680
ETX680C
1 amp
12 hour
5 amp
2.5 hour
15 amp
45 min.
ETX900
1 amp
16 hour
5 amp
3 hour
20 amp
45 min.
ETX48/
ETX1200
1 amp
24 hour
5 amp
5 hour
30 amp
45 min.
Lithium batteries have a very low self-discharge rate which means the battery, if
disconnected from your vehicle, could “hold its charge” for a year. That said, modern
vehicles like touring style motorcycles use power from the battery even with the key in the
off position. In those cases we recommend disconnecting a battery cable from the battery
during long term storage (greater than 2 months) or using a charger.
