Maintains your battery automatically for months

All major battery manufacturers recommend maintaining starter batteries FULLY CHARGED during periods of non-use. Maintenance charging at the correct voltage is also very important. Sealed batteries should be maintained at 13,5 to 13,7V. A charger supplying a lower maintenance voltage may allow a sealed battery to discharge to a level that does not allow successful starting of the motor. Other than forgetting the ignition or lights on, a vehicle alarm, aged wiring or even the battery itself (as the battery ages it will self discharge quicker) are the main causes of current drain.
OptiMate 3 provides a maintenance voltage of 13,6V which is applied for 30 minutes out of every hour. During the remaining 30 minutes the battery voltage is monitored. This 50% duty cycle maintenance mode is also designed to allow filler cap batteries to be safely maintained without loss of electrolyte.

OptiMate III / 3 is totally safe for season-long connection to irregularly or seasonally used batteries while still connected to the vehicle. The sophisticated charging algorithm ensures no risk of over-charging.


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