2007 Highlander Hybrid 12V battery - how to keep it charged when not driving for a while?

Dave Pompea

Other than either pulling the 12V battery cable off or putting on a trickle charger, I need to keep the 12V battery from going flat when I don't drive for 3+ weeks.

How can I force the ICE to actually run and recharge the 12V battery every week or so, parked and not in gear?

0patience

Not really anything I would recommend.
Some of our emergency vehicles have auto starts, so if the battery voltage drops, it starts the vehicle to maintain the battery charge, but the vehicle isn't unattended.

A trickle charger would need to be one that is a good quality that has an auto on/off feature to prevent cooking the battery.
The best thing would be to have someone go out and run the vehicle every once in a while.

queenvic8940

I recently had my 12 volt battery die on my RAV 4 hybrid. AAA said they could jump start the battery but not replace it as it needed to be synched to the hybrid system. Is this true? Could a battery be put in and synched later?