2013 Toyota Highlander Owners Manual - Page 12

1-1. Hybrid system ● If the shift lever is in N, the hybrid battery (traction battery) will not be charged. When driving in heavy traffic, operate the vehicle with the shift lever in D to avoid discharging the battery. ● To help prevent the 12-volt battery from becoming discharged, drive the vehicle at least once a month, and operate the accessories only when the "READY" indicator is on. When parking the vehicle, make sure the doors is closed and all lights are turned off.