Subaru BRZ Manuals 2014 BRZ Owner's Manual | Page 307

4-3. Do-it-yourself maintenance I Before recharging When recharging, the battery produces hydrogen gas which is flammable and explosive. Therefore, before recharging: G If recharging with the battery installed on the vehicle, be sure to disconnect the ground cable. G Make sure the power switch on the charger is off when connecting and disconnecting the charger cables to the battery. I After recharging/reconnecting the battery (vehicles with a keyless access with push button start system) G Unlocking the doors using the keyless access with push button start