Riptide SL Group 27 Deep Cycle Battery These batteries are available at Wal-Mart, Costco, Auto-Parts Stores, Batteries Plus. Riptide XP 35 Amp Hour Deep Cycle Battery These batteries are available at Batteries Plus a nationwide chain and Amazon Battery Charger Any 12 Volt Automatic charger with a minimum of 7.5 amp output will work with your battery. It is important to not select a trickle charger, as these are meant for maintaining batteries and will not charge the battery overnight. You will want to select a charger with a minimum output of 7.5 amps. Automatic battery chargers are available at Batteries Plus, Wal-Mart, Amazon, Costco, Auto-Parts Stores, and other retailers.