8 AAA rechargeable batteries 1,100mAh with Smart Battery Charger $13.59 on Amazon from EBL

COMPATIBILITY- Works with all types of 6V and 12V lead-acid batteries that are less than 100Ah, such as AGM, GEL, SLA, Flooded (WET), Calcium type deep cycle automotive or marine 4.0Ah-100Ah 12V battery. GOOLOO battery maintainer charger is a great choice for cars, trucks (small), motorbike, lawn mowers, tricycles, electric vehicles, agricultural vehicles, off-road vehicles, pickup trucks, boats, yachts, and motorboats., 6-STAGE AUTOMATIC CHARGING - 12V battery charger operated with 6-stage automatic charging process by MCU controller: desulfurization, soft start, bulk, absorption, battery test, floating/trickle to indicate quantity of electricity and monitor the whole charging progress. Stops automatically when the battery is fully charged. (Cautions: Only 12v battery supports trickle charging), SMART BATTERY MAINTENANCE - Maintain various types of 6V or12V lead-acid batteries up to 100Ah. Intelligent control system with strong pulse repair technology, removes vulcanization, repairs slightly damaged batteries, reduces water loss, and can extend the battery life. Makes your battery more powerful., INTELLIGENT DETECTION & INTUITIVE LCD SCREEN - When low-voltage, vulcanization, or battery capacity loss is detected, LST battery maintainer charger directly prompts the user to repair and charge the battery or if the battery has lost its value, and is not repairable. LCD screen displays charging status, battery voltage/ current, and battery status clearly, providing visual feedback and diagnostic information even when in maintenance mode., MULTIPLE SAFETY PROTECTION FUNCTIONS – Made of fire retardant materials. It has multiple security protections, such as over-current protection, over-charge protection, over-heat protection, reverse connection protection, short circuit protection, fully charged stop protection, etc.

Meet the GENIUS2 - Similar to our G1100, just better. It's 34% smaller and delivers 65% more power. It's the all-in-one solution - battery charger, battery maintainer, trickle charger, plus battery desulfator., Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries., Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates., Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts., Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life., Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge., Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawnmowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more.