Powersonic 12 Volt 35 Amp Hour Battery Electric Wheelchair Scooter U1 Original Power Sonic PS-12350 12V 35AH SLA Battery. Dimensions: (L) 7.72 x (W) 5.14 x (H) 7.00. Weight: 24.70 lbs. SLA/AGM maintenance free, spill proof battery Rechargeable battery that can be mounted in any position, resists shocks and vibration 1 Year Warranty