VMAX857-35 -MP AGM 35AH Compatible Wheelchair VMAX Battery for Hoveround Activa DM Comp with all wheelchairs using 7.7" * 5" * 6.1"H . Heavy Duty 12V AGM DEEP CYCLE BATTERY Maintenance free with Float Service Life span of 5 to 8 years. Sealed Non Spillable Non Hazardous Construction. Approved for air ground and meritime transportation. All VMAX batteries have VMAX logo lables with "vmax" stamped on top of battery. VMAXMB857 Exclusive Authorized Amazon Seller : bargainshore