UPG 12V 35AH Sealed Lead Acid Batteries x 2 (Pair) – U1 Battery’s UPG sealed lead acid (SLA) batteries are designed to cycle on a daily basis so they provide the highest level of battery life for demanding applications. This battery features ’non-spillable‘ construction which prevents the battery acid inside from spilling or leaking out and is virtually maintenance-free. Because this battery is non-spillable, it is classified as nonhazardous and can be taken on boats, trains, and planes. This battery can be used for most travel scooters and travel power wheelchairs. Features Non-spillable construction Sold in pairs Each battery measures 5.19″W x 7.75″L x 7.13″H Safe for travel on planes, boats, and trains