"NPower offers this state-of-the-art lead-acid battery that produces higher cranking amps, along with lower self-discharge and greater vibration resistance. AGM absorbed glass mat battery design requires no water additions and can be operated in any position and in close proximity to people and sensitive equipment. Ideal for use with the NPower Flex/Powerpack XL 6-in-1 powerpack/jumpstarter, air compressor system Item# 24928, sold separately. Amps 18, Battery Chemistry Sealed lead acid, Battery Type AGM, Volts 12. Amps @ 20 hours 35 Sealed, no-leak design Heavy-duty, no-corrosion terminals"