"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. Battery Chemistry Sealed lead acid, Amps 18, Volts 12, Battery Type AGM. Amps @ 20 hours 18 Sealed, no-leak design Heavy-duty, no-corrosion terminals 500 peak Amps, 140 CCA"