ultra-portable: xbox one controller charger station, same size as iphone8 plus, can save more room. and it stores your controllers when not gaming durable battery: the controllers can be charged in 4 hours with two rechargable 1200mah batteries, which can work at least 10 hours! and the battery can be charged for over 500 times. plug & charge: when controllers runs out of the power, simply put the xbox one controllers on the charging stand and they will be charged automatically without dismantling batteries. safe and smart: built-in intelligent protecting chip has overcharge protection and safety circuit. when the battery is fully charged, it stops charging automatically and no longer worry damaged controller.