lithiumcore 4a fast charger for boosted board v2 (compatible with mini s, mini x, plus, stealth, & rev scooter) lithiumcore input: ac 100-240v application: 42v 4a battery charger for 36v 10s lithium batteries output: 42v 4a charger type: cc and cv battery charger case material: abs + pc cooling way: built-in cooling fan size: 160mm x 85mm x 56mm certificate: ce fcc rohs operating temperature: -20 to 60 degree operating humidity: 20 to 90%rh storage temperature: -40 fo +80 degree protection over current protection over voltage protection short circuit protection reverse connection protection usage introdction dual color led indicator:(charging:red; fully charged or no load:green) light weight and compact high efficiency and low power consumption package 1 x 1pc 42v 4a lithum battery charger small spark when plugging in is normal