This is the Losi Mini Peak AC Charger for their 1/18 scale vehicles.
The Mini Peak AC Wall Charger is an inexpensive AC quick charger with peak detection safety for NiCd and NiMH battery packs. This charger plugs into any common 110v wall outlet and will quickly charge Losi 1/18 scale battery packs (LOSB1201, LOSB1202, LOSB1210) in under one hour.
After the battery pack has been safely charged with the peak detection circuitry, the Mini Peak switches to a safe trickle charge. The trickle charge allows the charged cells to equalize and provide the maximum performance when driving your 1/18-scale vehicle.