12V Lithium ion Battery for CP4000 Range Li ion batteries give an all round better performance than standard Ni Cd / Ni MH cells. They maintain a high energy density level with a flat discharge curve. performing better & longer than a conventional Ni CD / Ni MH battery. No memory effect allows the battery to recover from a deep discharge with no tendency to reduce overall capacity. Requires 1 hour mains charger (sold separately, order Model No. CP40MC). Suitable for use with Sealey 12V Lithium ion range.