Designed to fit these BOSCH+ Cordless Power Tools: 3860CK/RK/K/CRK, 1659K/RK, 1644K, Replaces BOSCH+ BAT025-2 610 909 020, 14, 4 Volt Bosch NiCd Battery 2, 0 Amp, All batteries are tested for maximum performance and reliability, TopCell Batteries use only the highest quality cells (Panasonic, Sanyo), Superior performance at a fraction of OEM prices, SKU: TOPCB002