HQRP Ultra High Capacity Ni-Mh 1/2D 6V 3500mAh Rechargeable Battery for STREAMLIGHT SL-20 / SL-20S / SL-20X, MINI STINGER 200394 / 20X1701 Replacement plus Coaster HQRP&reg; Ni-Mh 1/2D 6V 3500mah Battery Pack plus HQRP&reg; Coaster; Battery Type: Nickel?metal Hydride, 5 Cell 1/2D; Capasity: 3.5Ah; Voltage: 6V; Dimension: 1.3" (33mm) x 7.2" (184mm); Extra High Capacit and Long life cycle, can be recharged over 500 times! 200 Days Warranty!