Mr.Batt 1050mAh Replacement Battery for PENTAX D-LI109 (Pack of 2) Battey type: Rechargeable Li-ion, voltage: 7.4V, capacity: 1050mAh, power: 7.8Wh Replace PENTAX D-LI109 battery, and compatible with PENTAX K-R, K-S1, K-S2, K-30, K-50, K-500 Same power as the original ones, 100% true capacity CE certified and tested by manufacturer to match OEM products 30 days money back guaranty and 1 year limited warranty