Powerextra 2 Pack Replacement Pentax D-LI109 Li-ion Battery and Charger Compatible with Pentax K-R, K-30, K-50, K-500, K-S1, K-S2 Camera Battery Type:Li-ion / Voltage:7.4V / Capacity:1400mAh Includes 2 batteries and 1 charger power for your Pentax D-LI109 and Pentax K-r, K-30, K-50, K-500 Superior quality cells have overcharge, over discharge, over voltage and short circuit protection for better battery life No memory effect, batteries can be charged at any time without any harm Powerextra products come with 30 days money back policy and 24 hours friendly customer service!