Amazon.com : VONOTO Camera AA Battery Holder Box Adapter Bracket for K30 K50 K500 39100 D-bh109 DSLR : Electronics
Amazon.com : BM Premium 2 Pack of D-LI109 Batteries and USB Dual Battery Charger for Pentax KP, K-R, K-S1, K-S2, K-30, K-50, K-70, K-500 Digital SLR Camera : Electronics
Pentax K-BC109 Battery Charger Kit for D-LI109 Battery
Amazon.com : DSTE Replacement for D-Li109 Battery + DC112 Travel and Car Charger Adapter Compatible Pentax K-R K-30 K-50 K-500 KR K30 K50 K500 K-S1 K-S2 K-70 Camera : Electronics
Batmax 1800mah D- Li109 D Li109 Battery +digital Car Charger For Pentax K30 K50 K-30 K-50 K500 K-500 K-s1 Ks1 K-s2 Ks2 Cameras - Digital Batteries - AliExpress
MaximalPower Charger for Pentax D-Li109 and Pentax KP, K-R, K-S1, K-S2, K-30, K-50, K-70, K-500 Digital SLR Camera (Fully Decoded). an European AC Adapter and car Charger are Included - Walmart.com
Amazon.com : HQRP AA Battery Holder-Adapter Compatible with Pentax D-BH109 K-r K-30 K-50 K-500 Digital SLR Camera 39100 Replacement : Digital Camera Battery Grips : Electronics