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
Amazon.com: Pentax K-50 Digital Camera Battery Charger (110/220v with Car & EU adapters) - Replacement Charger for Pentax Dli-109 Battery - : Electronics
D Li109 DLi109 D-Li109 Battery Pack for Pentax K-70 K70 K-50 K50 K-30 K30 K-S1 KS1 K-S2 KS2 K-r Kr Digital Cameras - AliExpress