Amazon.com : Pack of 2 D-LI109 Batteries and Battery Charger for Pentax K-R, K-S1, K-S2, K-30, K-50, K-70, K-500 Digital SLR Digital Camera : Electronics
Fr Fo Eyecup Eyepiece Eye Cup Viewfinder For Pentax K-70 K30 K50 K70 K500 K5 K7 K5ii K5iis K-s1 K-s2 Ks1 Ks2 Camera - Photo Studio Kits - AliExpress
Pentax K-500 vs Pentax K-50 Detailed Comparison
Amazon.com: D-Li109 USB Charger for Pentax K-1S, K-30, K-50, K-500, K-r Camera and More : Electronics
Original Replacement Battery D-li109 For Pentax K30 K50 K70 K500 Kr Ks2 Ks1 K-30 K-50 K-70 K-500 K-r K-s2 K-s1 Authentic 1050mah - Mobile Phone Batteries - AliExpress