Amazon.com : Pentax K-x Digital SLR with 2.7-inch LCD and 18-55mm f/3.5-5.6 AL Lens (Black) (Discontinued by Manufacturer) : Slr Digital Cameras : Electronics
No battery grip for the K-x... My solution! - PentaxForums.com
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Amazon.com : Pentax K-x 12.4 MP Digital SLR with 2.7-inch LCD and 18-55mm f/3.5-5.6 AL and 55-300mm f/4-5.8 ED Lenses (Black) : Slr Digital Cameras : Electronics
Battery Grip? - Page 2 - PentaxForums.com
D-bg5 Battery Grip For Pentax K3 K-3 K-3 Ii K3 Ii Slr Camera, D-li90 Dli90. - Battery Grip - AliExpress
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X-Grip DSLR Camera Handle + Light Kit for Pentax K K70 K50 K7 K5 K3 KS2 KS1 K1 | eBay