Durapro D-li50 Np-400 2000mah Camera Battery For Pentax K10d K20d Konica Minolta Dimage A1 A2 Dynax 5d 7d Sigma Sd15 - Digital Batteries - AliExpress
Pentax K20D: Digital Photography Review
D-li50 Battery For Pentax K10d / K10d Gp / K10d Grand Prix / K20d Camera - Digital Batteries - AliExpress
Amazon.com : D-LI50 Battery 2-Pack Bundle with Rapid Travel Charger and UltraPro Accessory Kit for Select Pentax Cameras Including K10D and K20D : Digital Camera Batteries : Electronics