NEEWER NP-F750 Dual-Channel Battery Charger Set - NEEWER – neewer.com
Amazon.com: Kastar D-Li90 LTD2 USB Battery Charger Replacement for Pentax 645D, 645Z, 645Z IR, K-01 K01, K-1, K-1 Limited Silver, K-3, K-3 II, K-3 Mark III, K-5 K5, K-5 II, K-5 IIs,