Nikon MH-21 Quick Charger for EN-EL4 / EN-EL4a — Pro Photo Supply
Source Replacement Dual Channel Battery Charger for Nikon EN-EL18 EN-EL18a Batteries EN-EL4 EN-EL4a MH-26 on m.alibaba.com
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Amazon.com: Nikon MH-21 Quick Charger for Nikon EN-EL4 and EN-EL4a Rechargeable Li-Ion Batteries : Electronics
Used Nikon MH-22 Dual Battery Quick-Charger for the EN-EL4 & EN-EL4a 25375 in 'Mint-' condition
ProLine EN-EL4/EN-EL4A 3350mAh Video Battery | Jupio