The Duopal Extra from Hahnel is fully compatible with the original Go Pro Hero 4 batteries. It can be used to charge up to two Hero 4 batteries at the same time and features an internal power bank that can provide you with emergency charging when away from the mains. This means you don’t have to miss a thing whilst out on your adventures. Keep your Go Pro running and boost your phone’s battery life to work out where you are going next. The Go Pro batteries can be fully charged within 2.5 hours, giving you up to 5 hours recording time in total. A Mini USB to USB cable is included in the kit. RRP £39.99
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