Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
The charger is very compact. The batteries fits to the charger like a hand to a glove. Easy to insert and easy to take out but when batteries are in, they don't come off accidentally. You can turn it upside down and shake it a little but still the batteries remains inserted to the charger. You can charge either 1 or 2 batteries at same time. Red light tells you the battery needs to be charged more and green light tells you it's ready.
These batteries have the same rating as the original ones which comes with a GoPro Hero 3+. The ratings are 3.7V, 1180mAh, 4.37Wh. Based on my personal testing with 1 original battery and several of these KingMa batteries. It takes about 2½ hours to get a battery fully charged after it's empty. Full battery gives roughly the same operation time regardless if it's an original or KingMa one, so there's not noticeable difference between these.
Can't see any.
I tested several of these batteries and compared them to original battery which came with Hero 3+ Silver Edition. All batteries were quite new when tested, including the original one. Short result is that there aren't noticeable differences between any of the batteries. All tested KingMa batteries gave almost the same charging and operation times as the original battery.
If you use your Hero actively you will surely need some extra batteries ready to be used. And the charger is so small it can be carried in a pocket if necessary to be able to recharge the batteries on the go. And these are very decently priced especially when taking the quality in consideration.
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