With this set, which was kindly provided by Rollei charge as a review copy available, you not only get two more batteries, so then has a total of four batteries are available, but you also get a USB charger yet. Ie as soon as a battery is empty and you can do another in the Cam to empty directly recharge again. Power gets the charger via USB, which means you must either connect to a computer or eg with a smartphone charger directly into an electrical outlet.
For the way so-called Powerpacks, therefore recommended mobile batteries very. I own a Power Bank you can charge with 10,000 mAh, and then you can go for example to connect his smartphone via USB and this upload it. But also all other USB devices such as this battery charger. Thus, one can also go recharge his batteries again without outlet nearby.
Each battery has 1050mAh and can last up to 90 minutes. Talk to four batteries can take from home for up to six hours if you still can easily recharge the batteries without any problem you have to worry about the capacity of the memory card rather.
I have already criticized in reviews on other Actioncams that there is no nachkaufbaren batteries for many models and have said that I think that a fair price would be 15-20 so and I would spend as much. In order for this package is priced about the area that I would consider to be realistic, and I would 10 less than optimal price classify.
