The batteries last (their promise). Almost as good as the original, tested 80% power. However, the durability is not yet proven. The charger is crap! The batteries must be very secure. Anyway you slip out again. So that is no longer loaded. After a few minutes, no contact is present. A hundredth Mililimeter more leeway would have been enough .... But I have solved the problem with Ingeniörkusst: Just install a 2 kg weight on the battery to be charged and you're no longer ruscht out and after a few more hours, the battery is loaded successfully!
Conclusion: Charger burn. Charging the batteries well and better directly in the Hero.
