I’ve got a Wiz 20. You can charge it via any 5V USB source with a micro USB plug on it such as a computer USB port or a dedicated USB charger.
I looked up your Samsung adaptive fast charger and it looks like this should be OK if it’s something like this one:-
http://www.samsung.com/uk/consumer/mobile-devices/accessories/power/EP-TA20UWEUGGB/
Hope that helps.
Yes that’s the charger I’ve got.
Usb port off the computer takes forever to charge these batteries, when you say ‘dedicated usb charger’ do you mean like a phone charger or like a 3pin battery charger?
I’ve got an Xtar MC1 charger for my helmet light so could get an MC2 for these batteries just to make sure they’re safe. Although I use a 5v phone charger to power it.
Or I’ll probably just use the 5v charger in future, rather than the 9v.