Would you be able to chuck a link/picture up to the RC charger you have. I have the same ebay light as you've just ordered, and I'd like a proper charger rather than the flimsy thing that comes with it
Oddly on the inside it's a standard electronic transformer, that's why they are flimsy. It's a modified USB charging circuit board with neat soldering and well finished. Quite surprised really. The code leads to Singapore Batteries.
Which seems a sensible idea given the current and voltage on USB chargers are for Li-On batteries (rapid charge at 1A)
I had written the details of it, but as I was typing We had a 2 hour power cut in the area... shush, don't tell them I plugged this PSU in
AS for the battery setup, it doesn't look waterproof and I've not pulled the covers off.