It was simple and good looking battery charger, but it is a bit did not work properly from first day.
Theoretically, this should charge the battery with 0.65A current. But this did not happen and the battery charge could take a week.
No need to be a genius to check the charging current. For a fully discharged battery It was low as 0.03A (top). And it's a good opportunity to see what is in the middle. Of course, I took off a plastic hood and got access to the board.
As you can see in the picture, the circuit is logically divided into two parts, by transformer. Left - AC-DC converter, on the right - the charging circuit w/LED.
27 july, 2016 SKootS