I try to make this circuit for my indoor plant, they does not look healthy without the light they needed.jenovauh,
I am glad you are making progress. Bernard has much more knowledge than I have, and can give better advice on battery chargers.
May I know what is the purpose of your LEDs?
Thanks for your help.
I will be back on more regularly in a few days.
By the way for the charging for 2 x 3.7V Lithium battery, is it very difficult to achieve? Or is there any other battery should be using instead of Lithium battery?