Wah lan eh, topics as old as 4 years ago still can find it back & bump it wor? Champion ler u guys here. I moons years didn't login to ZTH.com as been too busy with job & commitments.
just did some did and tested my DIY VS using 12v batt. everthing is o.k, LED indicator light off when charging and on when fully charged. when removed the power supply (12V battery), the LED remain on... let the VS...