Its a relatively complex piece of electronics from China that your paying 10 bux for.
If it dont work or dies early I don't hassle suppliers. Just toss them and move on. Mabe send it back for a refund but after shipping and time involved whats the point?
Anyway, I use 18650 and 14500 3.7v batts now. They're rarely defective, are cheap, hold a charge better and last longer.
Any KR batt is hit and miss... Prolly tossed about 5 bad ones when I started out
If it dont work or dies early I don't hassle suppliers. Just toss them and move on. Mabe send it back for a refund but after shipping and time involved whats the point?
Anyway, I use 18650 and 14500 3.7v batts now. They're rarely defective, are cheap, hold a charge better and last longer.
Any KR batt is hit and miss... Prolly tossed about 5 bad ones when I started out