[ahmadarifai]

If you don't like rechargeable batteries like me, and since Chinese batteries don't really work, here is how to cancel the vl2020 the right way.

 you need cr2032 housing also remote cover with battery opening

1- first you remove old battery and scratch board same location as picture.
2- apply solder on the scratched area
3- solder one leg of housing to positive only 
4-put in cr2025, and put pcb in Chinese cover

works good,