Nothing happen after replaced apple watch battery

hello guys,

I have 2 apple watch series1 and 1 apple watch series 2. my customers said the battery is bad and they want me to replace the batteries. I did with 3 apple watch series 2 batteries and they all same, green snake of death. turn on for a while, try to pair with my iphone and green snake again. always like that.

And second case with apple watch series 1, I try with 7 batteries and they all same, nothing happen on the watch. these cases make me crazy. I don’t know if all apple watch battery replacement out there is really bad or the watch it self is the problem.

Anyone have experience with this issue? Really appreciate your help guys. and sorry for my bad english as it’s not my native language.

crwdns2893858:0crwdne2893858:0 crwdns2893862:0crwdne2893862:0

crwdns2894050:0crwdne2894050:0

crwdns2889612:0crwdne2889612:0 1
crwdns2892346:0crwdne2892346:0