Sorry if asking wrong people but I’ve got a samsung galaxy j3 prime, its a really old phone and i lost its charger a year ago, after that until now I was charging it with a different cheap charger, and one day eventually while using the phone the back cover fells of(it has removable back) and then i realised that the battery became swollen, I immediately took the battery out and kept the phone and battery apart for 2 months, now today I lost patience and grabbed a safety pin and did a little hole on both sides of the battery. Now it fits !!! and is much less swollen then before(yes it is still a little swollen)
So I meant to ask would it be safe to use it like that or is there a risk of the battery going kaboom!!! while i am using the phone or charging it ???
There is not a chance this happened in the US, because the moment he noticed the battery was in an unsafe condition, he was expected legally to perform due diligence and dispose of it safely. The fact that he not only returned it to you, he made it even more unsafe, you would be able to sue him had it blown up later.
If you still have that phone, give it to a (DIFFERENT) phone repair store to throw away immediately, or another battery recycling center. It’s not only a danger to you, but to those around you. Potential for fires, toxic smoke, and injury.