Any IT Hardware professional in this subreddit? Need help. Read description.

Suddenly a week ago my laptop started crashing with blue screen and before rhat chrome started giving me performance issues. And finally my laptop started to switch off if the adapter is removed doesn't work. I showed it to the laptop repair guy he didn't say much about the regular crashing of my laptop but he said it's a battery issue may have to be replaced. But the problem is the laptop is not Make in India, it's from Indonesia he said it's customised battery panel and the connector is also slightly different, maybe tough to acquire. Any of you experts know wether I will get anything like this in mumbai - lamington road or anywhere else maybe pune? Or anywhere in India where it can be shipped. Please let me know.