How to check charger and battery issue by voltage meter?

How to check charger and battery issue by voltage meter?

In this video we are going to show you how to use voltage meter to check ebike battery issues as following: 1.How to check the charger is working or not ? 2.How to check the battery output hole is working or not ? ( If your battery is full charged but unable to turn on the bike computer) Hopefully, this video is useful.