they said the battery is ok, but I need to the machine near the volume

Oman Muji all of this “The battery won’t charge, sometime it’s charging but it won’t last long when i use it only less then a hour” would make me replace the battery no matter what the repair shop says. I wondered how they tested the battery since it will require a load to show how long it will last. A simple things to do would be to use a USB ammeter when you charge and see how many amps it draws. If it does draw then it is not anything else but the battery. Start with that first.