If you have a USB tool to monitor the actual battery capacity, be sure to use it here. Then store the value somewhere you will be able to find later. Like maybe on the device or charger. Then you will be able to determine battery degradation at any point in the future and also determine if there is a problem with the hardware. For instance, if the battery is going dead in half the time it did when new, but the battery still holds 90% of what it did when new, your problem is not due to the battery.
If you have a USB tool to monitor the actual battery capacity, be sure to use it here. Then store the value somewhere you will be able to find later. Like maybe on the device or charger. Then you will be able to determine battery degradation at any point in the future and also determine if there is a problem with the hardware. For instance, if the battery is going dead in half the time it did when new, but the battery still holds 90% of what it did when new, your problem is not due to the battery.