Select your product to confirm this information applies to you
Monterra Charging Time
The amount of power that is devoted to charging the Lithium-Ion Battery Pack is determined by many factors.
A shorter charging time can be achieved by plugging the Monterra™ outdoor handheld into the wall with the USB Power Adapter, versus plugging it into your computer.
A shorter charging time can further be achieved by leaving the device in power save mode with the screen off, versus utilizing the device (with the screen on, interacting with the Android operating system, Wi-Fi connected, etc.). If the device is fully turned off, it will not charge at all.
Choosing a less effective method of charging may result in an increase of one to two hours of charging time, or in certain cases may prevent the device from charging at all if it is receiving less power than it is using.
If the above suggestions are being utilized, and if your battery is older (greater than a year), it is possible it is failing and a replacement may be needed. It is also possible that the USB Power Adapter and/or the USB Cable need to be replaced. Before purchasing replacements, attempt to charge the device with different outlets as the outlet may be the cause of your issue.