I am so sorry you are having the same experience as some of the other Motorola Z2 users. That was never what we intended for our customers when we introduced this model, and we are very invested in resolving the issue for each and every customer that has been affected. We have found that following the instructions in this link to perform a Factory data reset will correct your issue. Please make sure you remove the SD memory card first and then follow the battery recalibration instructions below. If it does not work, we will very happily replace the device for your daughter. Please don't hesitate to reach out if you need more assistance. https://www.verizonwireless.com/support/knowledge-base-212927/
Recalibrate the battery
Press and hold the power button until the phone reboots (10secs)
Plug phone into the OEM Turbo charger
Allow phone to charge to 100% (leave on the charger overnight).
Follow us on TWITTER @VZWSupport
If my response answered your question please click the _Correct Answer_ button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!