A few things to try:
1.) Let the battery completely drain and recharge to 100%. By completely drain, I mean let it run until it shuts itself off. Then wait 15 minutes, turn it back on, and let it run until it shuts itself off again. This will ensure the battery is discharged. Then charge it to 100%. Hopefully, this will recalibrate the battery and let any "smart charging" software figure out the 0% and 100% levels of the battery. https://www.androidpit.com/how-to-calibrate-the-battery-on-your-android-device
2.) If the above doesn't work, you can reset the software. https://www.verizonwireless.com/support/knowledge-base-129346/
3.) Replace the battery. [guide|78404]