There’s something wrong with the device. Paperwhite’s battery should last for weeks, especially if it’s somewhat recent model. Try to calibrate the battery by charging it to full, and continue to charge couple more hours after it’s full. Then use the device until the battery is completely empty (the device turns off by itself). And finally charge it to full. Do not charge it while you are discharging the battery, or interrupt the charging while charging to full. If that doesn’t help, the battery might be faulty or there is something wrong on the software side of things.
There’s something wrong with the device. Paperwhite’s battery should last for weeks, especially if it’s somewhat recent model. Try to calibrate the battery by charging it to full, and continue to charge couple more hours after it’s full. Then use the device until the battery is completely empty (the device turns off by itself). And finally charge it to full. Do not charge it while you are discharging the battery, or interrupt the charging while charging to full. If that doesn’t help, the battery might be faulty or there is something wrong on the software side of things.