Hi…I just purchased a used Onda V919 Tablet which was a dual OS model, and has been updated to Windows 10 only no more Android. The unit is only approx 2 weeks old and I am happy with the battery life, but when flat, it takes about 12 hours to charge. The output on the charger is DC5V 2000MA. Would it be possible to get a faster charger to cut down the charging time, and not harm the battery.?