If you do not use the PENpal it will stay charged for up to 10 days, but we recommend giving it a booster charge for 45 minutes before use. Connect the PENpal via the USB cable to a computer and it will charge fully in about 1.5 hours, if using rechargeable batteries. If you use earphones the charge will stay a very long time. The main power drainage is from using the speakers. Even then, if you continuously tap a sound spot at the rate of 50 taps per minute, the pen will only drain in between 3 to 5 hours!
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