Best PNY Power Bank 10400mah in Amazon India. Check out this 3.7 volts Li-po battery powerbank that comes with 10400mAh capacity. It has a unique feature that is auto power off that make better use of your battery energy. This pny power banks comes with single USB output along with LED torch light. There is also 4 LED power indicator that shows battery level. You get a one-year limited warranty for this powerbank from the date of your order.