Charging Time: How Long Does It Take to Charge a 6600mAh Battery with USB?
To charge a 6600mAh battery at a rate of 500mA, it takes about 13.2 hours. This is calculated by dividing 6600mAh by 500mA. Keep in mind that this is a theoretical time. Actual charging time may differ based on charger efficiency and other factors. For a basic USB charger that provides 5 volts and 1 … Read more