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Suppose i buy this powrrbank and charge it daily with a 20Wp solar panel with usb stepdown module. Each li-ion = 2200mAh.
With a stepup module or joule thief i lightup daily 2x5watt 220v ac led bulb for approx 3hours each evening or usb leds of each 5watt.
I think the batteries will last pretty long if i use it daily as per above, 30 watt/hours only.
Can anyone estimate how many years it will last?
With a stepup module or joule thief i lightup daily 2x5watt 220v ac led bulb for approx 3hours each evening or usb leds of each 5watt.
I think the batteries will last pretty long if i use it daily as per above, 30 watt/hours only.
Can anyone estimate how many years it will last?