how much backup can be obtained from 18650 (2600mah) battery and 5w led bulb as a load? Answered
i have some basic questions and want to clear my mind.
i want to create a portable power bank using 2*18650 (2600mah) rechargeable battery and 5w usb plugged led bulb (5v).
So keeping in mind the above values how can i determine the maximum backup this setup can provide?
i would highly appreciate if you provide some real life examples to calculate the above mentioned values.