I am wanting to run my arduino as well as some external 12V (5W) LEDs. I have found a cheap DC 12V 1800MAH Super Capacity 1800MAH Rechargeable Li-ion Battery. Ignoring the Arduino for now, based on V=P/I, the current of a single LED will be 5/12 = 0.42A Does this mean that the above battery could…

Battery running time - confirmation needed - #7 by system - General Guidance

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