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/diy/ - Do It Yourself

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>> No.1483898 [View]
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1483898

>>1483885
>>1483889
Weak... so that older power bank worked fine while the new one flashed 3 times. I open up the old one and take out the circuit board. 18650 to the circuit board, then out to the light. While it worked in the power bank hooked up to the little square Li-Ion, now on this 18650 it flashes once and shuts off.

I suppose I could still use it to charge the battery safely. 5V micro USB goes into it and it sends 4.2V back to the 18650.

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