Photon with PIR Motion Sensor powered by USB powerbank

[jonkho]

Hi @RWB
Thank you for the explanation and it makes sense now with the numbers. Probably, I need to get a Digital Multimeter to do some testing at my end.

@RWB

@jonkho I just tested the Photon's power consumption today and it consumes 30mA from a 13v battery.

At 5v thats around 78mA and that is low enough to make the portable USB power banks to think the charging of the connected device is done so it cuts off the power output to keep from constantly draining the battery. That's probably your problem, it has happened to me in the past also.

To find out for sure try plugging the Photon into your phones AC wall USB charger and see if you get the same problem.

Hi @Hootie81 Can you explain more about your comment about 'no under voltage cutout to protect the battery'? I was thinking if the battery does not damage the Photon device then I am ok with it. Thanks

@Hootie81

I have had this issue before, i pulled apart the battery bank and connected straight to the battery. only issue is there is no under voltage cutout to protect the battery. so i changed to the sparkfun battery shield