Hi all,
Thanks for the comments.
The term shield comes from the marking on the board itself which reads 'Battery Shield' and it is a stand-a-lone item not designed to piggy back another board. This naming does lead to confusion...
Here is a link to a single cell version:
I also trialed by commercial power bank with an Arduino project to see what occurred:
- Power turned on and powering Arduino
- Charger source connected - Arduino continues uninterrupted
- Charger source removed - output power is turned off
- Power output remains off
- Charger source reconnected - output power turns back on, Arduino now runs
For our purposes of powering an Arduino or Raspberry Pi with uninterrupted power this is less than ideal behaviour but is probably not too bad if the power bank is being used to charge another device that has internal power storage.
Back to the original question that prompted the thread: does anyone have a modification to these 18650 battery 'shield' so that they function more like a UPS?
Regards,
Graham