Iv like to test and know how much uptime can be achieved by different powerbank.
I purchased this powerbank case on ebay and then purchased the 18650 3.7v batteries separately.
I have built two powerbank with identical cases but different batteries.
- Batteries 18650 9600mha – 23 Hours
- Batteries 18650 6000mha – 18 Hours
It should also be noted that the Raspberry Pi is online via wifi during the whole test while getting pinged every minute.