I removed LDO from my NodeUSB (ESP8266) board, and use LiFePO4 battery to power it directly.
700 mAh able to run about 6 hours (345 minutes):
Then, I charged LiFePO4 battery (3.3V LDO directly) and ran another test:
That is 95 minutes, so about 27% of capacity, 190 mAh.
Second test is much batter (I charged longer this time, for 3 hours):
|2016-07-09 13:25:18||2016-07-09 16:07:58||162 minutes|
That is about 47% of the capacity.
If use 3.5V LDO to charge LiFePO4 battery, it can reach 95% of capacity. I will test it next week.