I'm not sure if this is standard behaviour or whether I'm doing something wrong.
I wanted to have a pizerow operating remotely on my roof without the need to bring electricity there. The plan was to use a solar panel (https://www.waveshare.com/solar-panel-6v-5w.htm) , a solar panel controller (https://www.waveshare.com/solar-power-manager.htm) and a battery to power up the pi. My hope was that the battery recharged by the sun during the day would have been enough to overcome the hours without light.
The pizerow is under some medium-heavy load: I have a DVB dongle connected which is used to upload ADS-B data to Flightaware and a camera connected which is sometimes used to take pictures. Wifi is always connected. CPU stays always at about 60% usage.
I tried to set up the solar controller with a 1600 mAh 3.7V AA rechargeable battery (it's mounted directly on the solar controller as you can see in the image) and, after loading with the micro usb, tried to disconnect and let the pizerow run with the battery.
Unfortunately after just 2 minutes the battery slowly dies. I understand the pizerow is under load but is it really normal to have the battery die so early? My understanding is that, even under load, the consumption should be about 400-500 mA which does not really justify such a short life span. Or maybe is the battery just dead?