I got my batteries but i havn’t gotten the boost circuit yet. I couldn’t wait and decided to do a test with just the batteries:
I’ve made a battery pack of four 14.5 Ah SOCl2 spiral-type D-cell batteries in parallel and connected them to the JST on one of my test Electrons. It appears to be working like a charm and i’ve had it running during the whole night without any problems logging every hour and deep sleeping in between.
I can’t seem to read the battery percentage (says it’s 2.4%), but it guess that makes sense as it’s a different voltage than the LiPO. I read a 3.58v when the Electron is connecting/connected to the cellular network and the Particle Cloud and a 3.64v when the batteries are unconnected. I read 3.98v on the LiPo when it is connected, so i figured the LiPo must be at 2.4% when it reaches ~3.58v?
I’m gonna leave the electron out in the field measuring every hour, so i can see how it goes without the booster circuit.
I also got 2 Electrons running on just the standard 2Ah LiPO and a 6 watt solar panel logging every hour and deep sleeping in between. I get a nice graph that shows the LiPO hasn’t gotten lower than 79.77% that last 6 days. The Solar panel isn’t even setup in the most sun giving angle. Some cloudy days are coming this week, so i’ll see if it’ll still hold a good percentage.