I got the low battery message today, that 03-2019 battery was down to 2.832 volts, so that’s only 6 months since it was installed. This VP2 ISS doesn’t get much sun but even so I don’t recall ever losing a battery that quickly before 
I got the low battery message today, that 03-2019 battery was down to 2.832 volts, so that’s only 6 months since it was installed. This VP2 ISS doesn’t get much sun but even so I don’t recall ever losing a battery that quickly before