Battery Power

NAshworth2

Any thoughts/feedback on powering the nRF9160 Feather with two AA Alkaline cells?

jaredwolff

In parallel or series?

Series should work but I haven’t tested this configuration. Parallel will likely not work and isn’t supported.

aquafern

Hi @jaredwolff , what about using a lithium ion (coin cell) as a ‘backup’ power source? Would this not work connected to the VBAT pin because they are not rechargeable?

For context, I’m looking for a small form factor, always on power solution which would then switch to a different source when out of low power standby state.. Thanks

jaredwolff

aquafern if you’re using it to keep the RTC running that may be ok. (or even the nRF9160 in sleep) If you’re using the coin cell while LTE is active, that will not work. Transmission draws up to _500mA which is way too much for a tiny coin cell to handle.

aquafern

Ok great. Thank you so much for the quick reply!

jaredwolff

aquafern You got it!