Hi, starting a new threat on how to minimize the Kindle battery consumption.
Personally, I am running a python clock app on a PW4 and am trying to get the longest life between charges. I have run a number of different experiments, and they all get about the same life (all using rtcwake):
1) Full clock app waking up the processor every minute (260 lines of code).
2) Stripped down app displaying only minutes digit (28 lines).
3) Stripped down app waking every minute, not displaying anything (27 lines).
Note that wifi is mostly off for 1 and always off for 2 & 3
The first two consume about .5% battery/hour - no difference!
Running the third experiment now; will report back in a few hours.
I was going to completely re-write the app to make the code more efficient, but it seems the few hundred lines of code make little difference in consumption, so it is not worth the effort.
Some options for greater efficiency:
1) Use Powersave - I have not been able to make that work on the PW4, and in any case, I don't expect much change - everything will run slower, but longer.
2) stop or kill a few unnecessary tasks - I don't think there are any that utilize much cpu.
Currently the clock will run about 8 days between charges.
Any other ideas?
Personally, I am running a python clock app on a PW4 and am trying to get the longest life between charges. I have run a number of different experiments, and they all get about the same life (all using rtcwake):
1) Full clock app waking up the processor every minute (260 lines of code).
2) Stripped down app displaying only minutes digit (28 lines).
3) Stripped down app waking every minute, not displaying anything (27 lines).
Note that wifi is mostly off for 1 and always off for 2 & 3
The first two consume about .5% battery/hour - no difference!
Running the third experiment now; will report back in a few hours.
I was going to completely re-write the app to make the code more efficient, but it seems the few hundred lines of code make little difference in consumption, so it is not worth the effort.
Some options for greater efficiency:
1) Use Powersave - I have not been able to make that work on the PW4, and in any case, I don't expect much change - everything will run slower, but longer.
2) stop or kill a few unnecessary tasks - I don't think there are any that utilize much cpu.
Currently the clock will run about 8 days between charges.
Any other ideas?