Another Battery Test

This time, I tested the longevity by charging to full, turned off all three killswitches, set the phone aside, then only activated the screen occasionally to check the charge (except when I was sleeping).

The battery drained from 100% to 3% in just over 14 hours.

My final check of the power level at about the 14-hour mark actually showed a remaining charge of about 35%, but that was apparently inaccurate, because a few minutes later I noticed that the phone had shut down. When I turned it back on, the level was at 3%. So the charge indicator is still way off, as has been explained before.

I have this phone on WiFi most of the time, with cellular sometimes on and sometimes off, and I’m getting from 6 to 8 hours comfortably, depending on what I’m doing with it.


FYI, it took about 4 hours to recharge after that 14-hour drain.
(And yes, I’ll probably have to buy a new battery from Purism if I keep this up! Lol!)


Thanks @amarok. I added your info to the FAQ:

When you buy an extra battery, please share if you find a generic charger that works to charge it. One good thing is that you can use the Librem 5 without a battery if plugged into the USB cable, which means that you can hot swap the batteries without turning off the phone.


I recommend adding “from a nearly depleted battery” to your sentence here:

“4 hours to recharge the battery”

Because it takes much less time to recharge when the battery isn’t so empty.

1 Like

My first test (using different parameters) yielded 10 hours:

The difference being that I did not have the killswitches off.

1 Like

I changed it to this:
“He also reports that it took 4 hours to recharge the battery after draining it down to 3% charge.”


With the disclaimer that until the percentages shown are close to accurate, it is difficult to be certain about the details.

The most definitive test is: Put the phone in the state (HKSs) that you want to use it, fully charge it, leave it completely idle until it shuts down. That’s the number of hours, regardless of whether the percentages shown are accurate.

For me that would be two tests, roughly speaking - one for home (nothing killed) and one for out-and-about (WiFi killed).

for me the most important part about accurate battery reporting is to not deviate too much from reality between 25-33 % since i don’t plan to leave the El-Cinque battery drop bellow that point. i’ll use any means available at my disposal to prevent that from happening since i want to conserve the battery cycles as much as possible.

good stuff ! carry on !