My Librem 15v4 arrived on 2019-02-27 and by 2020-08-01 the battery was only lasting about 3.5 hrs, and by 2021-05-21 the battery was almost dead. It’s possible that I left it on the charger too long. I don’t know if the Librem 15v4 cuts the power from the charger to the battery. Does anyone know?
I wanted to buy a replacement battery from the Purism shop, but both new and used batteries were out of stock (I see at this moment that a used battery with 90-day warranty is in stock).
By the way, @mladen confirmed that the Librem 15v4 can run with a dead battery AND with the battery completely removed. I verified both.
Thanks to @MrChromebox for giving the part number (U753-TS44-111) at Librem 15 rev 3 battery replacement , which allowed me to search online. I found nothing on eBay and many other battery sites. Everyone was also out of stock. Finally on 2021-06-05 I found https://www.replacement-laptop-battery.com in Hong Kong, which had it in stock (and just now is saying out of stock). A new one was $109.16 with 1-year warranty and shipping included (the same price as a used one just now seen on Purism’s shop with 90-day warranty). So I decided to buy it and hope I had not thrown away my money. This was the first time I had bought anything directly from China. I used PayPal, they shipped it very quickly, and they emailed me a tracking link. I watched it depart from Shenzhen, arrive in LA on 2021-06-23, then at my Post Office on 2021-07-08. So, 1 month, 3 days from China. Not too bad!
It works fine and I reliably get 5.5 hrs out of it, with about half screen brightness, Internet active, and an external monitor attached. I now use GNOME Clocks to set a timer to remind me to either unplug or re-plug the charger, although I did run it down to 10% to see if GNOME gave me a low-battery warning, and it did. That did not happen with the old almost-dead battery: the system would just power off with no warning. A couple of times I have charged to 100% and the max time I saw was 5hr 38min.
One warning: the white plastic connector from the battery to the Librem 15v4 is very flimsy, basically a part with a duty cycle of 2 or 3. When I removed the original battery connector, it disintegrated in my hands. So I was a bit worried that when I plugged in the new battery, it would break. I was lucky and it did not.
Hope this helps someone!
p.s. The only thing that could be better about this is if I didn’t have to remove 15 [corrected: 14] screws from the back of the Librem 15v4. At least Purism made them all Phillips head screws of the same size, though a few are longer than the rest, so you have to keep track. A battery door with a more durable battery connector would be great. Does the Librem 14v1 improve on this?