Battery for Librem 5

Surely the Librem 5’s screen will not be any more difficult to replace than the screens on other phones. I’m glad options are being considered to make it easier than other phones, but if, in the end, that isn’t feasible, I’m sure it will not be too difficult to replace it (especially if the appropriate adhesive gasket is sold along with the screen, so that we don’t have to cut it out ourselves from raw material).

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My joke in a previous post about four triple-A’s still applies.

Right ? I guess theyre going to really push the limit of this shipping in Q3 claim considering 3 weeks from now will be the 28th of august when we are still getting “news on the hardware”

Ok , so I guess I can stop checking my email everyday for the modem preference email .

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Same here. Been checking the website every morning to look for news & events :slight_smile:
Still, big bummer

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Being able to replace the battery easily is a must. Being able to replace the screen should be at least possible. For example, both is easy in the Fairphone 2.

I personally, do not care if it takes a little bit more space as long as I can replace the battery and screen. As @amosbatto pointed out a damaged screen and battery degradation are the top most common problems.

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It looks like it will be relatively easy to change the battery. It appears as though the rear cover can be removed without tools, and the battery contacts against sprung contacts.

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Easy as it gets. Last time I had them swapped like this was with GS3 and Note 4.
Can’t ask for more.
Great job

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Yes, it looks promising. I would love to see a very simple mechanism to replace the screen. Maybe similar to what Fairphone uses.

In general I would like to see Purism working together the company behind the Fairphone. Mainly, because both companies have expertise in different areas. Purism focuses on the software and privacy. The company behind the Fairphones focus on sustainability and the fair sourcing of parts for the phone.

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So if the battery is replaceable, what is the highest capacity available for purchase? Can I get a 6000 mAh battery in my Librem 5, even if it means the case bulges?

I’m pretty sure 3500mAh is the maximum available with the given dimensions, but maybe in a year you can buy 4000 in the same size?
For 6000 you would probably have to cut off the lower part of the back :stuck_out_tongue_winking_eye:

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Or 3D print a different back cover that accounts for the thicker battery :stuck_out_tongue_winking_eye:

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Or in some years batteries are more dense…? #thefutureisbright ?

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You say that as if that’s a joke, those things have been around for a while.

A few years ago they made third-party battery packs just like that, you didn’t even need to 3D print it yourself. Mine for the LG Optimus 2X looked like this.

Those 3500 mAh batteries were of crap quality though so the battery life was just slightly longer than the original which was a shame, would they be true 3500mAh the battery life would be phenomenal.

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Almost off topic here, but does anybody know if more used storage in the phone has an effect on how long a battery lasts on a single charge? I used to suspect that a phone was dying faster because I had a shitload of music in storage on the device.

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The joke was more aimed at @Caliga for saying to cut the back cover XD the 3D printing part I absolutely meant as a legit better suggestion than cutting up your phone :blush:

No, whether the bit in flash is set or cleared does not affect power consumption. Indexing lot of files - yes, so if player does not use smart indexing (eg incremental) it may book a bit more cpu cycles to walk through vast pile of music.
SD card though does affect battery as it’s yet another periphery. And if it does not use filesystem which supports suspend (eg btrfs) - it won’t allow to power-manage itself (by default it’s exfat).

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Years ago, I used to read about differences un electricity consumption based on how many 1s your RAM had to hold :smiley:.
To be honest, I don’t think the amount of data in your flash storage makes any difference. If you don’t insert an SD-card at all, yes, but how full it is? I would be rather surprised.

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Edit: Future readers: please read ruff’s reply and my next post. I didn’t think this through!

That must be true if the flash controller is blind to the meaning of the bits that the operating system gives it. It would just have to treat the entire capacity of the storage as one giant file, all of it important and needing to be carefully preserved, with no concept of empty or full; it is always full!

But operating systems can often tell the controller which bits represent useful data and which are free space (i.e. TRIM). So perhaps the controller could use that information in a way that affects power consumption. I have absolutely no idea if this is done in practice. I’m just speculating from abstract principles.

I share the hunch that any noticeable difference in power consumption probably comes from applications that read the files rather than from the actual storage of the files.

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Trim is a bit different, trim is like free() call in c - it just says - return the block of memory back to the pool of available (heap). It doesn’t touch the actual memory content. Similarly trim just marks the blocks as free in the flash overlay map. Which is the reason it is always warned - it’s not a secure delete, the content remains in the disk.
What does consume memory is flipping the bits (write) and checking their status (read). Assuming it is flash technology - writing a single bit may trigger zeroing of entire block and rewriting it. But again it’s part of write.
flash memory is nonvolatile - keeping the bit status is achieved by charge trap, that does not consume board memory (unlike RAM).

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Yes you’re quite right. Flash does not require energy to maintain the state of bits, being non-volatile. I have vastly over-stated the possibility that trimming could affect power consumption, forgetting that the memory does not need to be actively refreshed. Perhaps it can affect the power efficiency of some read and write operations, but the difference will be tiny.

I started out intending to make the point that, from the point of view of the hardware, there was no concept of being empty or full. Then I realised it’s more complicated than that with Flash and ended up confusing the matter! Should’ve thought more before opening my mouth! :face_with_hand_over_mouth:

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