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Part 3: They said a phone can’t run without a battery. Unfortunately, Pettyl didn’t get the memo. (lemmy.nz)
submitted 1 day ago* (last edited 1 day ago) by tradicije@lemmy.zip to c/selfhosted@lemmy.world
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This post is an update of the second part of my Moto server series: https://lemmy.zip/post/72142441

Rumor has it that keeping an 8-year-old phone permanently plugged in with its equally ancient Li-ion battery might not be the greatest idea ever conceived.

Some even claimed that a phone needs a battery to work.

Very negative people.

Anyway, I removed it.

Pettyl did not care.

nginx: UP PHP-FPM: UP MariaDB: UP WordPress: UP cloudflared: UP sshd: UP

The battery is currently sitting next to the phone, contributing absolutely nothing to the project.

Pettyl is now running entirely from USB power, at around 37°C, while continuing to serve the website like this is completely normal.

There is, however, one tiny detail the haters may enjoy:

It can’t boot without the battery.

So the official Pettyl disaster recovery procedure is now:

  1. Insert battery
  2. Boot Pettyl
  3. Connect USB power
  4. Remove battery
  5. Pretend this is enterprise infrastructure

The battery is no longer a battery.

It is the starter motor.

I see no problems with this architecture.

Anyway, Part 3 is going great.

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[-] tradicije@lemmy.zip 14 points 1 day ago

Update! Apparently removing the battery also removes half the CPU lol.

I’ll keep you posted!

[-] Axolotl_cpp@feddit.it 11 points 1 day ago* (last edited 1 day ago)

Usually phones have 3 pins on the back for the battery, one of them - usually the one at the center - reads the battery resistance, so if you add a resistor between that pin and another pin, it will fool the phone to belive it has a b~~e~~attery

Edit: spelling

[-] WhoIzDisIz@lemmy.today 8 points 1 day ago

Any idea what ohm value would be best?

[-] Axolotl_cpp@feddit.it 8 points 1 day ago

Nope, i think the ideal one changes with the phone manufacter, you should try to test the battery ohm value and use that one

this post was submitted on 26 Sep 2026
653 points (99.1% liked)

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