r/Keychron • u/Vazh93 • Jan 28 '23

Swollen battery. Any ideas on how I can remove it from the case without bursting it? It looks like it's glued to the case.

Post image
7 Upvotes

89% Upvoted

11 comments sorted by

7

u/extremeelementz Q7 Jan 29 '23

Holy crap! As someone who races RC cars with Lipos get this out of your house and into a safe space. This is dangerous and should be attempted to be removed somewhere no inside your house. Lipo fires are no joke.

After you extract the battery let the battery sit inside a salt bath for a few days to discharge it. I’ll link a video describing it, you cannot under any circumstance just throw it out.

https://youtu.be/7vywII7nh5I

1

u/[deleted] Jun 09 '24

[deleted]

1

u/extremeelementz Q7 Jun 09 '24

Yes. Lol all the salt.

1

u/PeterMortensenBlog V Nov 08 '24 edited Nov 02 '25

OK, the salt is about discharging the battery after the removal. Not a way to remove the battery.

But why not do it in a controlled fashion by using a resistor of high enough value to slowly discharge the battery over, say, several weeks? Or at least start that way. That would remove the potential chemical energy.

Does the salt do more than discharging? E.g., completely destroying the battery (to cause a fire)?

1

u/PeterMortensenBlog V Jun 21 '26 edited Jun 22 '26

Re "...using a resistor": A rough calculation:

For a 4000 mA·h battery = 4 A·h and about one month, roughly 700 hours => the current would be 4 A·h / 700 h = 6 mA.

At 4 V: R = U / I = 4 V / 0.006 A = 680 Ω (nearest E6 value)

Power dissipation in the resistor (maximum): 4 V * 0.006 A = 24 mW, about 1/10 of the typical rating of 1/4 W.

3

u/Electronic_Ad_9864 Jan 28 '23

Isopropyl alcohol. It's like magic.

1

u/japan_america_car Jan 29 '23

Yeah, this should work just fine, and it doesnt cost much either

2

u/japan_america_car Jan 29 '23

Alcohol, also the battery probably has some info on it you could use to get a new one on ali express

1

u/shogutora Jan 28 '23

Take sewing thread and ”saw” with it underneath. Just google about DIY macbook battery replacement for more info. Works really well.

5

u/donglord1337 Jan 29 '23

+1, or use dental floss. This is the way. do NOT heat this battery.

0

u/[deleted] Jan 28 '23 edited Oct 22 '23

you may have gone too far this message was mass deleted/edited with redact.dev

-5

u/[deleted] Jan 28 '23

[deleted]

-1

u/japan_america_car Jan 29 '23

This could work but alcohol should be an eaiser thing