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X220 battery at 0% and not charging, battery or charging circuit problem? [SOLVED]

X200/X201/X220 (including equivalent tablet models) and X300/X301 Series
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humble1337
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Location: Zaragoza, Spain

X220 battery at 0% and not charging, battery or charging circuit problem? [SOLVED]

#1 Post by humble1337 » Sat Nov 20, 2021 6:01 pm

Hello, I recently purchased a X220 from ebay. It has a Lenovo battery (42T4865) but only works when it is plugged with the AC adapter (90W). Windows says the battery is "charging" but it's always stuck at 0%, no matter how long it's plugged. Hwinfo says:

Code: Select all

General Properties:
[...]
Designed Capacity: 68998 mWh
Full Charged Capacity: 52181 mWh
Wear level: 24.4%

Current Power Status:
Power Status: Critical on AC Power
Current Capacity: 0 mWh
Current Voltage: 2.353 V
If I unplug the cord, PC turns off immediately. The computer recognizes the battery, because Windows detects between battery off and battery "charging". I looked for similar problems in this forum and on the Internet in general, I did the usual things consisting in taking the battery off and pressing the power on button for 30 secs, looking for driver updates, etc. Nothing of these worked.

I'd like to discern if it is a battery or a charging circuit problem. What's the easiest way to know this? I suppose that if the battery is dead, it's not possible to recover it (except through some eeprom flashing approach that's out of my current electronics understanding level). I'm also trying to solve this with the vendor, since he assured me that battery only had a wear level of 24.4%, which was very good, etc. but, in any case, I'd like to solve the problem and enjoy my new computer. Thank you very much.
Last edited by humble1337 on Tue Nov 23, 2021 1:45 pm, edited 2 times in total.

axur-delmeria
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Re: X220 battery at 0% and not charging, battery or charging circuit problem?

#2 Post by axur-delmeria » Sun Nov 21, 2021 12:44 am

Looks like a battery problem to me. Is it supposed to be a new battery? The 24% wear level says otherwise.
Daily driver: X220 4291-C91 i7-2620M

Backup: X601 Core 2 Duo T8100
Toy: X60F Core Solo U1300
On loan: X220 4291-P79 i5-2520M
In pieces: two retired but working X61Ts
RIP: 760XD 9546-U9E; X61 7676-A24; and a BOE-Hydis HV121P01-100 in failed SXGA+ mod
:cry:

BillMorrow
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Re: X220 battery at 0% and not charging, battery or charging circuit problem?

#3 Post by BillMorrow » Sun Nov 21, 2021 1:48 am

axur-delmeria wrote:
Sun Nov 21, 2021 12:44 am
Looks like a battery problem to me. Is it supposed to be a new battery? The 24% wear level says otherwise.
agree..
Bill Morrow, kept by parrots :parrot: & cockatoos
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She was not what you would call refined,
She was not what you would call unrefined,
She was the type of person who kept a parrot.
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humble1337
Posts: 3
Joined: Sat Nov 20, 2021 5:25 pm
Location: Zaragoza, Spain

Re: X220 battery at 0% and not charging, battery or charging circuit problem?

#4 Post by humble1337 » Sun Nov 21, 2021 4:58 am

Thank you very much for your answers.
axur-delmeria wrote:
Sun Nov 21, 2021 12:44 am
Looks like a battery problem to me. Is it supposed to be a new battery? The 24% wear level says otherwise.
The battery came with the laptop. No, it's not new. I was thinking about buying a new one, but I wanted to assure where the problem was in order to not waste money... Besides, I purchased a T420 too, with a wear level of 45% and it's working perfectly with the same AC adapter. Although I suppose that batteries may 'die' with different wear levels.

I wanted to know... does the measured 'current battery voltage', being equal to 2.35V, say anything regarding the charging circuit? Shouldn't it be around 11V with the laptop plugged?

And, if it's indeed a battery problem, and I purchase another, should it be Lenovo branded or it's not that important?

Again, thank you very much for your time.

axur-delmeria
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Posts: 3089
Joined: Mon May 28, 2012 5:49 am
Location: Metro Manila, Philippines

Re: X220 battery at 0% and not charging, battery or charging circuit problem?

#5 Post by axur-delmeria » Sun Nov 21, 2021 6:31 am

A battery voltage of 2.35v is dead, for all intents and purposes. The minimum safe voltage for a 6-cell battery pack should be 9v (maybe even higher depending on the cut-off voltage set in the battery's protection circuitry.
Daily driver: X220 4291-C91 i7-2620M

Backup: X601 Core 2 Duo T8100
Toy: X60F Core Solo U1300
On loan: X220 4291-P79 i5-2520M
In pieces: two retired but working X61Ts
RIP: 760XD 9546-U9E; X61 7676-A24; and a BOE-Hydis HV121P01-100 in failed SXGA+ mod
:cry:

humble1337
Posts: 3
Joined: Sat Nov 20, 2021 5:25 pm
Location: Zaragoza, Spain

Re: X220 battery at 0% and not charging, battery or charging circuit problem?

#6 Post by humble1337 » Tue Nov 23, 2021 1:38 pm

I bought a cheap Chinese battery that came today and... it works!!

So, that it was. Thank you very much!

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