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X61 replacement battery woes

X60/X61 series specific matters only.
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GezzaF7
Posts: 3
Joined: Sat Jul 04, 2020 4:27 am
Location: Surrey, UK

X61 replacement battery woes

#1 Post by GezzaF7 » Sun Jul 05, 2020 7:02 am

Hi, I'm in the UK and I have a trusty X61 that I have had for a few years and has been upgraded over this time
(Middleton bios, 4Gb mem, SSD, Mini WiFi card, Win 10 - BTW, runs way cooler on this!).

Anyway, the battery is the thing that bugs me the most. It is an aftermarket 6 cell that now only holds 33% of
what it should. I've been looking for a 4 cell 2600MAH battery for a while now and was very pleased to see
some new/old stock Lenovo's 40Y7001's on UK ebay for £30 each! So I snapped one up.

Sadly, although both sealed and genuine, the battery I got was DOA. When installed in my X61 it just sat at '0' % charging,
with a blinking orange battery icon for 6 hours (tried different genuine lenovo chargers too). It had been manufactured in
June 2013, so perhaps it had just self discharged to below it's recovery threshold in storage.

So my quest for a good 2600 MAH 4 cell continues. I am doubtful whether I will find a genuine Lenovo 2600 MAH 4 cell 40Y7001
that wasn't either dead from storage or at the end of it's service life, so Aliexpress beckons...

I would love to be able to get a 'Kingsener' 4 cell battery for my X61, but they do not list one on on their site.
I have contacted them to enquire if an X61 battery is possible, awaiting reply, but not hopeful.

In the meantime, I have found two possible alternatives, that both claim to use Korean or Japanese cells,
and proport to be 2600 MAH:

'Emerging' sounds good, but I don't like the 'had to hammer it in' review comment:
https://www.aliexpress.com/item/3284221 ... 5011ZZb7gC

'HZHSD' seems to be the better gamble, it proports to be the same as a genuine Lenovo:
https://www.aliexpress.com/item/3284310 ... QRHdM&mp=1

Has anyone had any experience of these? what was the capacity and life like if so?

Also, have any X61 owner got any other good tips as to where to get a reputable 2600 MAH 4 cell X60/61 battery?
I'm in the UK, so any US supplier would be a non starter as the shipping costs would kill it. Are there any other reputable
Chinese manufacturers on Aliexpress that I should look at? if anyone can advise me where I could get a good,
solid, genuine 2600 MAH capacity X61 4 cell battery I would be very grateful.

Are there enough X61 owners out there interested in a 4 Cell 2600 MAh (or maybe more, with the improved
battery tech these days!) to discus some kind of group buy with Kingsener? I'd be in for one of those for sure!

Thanks, Gerry

GezzaF7
Posts: 3
Joined: Sat Jul 04, 2020 4:27 am
Location: Surrey, UK

Re: X61 replacement battery woes

#2 Post by GezzaF7 » Sat Aug 01, 2020 3:26 pm

*** UPDATE ***
Bought the "Emerging" one in the end, showing up as 31000 mah and power manager says it contains "Sanyo Cells".
Fitted well in my X61, no need to hammer it in :-) Doing a few charge/discharge tests at the moment,
but looks good for around 90 mins so far. Well pleased for a four cell at a reasonable ($23) price. Delivery was around 4 weeks.

xelonakias
Posts: 12
Joined: Wed Oct 14, 2020 2:39 am
Location: Athens, Greece

Re: X61 replacement battery woes

#3 Post by xelonakias » Thu Oct 15, 2020 4:33 am

It all comes down to what you need.
The form factor is the deciding fact. Be it a 4-cell form or an 8-cell form, you must first decide if you feel good with an extra bump or not.
A good 4-cell for 4000 mA should give in theory 90 min of uptime, but that depends so much on HDD vs SDD, screen light intensity, demands of the user, for instance usb dongles for mouses or wifi access when needed, that it is a moot point in my opinion.
Also I find mostly either 4-cell form factors giving 2200 mA for 18 to 30 euros, or 8-cell form factor batteries giving either 4400 mA or 5200 mA from 30 to 65 euros, depending on cell quality used in the build. Most cells are reported to be SANYO-made, Li type. Wanting to have my trusty typewriter available at all times during a flight, I packed a pair of 8 cell-form 4400 mA for 65 euros and I have been getting more or less 1hour and 30 min out of each once they are toped up.
Note that I do quite a lot to drain those as I can write for the entire flight (3 hours), check files residing on my phone and copy them over via BT, do some math calculus, and save multiple times. Also, the RAM is limited to 4GB which by necessity drags power from buffer SSD use by the OS.
You can see the battery report if it helps :

Battery report
COMPUTER NAME DESKTOPED-IFGI876
SYSTEM PRODUCT NAME LENOVO 7674D34
BIOS 7NETC2WW (2.22 ) 03/22/2011
OS BUILD 19041.1.amd64fre.vb_release.191206-1406
PLATFORM ROLE Mobile
CONNECTED STANDBY Not supported
REPORT TIME 2020-10-1512:06:40
Installed batteries
Information about each currently installed battery
BATTERY 1
NAME 92P1173
MANUFACTURER SANYO
SERIAL NUMBER 1701
CHEMISTRY LION
DESIGN CAPACITY 63,360 mWh
FULL CHARGE CAPACITY 47,390 mWh
CYCLE COUNT -
Recent usage
Power states over the last 3 days
START TIME STATE SOURCE CAPACITY REMAINING
2020-10-1212:11:30 Active AC 100 % 47,200 mWh
14:42:02 Suspended 100 % 47,200 mWh
16:19:59 Active AC 100 % 47,200 mWh
18:06:19 Suspended 100 % 47,200 mWh
2020-10-1310:54:47 Active AC 99 % 46,720 mWh
10:54:47 Active Battery 99 % 46,720 mWh
11:57:06 Active AC 10 % 4,660 mWh
22:38:24 Suspended 69 % 32,910 mWh
2020-10-1408:46:57 Active AC 69 % 32,910 mWh
09:16:00 Suspended 69 % 32,910 mWh
09:19:41 Active AC 100 % 47,390 mWh
11:37:57 Active Battery 99 % 46,940 mWh
11:44:51 Active AC 91 % 43,020 mWh
11:45:55 Active Battery 91 % 43,110 mWh
11:46:02 Active AC 91 % 43,080 mWh
11:46:27 Active Battery 91 % 43,140 mWh
12:41:08 Active AC 25 % 11,840 mWh
14:10:29 Suspended 63 % 29,900 mWh
16:40:29 Active Battery 89 % 42,320 mWh
17:44:33 Suspended 17 % 8,010 mWh
17:46:12 Active Battery 23 % 10,710 mWh
17:56:32 Active AC 15 % 7,040 mWh
20:52:21 Suspended 100 % 47,390 mWh
2020-10-1509:43:09 Active AC 100 % 47,390 mWh
11:42:37 Active Battery 100 % 47,280 mWh
12:06:36 Report generated Battery 79 % 37,650 mWh
Battery usage
Battery drains over the last 3 days
START TIME STATE DURATION ENERGY DRAINED
2020-10-1310:54:47 Active 1:02:18 89 % 42,060 mWh
11:37:57 Active 0:06:54 8 % 3,920 mWh
11:45:55 Active 0:00:07 - 30 mWh
11:46:27 Active 0:54:40 66 % 31,300 mWh
16:40:29 Active 1:04:03 72 % 34,310 mWh
17:46:12 Active 0:10:19 8 % 3,670 mWh
11:42:37 Active 0:23:58 20 % 9,630 mWh
Usage history
History of system usage on AC and battery
BATTERY DURATION AC DURATION
PERIOD ACTIVE CONNECTED STANDBY ACTIVE CONNECTED STANDBY
2019-10-22 - 2019-10-30 - - 14:20:42 -
2019-10-30 - 2019-11-08 - - - -
2019-11-08 - 2019-11-13 - - - -
2019-11-13 - 2019-11-19 - - 6:19:42 -
2019-11-19 - 2019-11-27 0:09:01 - 40:09:10 -
2019-11-27 - 2019-12-09 2:01:54 - 49:46:13 -
2019-12-09 - 2019-12-16 8:25:32 - 61:43:15 -
2019-12-16 - 2019-12-23 12:10:21 - 63:42:31 -
2019-12-23 - 2019-12-30 12:06:58 - 93:18:23 -
2019-12-30 - 2020-01-06 13:04:32 - 139:53:56 -
2020-01-06 - 2020-01-13 15:29:11 - 183:42:15 -
2020-01-13 - 2020-01-20 17:40:20 - 206:05:49 -
2020-01-20 - 2020-01-27 23:19:13 - 245:49:36 -
2020-01-27 - 2020-02-03 27:29:38 - 273:47:34 -
2020-02-03 - 2020-02-10 29:14:22 - 298:54:59 -
2020-02-10 - 2020-02-17 29:31:20 - 330:35:42 -
2020-02-17 - 2020-02-24 31:01:04 - 348:25:38 -
2020-02-24 - 2020-03-03 31:12:11 - 306:55:45 -
2020-03-03 - 2020-03-19 - - - -
2020-03-19 - 2020-03-23 24:12:15 - 208:26:56 -
2020-03-23 - 2020-04-06 23:34:12 - 193:50:04 -
2020-04-06 - 2020-04-13 20:15:59 - 191:22:39 -
2020-04-13 - 2020-04-20 20:52:26 - 182:02:35 -
2020-04-20 - 2020-04-27 21:57:17 - 195:35:28 -
2020-04-27 - 2020-05-04 29:44:40 - 232:39:26 -
2020-05-04 - 2020-05-11 3:58:01 - 14:34:27 -
2020-05-11 - 2020-05-18 38:20:33 - 269:01:19 -
2020-05-18 - 2020-05-25 37:03:39 - 245:22:12 -
2020-05-25 - 2020-06-08 36:59:29 - 201:55:41 -
2020-06-08 - 2020-06-15 29:49:34 - 164:41:05 -
2020-06-15 - 2020-06-22 32:47:50 - 163:10:17 -
2020-06-22 - 2020-07-05 0:20:36 - 0:36:53 -
2020-07-05 - 2020-07-06 - - 0:27:50 -
2020-07-06 - 2020-07-22 12:13:30 - 35:09:12 -
2020-07-22 - 2020-07-27 1:17:20 - 4:20:49 -
2020-07-27 - 2020-08-03 - - 0:01:35 -
2020-08-03 - 2020-08-10 - - - -
2020-08-10 - 2020-08-17 - - - -
2020-08-17 - 2020-08-24 - - - -
2020-08-24 - 2020-08-31 - - - -
2020-08-31 - 2020-09-07 0:47:37 - 10:17:13 -
2020-09-07 - 2020-09-14 1:33:37 - 26:34:57 -
2020-09-14 - 2020-09-21 0:32:01 - 13:44:16 -
2020-09-21 - 2020-09-28 3:54:37 - 20:04:00 -
2020-09-28 - 2020-10-05 1:48:22 - 5:25:23 -
2020-10-05 - - 0:35:28 -
2020-10-06 0:00:08 - 0:32:10 -
2020-10-07 - - 1:06:39 -
2020-10-08 - - 1:37:47 -
2020-10-09 0:00:56 - 3:53:19 -
2020-10-10 0:25:32 - 3:55:02 -
2020-10-11 1:33:24 - 9:16:32 -
2020-10-12 0:00:18 - 6:30:15 -
2020-10-13 1:01:25 - 4:23:31 -
2020-10-14 1:53:48 - 5:33:18 -
Battery capacity history
Charge capacity history of the system's batteries
PERIOD FULL CHARGE CAPACITY DESIGN CAPACITY
2019-10-22 - 2019-10-30 52,420 mWh 74,880 mWh
2019-10-30 - 2019-11-08 52,420 mWh 74,880 mWh
2019-11-08 - 2019-11-13 52,420 mWh 74,880 mWh
2019-11-13 - 2019-11-19 52,420 mWh 74,880 mWh
2019-11-19 - 2019-11-27 52,420 mWh 74,880 mWh
2019-11-27 - 2019-12-09 52,620 mWh 74,646 mWh
2019-12-09 - 2019-12-16 52,964 mWh 73,438 mWh
2019-12-16 - 2019-12-23 52,550 mWh 71,744 mWh
2019-12-23 - 2019-12-30 53,800 mWh 69,079 mWh
2019-12-30 - 2020-01-06 54,453 mWh 68,222 mWh
2020-01-06 - 2020-01-13 54,676 mWh 65,601 mWh
2020-01-13 - 2020-01-20 54,749 mWh 64,382 mWh
2020-01-20 - 2020-01-27 54,037 mWh 62,503 mWh
2020-01-27 - 2020-02-03 52,925 mWh 61,428 mWh
2020-02-03 - 2020-02-10 52,780 mWh 61,553 mWh
2020-02-10 - 2020-02-17 51,699 mWh 61,378 mWh
2020-02-17 - 2020-02-24 52,138 mWh 61,389 mWh
2020-02-24 - 2020-03-03 50,857 mWh 61,250 mWh
2020-03-03 - 2020-03-19 36,970 mWh 63,360 mWh
2020-03-19 - 2020-03-23 45,351 mWh 62,064 mWh
2020-03-23 - 2020-04-06 46,432 mWh 63,122 mWh
2020-04-06 - 2020-04-13 46,221 mWh 62,153 mWh
2020-04-13 - 2020-04-20 45,517 mWh 61,604 mWh
2020-04-20 - 2020-04-27 45,515 mWh 61,226 mWh
2020-04-27 - 2020-05-04 47,340 mWh 60,177 mWh
2020-05-04 - 2020-05-11 36,080 mWh 63,360 mWh
2020-05-11 - 2020-05-18 46,317 mWh 60,803 mWh
2020-05-18 - 2020-05-25 46,708 mWh 60,767 mWh
2020-05-25 - 2020-06-08 46,008 mWh 60,445 mWh
2020-06-08 - 2020-06-15 46,390 mWh 62,229 mWh
2020-06-15 - 2020-06-22 48,340 mWh 59,428 mWh
2020-06-22 - 2020-07-05 51,230 mWh 63,360 mWh
2020-07-05 - 2020-07-06 51,230 mWh 63,360 mWh
2020-07-06 - 2020-07-22 52,490 mWh 59,750 mWh
2020-07-22 - 2020-07-27 54,690 mWh 45,330 mWh
2020-07-27 - 2020-08-03 54,690 mWh 44,000 mWh
2020-08-03 - 2020-08-10 54,690 mWh 44,000 mWh
2020-08-10 - 2020-08-17 54,690 mWh 44,000 mWh
2020-08-17 - 2020-08-24 54,690 mWh 44,000 mWh
2020-08-24 - 2020-08-31 54,690 mWh 44,000 mWh
2020-08-31 - 2020-09-07 54,690 mWh 53,411 mWh
2020-09-07 - 2020-09-14 54,690 mWh 62,123 mWh
2020-09-14 - 2020-09-21 53,912 mWh 63,360 mWh
2020-09-21 - 2020-09-28 52,180 mWh 44,184 mWh
2020-09-28 - 2020-10-05 51,361 mWh 58,140 mWh
2020-10-05 51,060 mWh 63,360 mWh
2020-10-06 51,060 mWh 63,360 mWh
2020-10-07 51,060 mWh 63,360 mWh
2020-10-08 51,060 mWh 63,360 mWh
2020-10-09 51,060 mWh 63,360 mWh
2020-10-10 51,060 mWh 63,360 mWh
2020-10-11 50,726 mWh 61,599 mWh
2020-10-12 47,390 mWh 44,000 mWh
2020-10-13 47,390 mWh 44,000 mWh
2020-10-14 47,390 mWh 44,000 mWh
Battery life estimates
Battery life estimates based on observed drains
AT FULL CHARGE AT DESIGN CAPACITY
PERIOD ACTIVE CONNECTED STANDBY ACTIVE CONNECTED STANDBY
2019-10-22 - 2019-10-30 - - - -
2019-10-30 - 2019-11-08 - - - -
2019-11-08 - 2019-11-13 - - - -
2019-11-13 - 2019-11-19 - - - -
2019-11-19 - 2019-11-27 0:11:04 - 0:15:49 -
2019-11-27 - 2019-12-09 0:46:49 - 1:06:24 -
2019-12-09 - 2019-12-16 1:23:20 - 1:55:33 -
2019-12-16 - 2019-12-23 1:32:04 - 2:05:41 -
2019-12-23 - 2019-12-30 1:44:05 - 2:13:39 -
2019-12-30 - 2020-01-06 1:44:06 - 2:10:25 -
2020-01-06 - 2020-01-13 1:42:01 - 2:02:24 -
2020-01-13 - 2020-01-20 1:36:44 - 1:53:45 -
2020-01-20 - 2020-01-27 1:45:26 - 2:01:57 -
2020-01-27 - 2020-02-03 1:42:01 - 1:58:24 -
2020-02-03 - 2020-02-10 1:38:49 - 1:55:15 -
2020-02-10 - 2020-02-17 1:34:00 - 1:51:36 -
2020-02-17 - 2020-02-24 1:35:27 - 1:52:23 -
2020-02-24 - 2020-03-03 1:31:57 - 1:50:44 -
2020-03-03 - 2020-03-19 - - - -
2020-03-19 - 2020-03-23 1:21:12 - 1:51:07 -
2020-03-23 - 2020-04-06 1:22:05 - 1:51:35 -
2020-04-06 - 2020-04-13 1:22:03 - 1:50:20 -
2020-04-13 - 2020-04-20 1:23:21 - 1:52:49 -
2020-04-20 - 2020-04-27 1:25:22 - 1:54:51 -
2020-04-27 - 2020-05-04 1:25:12 - 1:48:18 -
2020-05-04 - 2020-05-11 1:05:44 - 1:55:26 -
2020-05-11 - 2020-05-18 1:23:27 - 1:49:33 -
2020-05-18 - 2020-05-25 1:28:39 - 1:55:21 -
2020-05-25 - 2020-06-08 1:26:01 - 1:53:01 -
2020-06-08 - 2020-06-15 1:23:35 - 1:52:07 -
2020-06-15 - 2020-06-22 1:29:09 - 1:49:36 -
2020-06-22 - 2020-07-05 1:42:03 - 2:06:13 -
2020-07-05 - 2020-07-06 - - - -
2020-07-06 - 2020-07-22 1:48:25 - 2:03:25 -
2020-07-22 - 2020-07-27 1:28:22 - 1:13:14 -
2020-07-27 - 2020-08-03 - - - -
2020-08-03 - 2020-08-10 - - - -
2020-08-10 - 2020-08-17 - - - -
2020-08-17 - 2020-08-24 - - - -
2020-08-24 - 2020-08-31 - - - -
2020-08-31 - 2020-09-07 1:28:54 - 1:26:49 -
2020-09-07 - 2020-09-14 1:39:09 - 1:52:38 -
2020-09-14 - 2020-09-21 1:03:30 - 1:14:38 -
2020-09-21 - 2020-09-28 1:28:18 - 1:14:46 -
2020-09-28 - 2020-10-05 2:00:51 - 2:16:49 -
2020-10-05 - - - -
2020-10-06 1:37:15 - 2:00:41 -
2020-10-07 - - - -
2020-10-08 - - - -
2020-10-09 1:43:36 - 2:08:33 -
2020-10-10 2:34:17 - 3:11:27 -
2020-10-11 1:43:24 - 2:05:33 -
2020-10-12 1:49:21 - 1:41:32 -
2020-10-13 1:09:44 - 1:04:45 -
2020-10-14 1:21:10 - 1:15:21 -
Current estimate of battery life based on all observed drains since OS install
Since OS install 1:26:33 - 1:20:22 -


I would always get the biggest battery I can find just to be able to keep working at my own leisure. Should you need a lighter machine though, the 4-cell design is the way to go, just do not hope to squeeze more than an hour top top out of it, with a restrained use. I would advise for green cell manufacturers if you can get thos in the UK. Or you can shop over here in Greece if you feel like it. I often try and find shops abroad and pay the postal price in the EU if I cannot get what I need next door or in-country.
See size vs duration. Also if you skip win 10 for a linux or FreeDos install, should your needs be such, you can milk this battery for almost 20% more. On Win 10 try and kill everything online-worthy, it is a battery devourer.
Cheers

atagunov
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Re: X61 replacement battery woes

#4 Post by atagunov » Thu Oct 15, 2020 4:48 am

MANUFACTURER SANYO
I have this on my KingSener batt for X230 too. Don't think it means anything. It's just a string of characters battery firmware sends to Thinkpad. Probably they copied firmware byte to byte from a Sanyo made bettery but more likely they wanted to avoid trouble with Lenovo code running in Embedded Controller (EC) and Lenovo drivers/utilities running on the main CPU as part of the OS. Probably with BIOS too. So they set this string to match as closely as possible to what some original battery returns. Don't think it is linked to the brand of the cells at all, even if they happen to be Sanyo :)

But it doesn't matter! What matters is that battery works well. Could you please share which aftermarket "brands" you prefer? Specific sellers on Aliexpress or eBay? Thx!
Last edited by atagunov on Thu Oct 15, 2020 6:01 am, edited 4 times in total.
X220, 2 *T520

RealBlackStuff
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Re: X61 replacement battery woes

#5 Post by RealBlackStuff » Thu Oct 15, 2020 5:40 am

You should get 2x4GB=8GB RAM, preferably PC2-6400.
It will be better for the X61 battery!
NOT a great day for a Guinness! (the Real Black Stuff).
Ireland is on FULL lockdown till December 2020!
Covid-19: Mask it or Casket!
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xelonakias
Posts: 12
Joined: Wed Oct 14, 2020 2:39 am
Location: Athens, Greece

Re: X61 replacement battery woes

#6 Post by xelonakias » Thu Oct 15, 2020 6:26 am

atagunov wrote:
Thu Oct 15, 2020 4:48 am
MANUFACTURER SANYO
I have this on my KingSener batt for X230 too. Don't think it means anything. It's just a string of characters battery firmware sends to Thinkpad. Probably they copied firmware byte to byte from a Sanyo made bettery but more likely they wanted to avoid trouble with Lenovo code running in Embedded Controller (EC) and Lenovo drivers/utilities running on the main CPU as part of the OS. Probably with BIOS too. So they set this string to match as closely as possible to what some original battery returns. Don't think it is linked to the brand of the cells at all, even if they happen to be Sanyo :)

But it doesn't matter! What matters is that battery works well. Could you please share which aftermarket "brands" you prefer? Specific sellers on Aliexpress or eBay? Thx!
Sorry,
I actually buy my batteries in-country most of the time. I almost never use Ali or ebay, since I care mostly about being able to give a phone call to request servicing if needed. It probably costs me more than getting them from China but that is just me.
For instance: https://computron.gr/default/battery-ib ... -1541.html
I usually get green cells maker if I can get one. Money is a question of cell quality. Issue with most chinese manufacturers is that capacity is really a pure nominal issue. I have seen a cheap 20 euro battery last me for two hours and a 60 euro battery dying on me after one month of use on the same machine. So I prefer to go with local shops that give me a year warranty and exchange it for a new one. If I have no issue in a month, usually the batteries are good to go.
Batteries are a painful thing really, since there are so many duds out there, and the worst issue are cell quality and electronics build quality inside, which you can never know about, in essence you are always buying a black box.
For me, if I NEED to work with a battery, I go the full monty about it, spending-wise, since I consider worst to be dead in the water without power. Otherwise, it is just a matter of having the battery as an add-on for the comings and goings from one room to another, and then even a small 20 min worth of battery can last you years of use. Plug the AC out change rooms, plug it in, then sit and continue...Or just get up, show the screen to the people in next room, then return.
I have no real preference. Usually I buy one, ask the vendor if he has the same batch in stock, then test the one I got, and if happy, will get another one. I am presently juggling 8 batteries on various machines just to keep them alive.
Also if I really have to, there are pretty good battery refurbishers around here, pricey, but they can make what I need if needed.
Hope this helped some.
Last edited by xelonakias on Thu Oct 15, 2020 6:38 am, edited 1 time in total.

atagunov
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Re: X61 replacement battery woes

#7 Post by atagunov » Thu Oct 15, 2020 6:38 am

xelonakias wrote:
Thu Oct 15, 2020 6:26 am
I usually get green cells maker if I can get one
Ah GreenCell is actually available in UK on Amazon, a bit pricey but it's available. How's your experience with them generally? Have you ever seen a GreenCell that was bad?
xelonakias wrote:
Thu Oct 15, 2020 6:26 am
So I prefer to go with local shops that give me a year warranty and exchange it for a new one
Wow! I wish I had a shop like that :) I would have been purchasing there too
X220, 2 *T520

xelonakias
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Location: Athens, Greece

Re: X61 replacement battery woes

#8 Post by xelonakias » Thu Oct 15, 2020 6:42 am

atagunov wrote:
Thu Oct 15, 2020 6:38 am


Ah GreenCell is actually available in UK on Amazon, a bit pricey but it's available. How's your experience with them generally? Have you ever seen a GreenCell that was bad?

Actually I have never as yet had a problem with Green Cell, but remember, in China it is always a matter of the given batch of production...Caveat emptor! More expensive is not always a warranty!

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