How is your Thinkpad Sanyo battery holding up?

My Sanyo 9-cell just died last week. I push my batteries pretty hard, so wasnt suprised that it kicked the bucket just over a year after first use.

Manufactured Date: 2008-09-10
Remaining Capacity: 49.77Wh
Full Charge Capacity: 50.64Wh
First Used Date: 2009-05
Cycle Count: 356
Design Capacity: 84.24Wh

 

@miner you got pretty good use out of that.

 

here is mine for the 9 cell.

manufactured date: 2010-07-06
first used date: 2010-07
designed capacity: 93.24 Wh
full charge capacity: 89.73 Wh
cycle count: 32

 

Hm... I didn't realize my X200's batt(6-cell) was a Sanyo, as well.

Manufacture Date: 19 November 2008
First Used: January 2009
Cycle Count: 176
Full Charge capacity: 43.71 W/h
Design Capacity: 56.16 W/H

I'm prolly due for a replacement fairly shortly, I think.

 

And you normally use power manager as your battery meter? Or do you use a Windows meter?

I've never had the Lenovo meter be inaccurate after a calibration. Sounds like somethings going out on that battery pack. Maybe 1 or 2 of the cells are bad.

 

Yeah, it did but on the other hand of all the previous batteries I have used, it lasted the shortest. Most of my HP laptops also had Sanyo batteries and they lasted the life of the laptop with me (2+ years with the usual degradation).

In any case, placed an order for a replacement from the lenovo outlet store for a 9-cell. Its a S&D, hopefully it has been reconditioned enough to last me another year!

 

Panasonic battery from my T40 is still working, while it is only holding 40% of its original charge but it is still going strong none the less.

 

Thanks for this thread. Where you guys obtaining the battery stats that you post? Is it from Power Manager and thanks.

Gary

 

yeah the battery tab of the power manager. though if i could remember correctly, some of the stats you can get only when plugged in or when on battery.

 

Bump for interesting thread.

Manufacture Date: 2009-5-25
First Used: 2009-7
Cycle Count: 390
Full Charge capacity: 28.39 W/h
Design Capacity: 56.16 W/H
Battery condition: good

Number of resets: 5 or less over the life of battery.

 

Manufacture name: Sanyo
Manufacture date: 2009-04-14
Cycle Count: 10
Full Charge Capacity: 45.90 Wh
Remaining Capacity: 40.71 Wh
Design Capacity: 47.52

Not too shabby

 

i plotted it!

Does something seem wrong with this:

 

so what is the independent variables on the graph, no. of cycles?

The data used are somewhat inaccurate, since they are variations in usage pattern of battery, the age of battery, storage temperature, charge time and most importantly batch variations.

But i think it is a good starting point for future project, i will have a closer look at my Sanyo batteries and monitor their rate of battery degradation as the cycles stack up.

 

I have a sanyo. 49.60/56.16 = 88% at 98 cycles and 1.5 years old. I keep my battery around 40% when I don't need to be unplugged, and I rarely charge it past 75%. When I first started with this battery, the actual capacity read about 59 whr. Considering my, what I think is, above average care for the battery, you'd think its capacity would be dropping at a slower rate than this. Its current voltage is 11.65 V at 34% charge. Isn't that high? Any voltage comparisons with other sanyos and other battery brands?

 

i would recommend that you do use the battery reset function once every two months. Also, Sanyo batteries are not the best in the world, so by keeping it in the state of narrow charge windows, is not going to significantly increase the battery longevity.

 

It's simply % of capacity remaining vs. cycles.

Comparisons? Look at my graph! 98 cycles should be about 83%, so you are ahead of the typical performance.

 

The datapoints near the beginning are all over the place. But I guess the R^2 value isn't that bad for the regression.

lead_org, I do believe my narrow charge window and leaving the battery at a low state of charge are good for my battery. I'm not sure if I understand the purpose of battery resets. I have never done one. It seems to charge your battery up to full, ask you to discharge the battery down to 5%, and then recharge the battery up to full. I am not sure how it helps anything. The max capacity of my battery changes to a new value every time I charge it up to 100% anyway.

 

My friends Sanyo died at 333 cycles. He always had it plugged in..

 

My T400 with 9cell Sanyo was delivered to my mother's december 2009. Got it from my mother march 2010. I remember the battery being a little over the "Design capacity" of 84.24Wh when I got it.

Since then, "Full charge capacity" has been:
june 8, 2010 = 82.28Wh
july 14, 2010 = 80.36Wh
sept 17, 2010 = 75.36Wh
oct 6, 2010 = 73.57Wh
dec 8, 2010 = 68.89Wh

Yesterday I performed a Battery guage reset:
Full charge capacity: 81.62Wh
Manufacture date: 2009-11-25
First used date: 2009-12
Design capacity: 84.24wh

81.62/84.24 * 100 = 96.88%

 

FYI, my battery (6 cell x200) exceeded the design capacity for months. perhaps nearly a year, before it finally started dropping. Interesting that no data points in this thread reflect anything similar.

 

This is quite common. I've had several batteries where the remaining capacity was higher than the design capacity as well

 

most of the new batteries i have seen that shipped with thinkpads in the recent years had actual charge level higher than design level, but they drop off relatively quickly.

 

My R400 had initially charge level 4w higher than design capacity but came down within month or so despite it having at that moment only 3-4 cycles and only one of them was real close to full discharge and charge.
Didnt do any reset on it tho.

 

I'm not the biggest fan of these Sanyo batteries. Since my last post here, I have another broken Sanyo 9 cell from my dad's T400 to report. Here are the specs on it. Still holds some charge but way past its prime...

Full Charge Capacity: 33.10Wh
Cycle Count: 288
Manufacturer Name: SANYO
Manufacture Date: 2008-09-08
First used Date: 2008-09
Design Capacity: 84.24Wh

Replaced this one with a 4 cell manufactured by Sony.

Also, the replacement for my Sanyo 9 cell was another 9 cell from Panasonic. Lenovo outlet had these for $40...too good to pass out even for refurbished ones (SnD).

 

It is properly read out from battery manager. I haven't ever done a battery reset, as I'm certain it's the same thing happening when I use my laptop untill it's completely drained and it turns off by itself.

I'm now down to ->
Full charge capacity 39.33->38.80 Wh
Number of cycles 488->585
Production date 02-04-2008
First used 05-2008
Original capacity 43,20

The (Sony) bay battery on the other hand is down to 59 % capacity after 418 cycles. I believe it gets worn more since it's first discharged completely before the main battery starts to be used. This might also be influential to why my main battery is doing so well.

 

Apologies for the bump, but when this thread was active, I felt that I didn't have my ThinkPad long enough to share any useful information on my 6 cell Sanyo battery.

ThinkPad x200, P8600 2.40 GHz, 4.00 GB RAM
Full charge capacity: 49.38 Wh
Cycle count: 93
Manufacture date: 2009-12-19
First used date: 2010-07
Design capacity: 56.16 Wh

So I have about 87.9% of the original charge capacity left after using it since July 2010. I bring this up because I feel like my battery is draining a little too fast. Just last night I used it for about an hour on Microsoft Word with wi-fi off and screen brightness all the way down, occasionally turning it up to show a classmate my work. The battery drained from 82% to 53%. Perhaps I'm being unreasonable, but I feel that losing 29% of my charge in one hour of working on a word document is pretty bad. And as I speak, it has drained from 52% to 42% in about 20 minutes of wi-fi browsing at screen brightness of 3.

Is this normal for a battery that has been used for about 10 months? And if it's relevant, I've only done one battery re-calibration about 4-5 months ago and I've been using the battery maintenance charge options for about 9.5 months (it's currently set at 40% to 85%).

 

@meemer
Yours seems more of a power consumption issue rather than a battery issue. Usually caused by excessive CPU/disk activity or improperly configured power management settings.

 

@Colonel O'Neill

I don't think it's a power management problem. It was like that when I had PM 3.25 and now when I upgraded to version 3.48. I've also uninstalled it and re-installed it. That leaves the cpu/disk activity explanation, which of course begs the question as to what could be causing it. I'm running off a Windows 7 Pro 64-bit clean install from August and the only resource heavy program I run on a daily basis is Firefox.

 

Main 6 cell battery:

Manufacture date: 2010-02-22
First used date: 2010-04
Design capacity: 56,16 Wh
Full charge capacity: 48,57 Wh
Cycle count: 283

9 cell slice battery:

Manufacture date: 2010-04-07
First used date: 2010-05
Design capacity: 93,24 Wh
Full charge capacity: 88,51 Wh
Cycle count: 293

Always used "Automatically optimize for battery lifespan" option.
Never calibrated them. Seems to hold up pretty good.

 

My original Sanyo 6 cell battery on my T61 has gone down really badly now, its original capacity was 56.16Wh but it's now 38.12Wh (67% of original) with 231 cycles. It can barely last 1.30 hours on a full charge now!

Plus side is I got a brand new spare lying around, down side is that it's the same Sanyo 6 cell!

 

At 145 cycles, 54.32/56.16.
I did a battery reset a month or two ago.

 

under the battery maintainence section, what happens if i select "optimise for battery lifespan, automatically change for me"?
does this mean it wont fully charge? what if im planning to take it on the road in a while and want to get a full charge?

 

then temporarily switch the power plan to fully charge or do it manually with battery thresholds.

 

How long does your 6 cell last unplugged and what CPU do you have? I'm wondering if it drains as fast as my x200 w/ C2D does.

 

Did a test today and from 100-10% it lasted roughly 2 h 12 min. Brightness was on 13 and I did some light surfing and streamed music. Took some short rests so screen was blank a few minutes.

Processor is Core i5 430M

 

After 103 cycles, my battery discharges from 84% to 44% in about 2.5 hours/150 minutes. Can anyone comment on whether this sounds like an acceptable battery life for a 6 cell on a Core 2 Duo for wi-fi browsing on 3/15 screen brightness? Maybe it's just me, but it seems like it's draining a little too fast.

 

More than acceptable IMO.

 

Just thought I'd add an update on the Sanyo battery in my x200. The full charge capacity is now at 44.13 Wh from its original 56.16 Wh after 142 cycles. With wi-fi on I can get about 3 hours from 95% to about 45%. With wi-fi off I can usually add another hour or so.

Manufacture date 2009-12-19, first used 2010-07. Battery gauge has been reset once or twice.

 

My extended slice battery is Sony, but my primary battery that slots into the back of the laptop is a Sanyo.

Are any of the 6 cell primary batteries made by Sony... I have a spare new cell but I don't want to open it just to find out it is in all probability a Sanyo.

 

@tomartomau, which machine are we talking about here?

 

Sorry X220T

 

I think there should also be a Sony celled one, and a LG celled one.

 

My Primary Battery is definately a Sanyo and the Second (extended slice) is a Sony.

I have decided to sell the unused battery on ebay as I think that I have enough battery power for most of my needs.

 

Sorry i missed the word 'also' in my previous response. So basically i am saying that there should also be a Sony and LG celled battery in addition to the Sanyo one.

 

My 1st Z61t has only 20 charge cycles on it (considering it was a refurbished one, I think that is pretty amazing) and only 6% charge wear on it. 2nd Z61t has 15 charge cycles on it and 5% charge wear. My T410s has only 9 charge cycles, but already has 10% charge wear and is out of battery warranty.

 

So T410s is dropping out of your favourite list and X series is creeping up on the need to purchase agenda?

 

I got a Sanyo in my W520 too. =/
Haven't put it through many cycles though.
Does anyone have a Panasonic celled one in the Sandy Bridge generation?

 

My T420s main battery is Panasonic and, so far, seems to be OK but it's only at 15 charge cycles / 5 months. The Sony UltraBay II battery has being doing most of the work and has reached 32 cycles, again without any problems.

John

 

Yup looking to trade for an x series tablet hopefully.

Seems like I always get bad luck with laptop batteries and get Sanyo. My only Panasonic battery has been my T60's battery and my Pentium 2 Toshiba notebook (still holds a 30 minute charge).

 

Main 6 cell battery on my X220 (I7, 160GB SSD, 8GB)

Manufacturer name: Sanyo
Manufacture date: 2011-04-24
First used date: 2011-05-05
Design capacity: 62.16 Wh
Full charge capacity: 64.23 Wh
Cycle count: 98

Last reset done last week.