T43 Freezes only on New Battery Power

[spb_24]

HI Gurus, I have a T43 1871 FU1 Model which is working fine so far. Recently my Original Battery is seems to be very weak, i thought to purchase a new battery. First tried with Lenovo, i heard that there are no battery replacements available for these models. Then i purchased an AGPTEK (Sanyo) Battery from Amazon.

Battery Details: Status :  No Activity / Remaining Percentage : 100% / Remaining Capacity : 47.20Wh / Full Charge Capacity : 47.52Wh / Current: 0.00 A / Voltage : 12.39V / Wattage : -  /  Temperature : 22 c  / Cycle Count : 1 / Manufacture Name : SANYO / Manufacture Date : 2010-09-19 / FRU Part Number : IBM-COMPATIBLE /Device Chemistry: Li-Ion / Design Capacity : 47.52Wh /Design Voltage : 10.80V

Problem:  With AC Power system works perfectly fine. The Moment when i remove the power from AC and try to work with battery power "SYSTEM FREEZES" IMMEDIATELY.I tried to change batteries 3 times from the vendor.

I also updated the latest Bios - 1.29(70ET69WW) and tried with all other Power Scheme. I tried to search entire forums. With my Old Battery system works fine too. Also tried to diagnostics with Lenovo Toolbox, where test device functionality- Passed.

I appreciate any help to resolve my problem. Thank you

[Maliha Community Moderator]

Hi and welcome to the forum!

As you can also see, the culprit is the aftermarket battery. These batteries are no good in my stance, and shouldn't be used. If I were you, I would return it and get a genuine from eBay or try to find one from the Marketplace of ThinkPads forum.

Hope this helps.

[spb_24]

Hi,

Thanks for the response.As i mentioned, first tried with lenovo market place.I heard there is no replacement battery for this T43 1871 FU1 model.Then only i tried with all other vendors.Most of people in the forum discussed about buying battery from Amazon/Ebay as a second alternative.

Important Point: When i troubleshooted the New Sanyo Battery(AGPTEK) with LENOVO Tool Box, it PASSED the Test.And it says new battery  is IBM-Compatible.And the battery charges fully and shows 100%.

Still i suspect some compatibility issue , even i updated Bios to the latest version(1.29) and also tried with different Power Scheme.Updated POWER MANAGEMENT to the latest version from lenovo.

ISSUE: THE MOMENT when i unplug the AC power, System hangs with new Battery power.

Kindly someone give me some technical inputs.I will really appreiate your response.Thanks in advance.

[ajkula66 Guru]

I've owned ThinkPads that were behaving in such a manner with genuine batteries that were starting to go bad.

You don't need a battery specifically designed for 1871-FU1. Whole T4x/R5x generation of ThinkPads share the design.

Although there are none available at the Outlet right now, bookmark the page and keep on checking:

http://outlet.lenovo.com/accessories/batteries.html?p=1

Defective battery of any kind will eventually damage the charging circuit on the motherboard, so you're better off running the machine without a battery until you obtain a proper replacement.

[spb_24]

Thank you very much for your response.I will defintely keep a look on the web site you have mentioned.

Problem is which ever vendor, im ordering these batteries , almost all the vendors sending the same Sanyo(AGPTEK) Batteries as replacement for this FRU P/N 92P1087.This is my 3rd attempt made with three different vendors.All the three times the same result.

Any help will be deeply appreciated.. thank you

[ajkula66 Guru]

A quick feebay search got me this:

http://cgi.ebay.com/NEW-NB-Genuine-IBM-4-4Ah-6c-Battery-T40-T41-T42-T43-R50-/190496048517?pt=Laptop_...

I'm not affiliated with the seller in any way, proceed at your own risk.

Good luck.

[spb_24]

George...Thank you for your efforts...

[ajkula66 Guru]

You're very welcome. Always happy to help a fellow ThinkPad owner if I can...

Good luck.