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Battery die fast

2014-01-14, 7:54 AM



I have a problem with my battery now. It only charges 47% of the original designed capacity. I do not know what I did wrong. Before the Winter Break, the laptop battery was working very well, charging as designed capacity. In the last 3 weeks recently, the battery is dying very fast. 


The total number cycle count is only 412 times. I always set charges threshold for the computer as 30%-70%.

I already done the battery gauge reset but it does not help. 47% of original capacity. 


My question is how long is the battery warranty? - number of years / number of cycling count.


Any solution for my problem?


Thank you

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Re: Battery die fast

2014-01-15, 3:07 AM



Welcome to Lenovo Community Forums!


I’m sorry to hear that battery in your Lenovo ThinkPad charges only up to 47% of its designed capacity.


I would suggest you to update power manager and power management driver and change the charging thresholds in Power manager to “Always fully charge” under Advance battery option ->battery maintenance. Ensure that the system is plugged-in and that battery firmware is up-to-date.  Check the Lenovo support site for any battery firmware updates for your particular model. Also, update BIOS to the latest level and check.


Capacity of a battery declines as the battery ages, with the number of charge cycles and time at high temperature. Under average usage patterns your battery maintains approximately 70% of its power capacity after the first year of operation.


Refer this document to see the tips on how to increase the battery life.


If neither of the above said helped to resolve your concern, probably your battery would have undergone normal wear and tear due to usage.


Regarding battery warranty, unless you have purchased a separate Battery Warranty Extension, warranty coverage for your battery will expire at the end of the original term (1 year) of your Lenovo Limited Warranty.


Best regards,


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Re: Battery die fast

2015-05-05, 18:32 PM



I have a very similar problem to the one above. I purchased a new Y40 last summer and now the battery is having major issues and will never last more than 1 hour. It will get stuck charging at random levels, sometimes get to 100%, but never last for more than an hour even with no apps running. 


I've updated my driver and Lenovo Energy Manager but its only getting worse. I have around 150 days left on my warrenty so what are the next steps there? I use this laptop daily for work so I need a solution fast and can't be without my machine for long.





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Re: Battery die fast

2015-05-05, 23:04 PM
The normal battery warranty is 1 year. If your battery is failing in less than a year, you should call support.


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.

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Re: Battery die fast

2016-10-11, 17:58 PM

In response to customer reports of unexpected battery gauge behavior on Y40-70 and Y40-80 laptops, Lenovo determined the battery gauge software is performing as expected. The unusual gauge results being reported are a reflection of the battery reaching end of life.


Lenovo has released a Service TIP to assist customers with obtaining battery replacements under warranty, or if out of warranty, to find a replacement battery from Lenovo-approved vendors. The Service TIP can be found here: https://support.lenovo.com/us/en/solutions/sf16-I0023


The part numbers for Y40-70/80 batteries are:

Y40 SP/A L13M4P01 7.4V48Wh 4cell bty (Y40-70/Y40-80) 121500248

Y40 LG L13L4P01 7.4V48Wh 4cell bty (Y40-70/Y40-80) 121500249 substitute part 121500251

Y40 CP/C L13C4P01 7.4V48Wh 4cell bty (Y40-70/Y40-80) 121500259 substitute part 121500251


To determine which battery came with your Y40 notebook, instructions for removing the bottom cover can be found in the Hardware Maintenance Manual pdf here. An alternative to opening your system (which does not void warranty) is to search for batteries using the model/product number located on the bottom cover.


Thank you,

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Re: Battery die fast

2019-11-24, 15:11 PM

The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.

The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may contribute and benefit. ... GeezBlog


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