HOW TO REPAIR LAPTOP BATTERY ?

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HELLO MY FELLOW !

I AM WAQAR

here, i will show you how to repair your laptop battery for very cheap at home.

+WHY ?

The laptop batteries consists of lithium cell which are called 18650 cells

they are not eternal

they have life period of about 2 years

+WHEN TO REPAIR ?

when you see your laptop is charged fully but does not last even half an hour or less.

which means the cells inside the battery are dead.

Step 1: REQUIREMENTS

-1 old dead laptop battery from laptop repair shop

-1 your laptop battery (which you want to repair)

some wire & tools like wire cutter etc...

and also some electric tape

Step 2: OPEN THE OLD DEAD BATTERY

Use some tools to open the laptop battery without damaging the battery box

because the box will be used later.

Step 3: GET THE 6 CELLS OUT FROM OLD DEAD BATTERY

Take out the 6 cells which are in 2-2 parallel connection.

(don't break the parallel connection but cut the series connection)

Step 4: TAKE OUT YOUR MULTIMETER & CHECK THE VOLTAGE

THIS step is very important !

generally 3.6 or above volt batteries are good below this voltage are the bad ones

voltage test is just temporary solution for the capacity check of 18650 cells

i recommend to use imax b6 charger for capacity test.

JUST GET 6 GOOD (18650) LITHIUM CELLS OR BUY THEM FROM AMAZON OR EBAY

Step 5: NOW CONNECT CELLS IN SERIES CONNECTION

BY using some wire connect all cell in series connection

just check the overall voltage of battery pack

it should be around 12 volts .

Step 6: NOW OPEN YOUR ORIGINAL LAPTOP BATTERY

JUST open your original laptop battery and throw the cells because they are all useless & keep the circuit

(if you want to keep then check the capacity if some of them are good then keep them for future projects)

IMPORTANT:

don't damage the circuit or battery box while opening the battery .

Step 7: CONNECT THE CIRCUIT TO THE BATTERY PACK

NOW by using some wires connect the battery pack to the circuit

IMPORTANT:

you will see 4 wires coming out from the circuit in which the longest is negative.

the battery pack will also have 4 wires 1 is negative and 3 are positive (one to the end and two between the battery pack)

Step 8: CHECK BEFORE PACKING BATTERY

connect the battery circuit to the laptop

and press power button to see it's working or not

IMPORTANT:

if nothing happens after pressing power button

don't panic connect the charger to the laptop for 5 minutes then remove the charger.

(if again not working just contact me with your problem)

Step 9: SUCCESS! JUST PUT BATTERY AND CIRCUIT INSIDE THE BATTERY BOX

the final step to put battery pack and circuit in the battery box.

do it gently .

use some super glue or tape to fix the joint of battery box.

!!!!WE ARE DONE!!!!

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    107 Discussions

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    IzharH4

    11 days ago on Step 8

    Hi. Sir thanks for the great guide.
    I have HP pavilion sleekbook.
    I followed all the steps and bought 4 new same cells ( best available) from local market and fixed the battery as mentioned but i face some problems.
    1. At start my laptop didnt detect the battery even it was charging and switching on but the icon down in task bar disappeared.
    2. After removing the battery twice and let it charge for 4 5 hourse .. the battery icon reappeared but ...

    THE BETTERY FULLY CHARGED WITHIN 10 MINUTES AND IN THE SAME TIME DISCHARGES!!! EVEN IT SHOW 1 HOUR 15 MINUTES REMAINING BUT THE LAPTOP SWITCHESD OFF IN 15 MINUTES.
    PLEASE HELP

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    jain_piyush

    5 weeks ago

    i want to do this but i m worried that will it affect my laptop life or mother board ,Your process is clearly simple and i have 4cell battery with the total voltage (14.6)and 2670 mAh which is return on the laptop and i have check the voltage that is 12.70, now 1 cell is damaged and others giving the 3.52v which is crct so can u plz help me tht which battery should be useful for me ....

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    shamshad.ti

    Question 7 weeks ago on Introduction

    My acer travelmate 4740 laptop battery is dead. I arranged 18650 type 6 good battery. Old battery removed from circuit board. I don't know, how to connect new batteries to board. It is in 4+2 configuration. I mean 4 batteries in top and 2 in down. Board have 4connections. Please help me

    1556866154466160184984825582446.jpg
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    Phyothant1993

    Question 3 months ago on Introduction

    my battery is from dell and it still flashing battery light after connecting to the battery and not working or charging it. On boot screen it shows battery permanently failure. Please email me or reply me :'(

    Untitled.jpg
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    Sunil KumarB

    3 months ago

    Hi WAQAR
    I did all of these things then connected to the laptop pressed power button nothing happened.
    Then I connected charging cable for ten minutes charging indicator blinked then I removed charging cable.
    Again I pressed power button but nothing happened.

    What shall I do? Explain.

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    Rohanp83

    6 months ago

    Battery showing 100% charged but laptop shuts immediately when power chord are removed. Any suggestions ...... How to fix it

    1 reply
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    NelmarO1Rohanp83

    Reply 6 months ago

    I need to repair my battery NBP12A05

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    ArenM2

    6 months ago

    I need to repaire Fujitsu 10.8 volt Li-ion battery pack having 6 cells.
    Can i insert new Li-ion 3.7 v x 6 cells of 2200 mAH batteries ?

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    ChrisD542

    Question 6 months ago on Step 8

    regards,
    following your instructions as described above, just as seen in step 8, the battery cells does not charge. kindly provide more insight. thanks

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    AbhijitG14

    Question 6 months ago on Step 5

    Plz show the 6 cell lenovo laptop battery connection with connector in soldering with images .

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    ab1jx

    6 months ago

    I skimmed this whole article to see if anybody mentioned this stuff. There are smart batteries and not, the year doesn't matter that much. I have a Dell and an HP made the same year, the Dell battery is smart, the HP isn't. I replaced the HP with a battery from eBay and it's been fine for a few years, I tried 3 replacement (unofficial) Dell batteries before one worked. I've been collecting facts and URLs on this Raspberry Pi page https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=228114&p=1399041#p1399041 Smart batteries need to (at least) be reset when you replace cells. The "gas gauge" chip in the battery learns the charged and discharged voltages, you need to clear those. On the other hand you can have nicad, nimh and lithium packs that work in the same laptop, they report essentially a percentage charge back to the laptop so it doesn't need to track voltages. Matching series cells is an issue yes, but my Dell battery pack has 9 terminals, enough to have a connection between each pair of cells which would overcome this. I haven't gotten one open yet, that's what I came here for, to find the least damaging way to open one.

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    Sujeevan1

    Question 7 months ago

    Hi im sujeeva ,from srilanka.
    Thanks for your great explanation .i repair my nec laptop battery pack .i replace new 18650 four batterys .but its not working .the laptop displayed 0% battery .i attached image of that.please let me kno why is that not working .thank you.

    IMG-20181028-WA0006.jpgIMG_20181002_092353.jpg
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    RahulD124

    10 months ago on Step 8

    Sir I'm done almost all think properly BT when I connected the battery and puch to turn on button battery don't get any action when I connected charger the only power indicater shows not showing battery signal please help me

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    YomiD

    Question 11 months ago on Step 8

    I connected the battery after observing all your details but yet laptop says 0% battery plugged in, not charging.

    1 answer
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    AtthavutRYomiD

    Answer 11 months ago

    me too. i try to unplug and plug in again, it's now charge to 100%.

    but battery drain so fast, i don't know why

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    AtthavutR

    Question 11 months ago on Step 9

    after repair it's ok, but why battery drain so fast?

    i use all new 18650 battery.

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    OluwapelumiO1

    Question 1 year ago on Step 8

    Thanks, I have gone through this process and powered my laptop with the Ac power but the error message is 'plug in, not charging ' what do I do

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    MalikK8

    Question 1 year ago on Step 9

    hi, I followed your instructions but now the battery isn't charging. Any idea what causes it to not charge?

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    Ashp16

    Question 1 year ago on Step 8

    Hey there, I have HP Pavilion G6 laptop with battery MU06, which was not working from a month or so...after opening the battery i found out that 2 18650 batteries were showing 0 volts. I replaced those two with healthy 4.10 volts charged batteries from another laptop's battery pack. After repairing and inserting battery I got the error of replacing HP battery on my bootup window and now my laptop shows 100% fully charged battery but it works on live power and shuts off when i pull out the charger cable. Any suggestion please!