HOW TO REPAIR LAPTOP BATTERY ?

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Introduction: HOW TO REPAIR LAPTOP BATTERY ?

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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    93 Discussions

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

    1 more answer

    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

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

    i use all new 18650 battery.

    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

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

    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!

    3 more answers

    Also is there some easy way to change battery without blocking Smart Chip.
    You have to reconect wires since high voltage (+) to (0).
    10,8-7,4-3,7-0.
    New batteries begins connect Via Vise.
    0-3,7- ...

    Hi.Modern Smart Battery has smart chip inside battery and suddanly fix if you reconnect some of battaries from package.
    Better solution for hack it You must do previosly simulate of voltage to chip,whit sone 12 volt adapter.only after that change battery and reconnect simulator!

    It may be that the cells are not close enough in voltage to each other. If this is so, the charging circuit will not allow the pack to charge. Put your multimeter on the three sets of cells, see if any are lower (or higher) than the other two. If they are, my solution is to use a separate LiPo charger (available for a few GBP from Amazon) to charge up the low ones a bit until they are closer to the rest in voltage, then the pack should charge. Unless you have other problems as well, that is.

    Modern Smart battery has chip inside battery and without some voltage simulations or more expensive Reset trough PC adapter,You will get new but unworking condiction battery...

    Waqar my laptop battery habe problem that it drains too fast becouse of it is 4 year old. When i took out the battery cell and chaked the power by multemeter all 6 cells shows 4.9 but it drains too fast and also it charging too fast... i dont what is the problem.cells show perfact voltage. My quetion is this how i can chack my battery cell parfectly to find out dead cell. ??

    1 more answer

    Just change all the cells in same configuration...
    Make sure the same configuration...
    Otherwise it can harm your laptop...

    How to open battery box without damaging?

    >>JUST open your original laptop battery and throw the cells

    >>because they are all useless & keep the circuit

    If these are lithium cells, DO NOT throw them away. They can be recycled and shouldn't be put into the trash.

    6 replies

    Yeah, but at the price of buying a new set of six 18650s I may as well just get a full replacement battery from a discount supplier... Hardly any difference.

    You can buy a good quality 6 pack under 10 bucks (I am from Europe and I have buy them at 1.2eur/pcs). Let me doubt you will find a replacement for this amount...

    We agree 100% about the economics. The purpose of my message was to try to keep the lithium cells out of the trash. Depending on the source you read, they may be a hazardous material.

    One thing that may be relevant is where you live. There are differences from country to county in laws about protecting the environment, resources for recycling things that we Americans can recycle, and the cost of some of these things that are cheap and easy to find where we are.

    Some time a l.t battery is dead
    Becoz,, of circuit is dead not the batteries.

    But sometimes few cells are dead in a battery

    I have opened many l.t batteries
    My experience was 60:40 where 60 is good 40 is below 1000 mah (can be used for other projects)

    Circuits never die. It locks itself and sets itself "Permanent Failure" flag then blows the fuse when it dedected some issues,like when 1 cell died in battery. one died cell will make battery extremely unbalanced , it will heat pretty much then battery will lock itself

    Same thing can happen when battery is over discharged. Or when you overload the battery. It will blow fuse , then battery will enter pf mode.

    And last warnings ; the battery can die even when upgrading firmware of battery (especially lenovo / IBM batteries with custom firmware ).

    If you have a Lenovo/IBM battery. Dont try this. It will OK to disconnect cells . but when you reconnect new cells , it will enter pf mode and blow the fuse when you triggered a power reset of circuit / smb controller.

    And when you trying to recell a battery , first disconnect GND at end of the cells , when you builded all cells , connect GND last. Because removing gnd will immediately power down battery controller. If you disconnect cells randomly , battery will dedect imbalanced cells and it will enter the permanent failure mode.(And if you have a battery with a external eeprom (like bq2040/2060) backup eeprom first in case battery gets locked , just rewrite backup to battery then powercycle the circuit)

    Sorry for long post and bad english. These are all my information about SBS 1.0 and 1.1 compatible batteries.