HELLO MY FELLOW !
I AM WAQAR
here, i will show you how to repair your laptop battery for very cheap at home.
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)
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
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
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!!!!