The battery is one of the most vulnerable spots in a laptop. If your laptop doesn’t run on battery power even when the battery is fully charged, or if it simply runs out of power very quickly, then it’s time to change the battery. Of course, the easiest way is to buy a new battery. But what if your laptop is already several years old and batteries are no longer available for it? Or don't you want to spend money on buying an expensive battery at the moment? You can try to repair the battery yourself.
It is necessary
hammer, scalpel or knife blade, voltage tester, resistor, soldering iron
Instructions
Step 1
Select replacement cells Remember that all battery cells must be of the same type and capacity. It is highly desirable that they all be from the same batch. The battery cells must have the same internal resistance and voltage.
Step 2
Prepare the items for installation New items are shipped half charged. Discharged cells must be installed in the battery, the voltage of which is approximately 3.1V. A resistor can be used to discharge the cells. To do this, it is necessary to connect all the elements ("minus" to "minus", "plus" to "plus"). It is not recommended to discharge the cells one at a time.
Step 3
Fully discharge the laptop battery.
Step 4
Remove it from the case.
Step 5
Open the battery casing Tap the battery casing around the entire perimeter with a small hammer. Insert the scalpel blade into the battery body to a depth of 1–2 mm. After a crack appears in the case, move the halves of the case apart with your hands.
Step 6
Measure the voltage across each element with a tester.
Step 7
Disconnect the old elements from the electronic board, moving from the greater "plus" to the smallest.
Step 8
Connect the new elements in reverse order. Connect ground first and then plus.
Step 9
Carefully check the quality of the soldering and the correct connection.
Step 10
Replace the battery covers.
Step 11
Install the battery into the laptop case.
Step 12
Plug in your laptop.
Step 13
Check battery operation after charging. If the battery life has increased - everything is done correctly.
