When your battery eventually loses its ability to hold power, repairing the battery may be more cost effective than replacing the battery.
1. First check your battery status, download Chen Xu, check the battery, and then check your computer for batteries. Run this program, then the test results will come out.
2. To empty and take out your battery
Before the computer removes the battery, all batteries must be vented. Then take it out
3 Delete the old cell
Use a utility knife to cut the plastic of the closed cell. Before removing the battery from the battery tray and disconnecting the leads, verify that the laptop battery needs to remain charged to retain any data in memory, such as resistance or fuel gauge capabilities. In these cases, you must maintain the circuit’s auxiliary power while replacing the worn battery. Make sure to disconnect and reconnect the wires in the correct order. This may require the help of a voltmeter to correctly determine the positive, negative, clock, and data connections of the battery circuit.

Install new unit
Place the new battery in the tray, connect the electrical contacts and cover them with plastic. The batteries are usually held in the correct position, but if the wires are damaged when the batteries are removed, they may need to be glued in place. When soldering, it is important to avoid overheating that could damage the battery or the circuit. Reassemble the battery pack housing.

Install the battery
Determine if your battery has an on/off switch. The laptop battery cannot be opened when the circuit is grounded and may require the manufacturer to provide special codes. Verify that the polarization is correct and that you are using a compatible charger. If the battery has a different state of charge, use slow charging. Do not attempt to charge damaged cells or cells with different chemical properties. Fully charge the battery before using the laptop.

This varies depending on your usage, of course, but the average laptop battery is good for around 400 recharges (a.k.a. cycles). After that, it starts to lose its capacity to hold a charge. That’s why the battery that once gave you, say, 3-4 hours‘ worth of runtime now peters out after just 1-2 hours

And, of course, you can also choose to replace your battery, this operation will not appear troublesome, after all, the new battery experience will be better than the repaired battery experience, if you need to replace the battery, please click this link.