The jump-starting lithium battery is one of the most preferable methods to enable the battery, but the application of this idea should be done carefully to avoid creating any kind of safety hazards. A battery-repair device is a more sophisticated way of reviving a lithium-ion battery.
Another way to fix Lithium-ion battery cells is by voltage applying method to activate the battery. This step involves providing a small amount of voltage to the battery using an adjustable power supply. This is similar to the ‘jump-starting’ capability of batteries.
The slow charging method is by far the easiest and safest way to solve lithium battery problems. You have to use the same battery to apply only a low current for the slow charge. The slow charge method is a docile approach in which you gradually restore the battery’s functionality.
Sometimes, a hard reset can resolve charging issues with lithium-ion batteries. This involves turning off the device, removing the battery (if possible), and holding the power button for 15-20 seconds. Reinsert the battery (if applicable) and attempt to charge the device again. Reset the Battery Management System (BMS)
So, if the lithium-ion battery in your smartphone has seen better days, there are a few things you can try to bring it back to life before spending the cash to replace it. If your battery can't hold its charge anymore and drains extremely fast, you might be able to save it by doing a full recharge.
Swelling is one of the very first signs that a lithium-ion battery cannot be fixed. This swelling is a sure indication the battery has internal damage, such as too much gas or an overheating of the battery. If your battery is swollen, do not use it or charge it. Trying to repair a battery in this condition can cause it to break or even explode.