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Recharge Dead Lithium-ion Battery – Reviving and Charging Methods
Lithium-ion batteries are the cells of the future, powering enormous inventions and machines around the world. However, the good thing about these cells is that they have an exceptionally long lifespan. This allows the cells to be rejuvenated whenever they may seem dead.
Can you revive a dead lithium-ion battery?
Yes, it is possible to resurrect a dead lithium-ion battery using a few simple and convenient tools. However, these batteries can be very unstable especially when they are handled inappropriately. Therefore, when you’re trying to revive a dead lithium-ion battery, ensure that it isn’t damaged in the first place and that you know what you’re doing.
How do you charge a dead lithium-ion battery?
Sometimes, when you store a discharged lithium-ion battery for extended periods, it may fall into a sleep mode. All batteries tend to self-discharge, even in lithium-ion batteries, although at a very slow rate, the remaining charge in the cells would be depleted. You should get a battery charger that has a special feature known as “boost” to charge the battery that seems to be dead. Normally, every modern lithium-ion battery is fitted with a protection circuit and when the battery is in a discharged state below normal, this circuit shuts down.
The boost function in some analyzers or lithium-ion battery chargers applies a small amount of current that would jumpstart the protection circuit. When the right cell voltage is reached, the battery will be capable of taking in charge normally. However, experts warn against boosting lithium-ion batteries that have been discharged below voltage point for a very long period. This is because such a cell may become unstable during the process and this can lead to the battery overheating. In the end, th battery might even catch flames and explode thus, causing lots of damage.
How do you revive a dead lithium-ion battery?
Step 3: Alternative (USB cable)
Step 4: Charge and discharge the battery
Plug in the battery into a lithium-ion battery charger and charge it to maximum capacity. A normal lithium-ion battery would take about 3 hours to get t 100% but this varies depending on the size of the cells. Once the battery is fully charged, you will need to discharge it. This can be done by inserting the battery back into its load and giving it and draining it entirely but not below voltage point.
Step 5: Freeze the battery
Once the lithium-ion battery is fully discharged you will have to place it in an airtight plastic bag and seal it. Ensure that there is no moisture in the bag before putting in the battery and you can wipe it dry if you suspect something. Place the bag into the freezer and let it settle for around 24 hours. When this time frame expires, take the battery out of the freezer and leave it to defrost for about 8 hours until it gets back to room temperature.
Step 6: Charge your battery
Once the battery is back to room temperature, you can then plug it into your lithium-ion battery charger and take it back to 100% once more. You would notice that the battery’s performance has significantly improved and that it would even last longer in between charge cycles.
If you have no idea of what you’re doing, be sure to call in some help from people who are equipped with the skills and experience in such projects. There’s no need to throw away a perfectly good lithium-ion battery in the name of it being dead because it might actually be asleep. After all, this battery technology is expensive to acquire in the first place.