Fax：(+86) 769 2229 0098
ADD：Tonghui Road, Dongcheng Science Park,
Greenway New Energy
ABOUT US PRODUCTS NEWS Scan QR code to follow
How to Wake a Sleeping Lithium-ion Battery- Methods, Overcharging and Cycle Life
Lithium-ion batteries are rechargeable batteries that are ideal for most electronic devices like smartphones and laptops. The batteries contain a protection circuit module. The protection circuit samples the voltage in a lithium-ion battery and outputs the same sample voltage. This safeguard shields the battery from abuse and makes it possible to turn on and off the battery. It is also activated when a battery is over-discharged hence making it unusable. It happens because the protection circuit is meant to detect the battery voltage and cut off the lithium batteries when the voltage is below a specified voltage. When this occurs, the battery goes into sleep mode. Let's have a look at methods of waking up a sleeping lithium-ion battery, whether it is possible to overcharge it, and the life cycle.
Before deciding to discard off a supposedly dead battery, let's take a look at methods of waking up a sleeping battery.
Step 1: Read the voltage.
First of all, you need to confirm if your lithium-ion battery has some charge remaining. Start by turning off the power source to the electronic device and removing the battery. Using a voltmeter, take a voltage reading to check whether the battery has any juice. For example, if your battery's rate is at 4.0v and the voltmeter shows 2.0v, it may be in sleep mode.
While doing this, keep in mind that different manufacturers will cause the battery to go to sleep mode at varying levels of voltage. Therefore, it is good to familiarize yourself with your battery's capacity to be able to wake it up.
Step 2: Connect to a charger.
Using an appropriate charger, connect the battery for some minutes while keeping an eye on it to detect if there are any signs of damage and healing. Use a charger with the ''boost'' or ''wake up'' feature.
Keep in mind that it is not advisable to boost a lithium-ion battery that has a voltage of 1.5 and below. It is because a battery that has been under-charged for an extended period could have developed copper shunts that might cause electric shorts. These shorts are what usually cause overheating in batteries and may cause an explosion.
Step 3: Read the voltage again.
Check the voltage using a voltmeter. A higher reading than before means the boost is working, the same voltage would mean the process was unsuccessful, you should consider buying a new battery. Make sure you check your charger's manual to know when the process would be complete. Take note that battery revival may not always be successful.
Step 4: Charge and discharge the battery.
If the boost worked, you can now connect the lithium-ion battery to its charger and charge it fully.
Step 5: Freeze the battery.
In an airtight bag free of moisture, freeze the battery for a full day after fully charging and later allow the battery to cool until restored to the initial room temperature. It would happen within 5- 10 hours.
Step 6: Charge the battery.
Connect the battery to a charging system and charge it fully.
Following up these processes may prove to be tiresome as it requires a lot of patience and safety precautions. As an individual, it is a personal choice. You can even consider taking the battery to a professional to service it properly.