If you overcharge the Lithium-ion battery, it may go into sleep mode. This battery, on the other hand, will recover once the voltage per cell exceeds the minimal threshold. In this article, we will give you a complete guideline on How to wake a sleeping lithium ion battery.

How to wake a sleeping lithium ion battery

When a lithium-ion battery is not charged enough, it goes into sleep mode. It can be concerning because most people consider such batteries to be useless and trash them because the charger renders them unusable. A sleep mode, on the other hand, should not be a cause for concern because several analyzers and chargers (Vencon and Cadex, respectively) provide a boost and wake-up capability to reactivate such batteries. By supplying a modest charge voltage, the boost turns on the protective circuit. When the correct cell voltage is applied, it allows a charger to charge normally more efficiently.

Let’s have a look at some strategies for awakening up a sleeping battery before discarding it.

Step 1: The voltage should be checked.

First and foremost, check to see if your lithium-ion battery is still charged. Begin by turning off the electronic device’s power source and removing the battery. Take a voltage reading with a voltmeter to see if the battery is still alive. If your battery’s rate is 4.0 volts and the voltmeter reads 2.0 volts, it could be in sleep mode.

Keep in mind that different manufacturers will cause the battery to go into sleep mode at different voltage levels. As a result, it’s a good idea to get to know your battery’s capacity so you can wake it up.

Step 2: Connect to a charger.

Connect the battery to an adequate charger for a few minutes while keeping an eye on it to see if there are any symptoms of damage or healing. Use a charger that has a “boost” or “wake up” mode.

Keep in mind that boosting a lithium-ion battery with a voltage of 1.5 or less is not recommended. It’s because a battery that’s been undercharged for a long time could develop copper shunts, which could lead to electric shorts. These shorts are the most common cause of battery overheating, which can result in an explosion.

Step 3: Check the voltage once more.

Using a voltmeter, check the voltage. If the voltage is higher than before, the boost is working; if it is the same, the operation fails, and you should consider purchasing a new battery. Make careful to consult the handbook for your charger to see when the process is finished. It’s worth noting that battery resurrection isn’t always successful.

Step 4: The battery should be charged and discharged on a regular basis.

If the boost was successful, connect the lithium-ion battery to the charger and fully charge it.

Step 5: The battery should be frozen.

Freeze the battery for a full day after fully charging it in an airtight bag free of moisture, then allow it to cool until it reaches room temperature. It would take between 5 and 10 hours.

Step 6: The battery should be charged.

Connect the battery to a charger and completely charge it.

Following up on these procedures can be time-consuming, as it necessitates a great deal of patience and safety precautions. It is a personal choice for each person. You could even consider having the battery serviced by a professional.

Learn how to keep a Li-ion battery from going into sleep mode.

State-of-charge

Lithium-ion battery storage is a bit of a risk. On one hand, manufacturers advise keeping them charged at 40–50 percent, while on the other, there’s the risk of them being lost owing to over-discharge. There is plenty of room between these criteria, so if in doubt, keep the battery charged and stored in a cool location.

Do not boost your batteries

Lithium-based batteries that have been below 1.5V/cell for a week or longer should not be boosted back to life. Inside the cells, copper shunts may have formed, resulting in a partial or entire electrical short. When recharging, such a cell may become unstable, generating excessive heat or exhibiting other abnormalities. If the voltage does not rise normally, the Cadex “boost” mechanism stops the charge.

When boosting a battery, make sure the polarity is proper. When a battery is placed in reverse polarity, advanced chargers and battery analyzers will not work. The voltage of a sleeping Li-ion is not visible, thus boosting must be done with caution. Li-ion batteries are more delicate than other systems, and reversing the voltage might result in irreparable damage.

Charging and discharging: 

A wake-up feature or “boost” is available on some battery chargers and analyzers (including Cadex) to reawaken and recharge batteries that have fallen asleep. A charger without this option will render these batteries unusable, and the packs will be discarded. Boost activates the protective circuit with a modest charge current, and if the correct cell voltage is attained, the charger begins a normal charge.

Some over-discharged batteries can be resurrected with a “boost.” If the voltage does not return to normal after a minute of boost, the pack should be discarded.

Safeguard

A protective circuit is built into Li-ion batteries to safeguard them from being abused. If the battery is overcharged, this crucial protection also shuts it off and renders it unusable. When storing a Li-ion pack in a depleted state for any period of time, self-discharge will progressively deplete the remaining charge, resulting in sleep mode. The protective circuit of a Li-ion battery cuts off between 2.2 and 2.9V/cell, depending on the manufacturer.

Myths about Lithium-ion Battery Charging

There are various illusions concerning rechargeable batteries that regularly confuse people, whether it’s about phones or any other equipment with a Lithium-ion battery. To compensate for the adversary, we have created a slew of battery-related myths and misconceptions. We always come up with inventive misconceptions, whether it’s leaving your phone on charge all night or turning it off to give it a rest.

However, if you pay attention, you will notice that half of what you say and think has no relevance. We made up stories to persuade ourselves to keep batteries in good working order. As a result, we gathered information from specialists all across the world to debunk some widespread myths. With their decision, perhaps you will cease propagating battery myths all over the place.

Service for Lithium-ion Batteries

Large Power, without a question, creates the best products in the business, yet even they are vulnerable. Extreme hot and freezing temperatures can have an adverse effect on Li-ion batteries. It is, however, repairable. Because they are rechargeable, you can have them repaired by a local battery repair business.

Frequently asked questions

Is it true that lithium batteries go to sleep?

The protection circuit takes a voltage reading from a lithium-ion battery and outputs the same reading. Because the protection circuit is designed to monitor battery voltage and switch off the lithium batteries if the voltage falls below a certain threshold, this occurs. The battery goes into sleep mode when this happens.

How can you bring a lithium-ion battery back to life?

Place the Li-ion battery in an airtight bag and freeze it for around 24 hours, making sure there is no moisture in the bag that could cause the battery to become wet. Allow it to thaw for up to eight hours after removing it from the freezer to bring it back to room temperature.

How do you fix a non-charging lithium-ion battery?

If your battery is no longer able to hold a charge and is rapidly draining, a full recharge may be able to save it. For this to work, you’ll need to completely drain the battery, so once it gets zero percent, keep turning it back on until it can’t even boot.

What is the best way to recover a dead battery?

Connect the battery to your phone, but do not turn it on. Instead, connect the phone to the appropriate charger and leave it to charge for 48 hours. Turn the gadget on and verify the battery power level after it has been charged for 48 hours.

A 12v lithium ion battery is dead at what voltage?

The voltage begins at 4.2 volts and quickly lowers to around 3.7 volts throughout the duration of the battery’s life. The battery is dead when it reaches 3.4V, and when it reaches 3.0V, the cutoff circuitry disconnects the battery (more on that later). 4.1V/3.6V batteries are also available.

What are the signs that my lithium ion battery is failing?

If the battery’s voltage is less than or equal to 3.4v, it’s dead; otherwise, you can charge it with a bms and a charge adaptor.

Is it true that lithium ion batteries deteriorate if they aren’t used?

So, if a lithium battery is left unused for an extended period of time, will it be damaged? Yes, that’s correct. Brand-new, never-before-used batteries: The lithium battery pack’s manufacturer standard charge is 30 percent -40 percent under typical situations. As an illustration: The manufacture capacity of an 18650 14.8V 2200mAh battery pack is between 600 and 900mAh.

How can you strengthen a weak battery?

They came to the conclusion that there are a few simple software and hardware solutions for preserving battery life.

• Make use of the Airplane mode.
• Smart battery modes should be enabled.
• Video content should be limited.
• Instead of 4G, use Wi-Fi.
• Turn off the cellular network or set a time limit on how long you can talk.
• Reduce the brightness of the screen.

What is the voltage of a fully charged lithium battery?

A fully charged lead acid battery, for example, will have a voltage of around 12.6-12.7V, but a fully charged LiFePO4 battery will have a voltage of around 13.3-13.4V. A lead acid battery will have a voltage of around 11.8V at 20 percent capacity, whereas a lithium battery will have a voltage of around 13V.

How can I maintain the health of my lithium-ion battery?

Here are some tips for keeping your lithium-ion batteries in good shape.

• Lithium-ion batteries should not be entirely discharged.
• Allow minor discharges but refrain from complete discharges (usually).
• Rather than lugging a replacement battery, consider obtaining a high-capacity lithium-ion battery.
• Maintain room temperature for your batteries.

When lithium batteries fail, what causes them to do so?

Researchers have identified why lithium metal batteries fail: when discharging, particles of lithium metal deposits break off from the anode’s surface and become stuck as ‘dead’ lithium, preventing the battery from cycling.

When lithium-ion batteries are not in use, how do you store them?

The batteries should be charged to around 30 to 50 percent capacity and stored at room temperature. To avoid over discharge, we recommend charging the batteries around once a year. Note that test results show that partially depleted lithium-ion batteries are best stored.

Is a Lithium-ion battery the best option?

Even better, lithium-ion batteries keep their charge for longer and contain far fewer harmful elements. Lithium is a suitable element for making powerful, portable batteries since it is the lightest metal on the periodic table and the one most ready to shed its electrons.

Is it true that batteries die if they aren’t used?

Ions freely move between a cathode and an anode in a healthy battery. Even if you don’t use your batteries, they degrade. A completely charged lithium-ion battery will lose around 20% of its capacity after a year of regular storage, according to Cadex Electronics, a battery testing company.

Is it possible for a dead lithium battery to explode?

It isn’t impossible, but it is extremely unlikely. The reason for this is that when they are discharged, they do not contain much energy. Yes, the electrolyte is flammable, and if pierced, the lithium can react exothermically with the air.

What happens if a lithium ion battery is frozen?

Internal resistance rises as the temperature drops, lowering capacity. What happens when lithium batteries freeze in the same way? Most lithium ions fail to intercalate into the graphite anode when a lithium ion cell is charged below freezing temperatures.

Is it true that fast charging is hazardous for the battery?

The overall line is that fast charging has no significant influence on battery life. However, because of the physics of the technology, you shouldn’t anticipate the battery to last any longer than a traditional “slow” charging brick. But that is only one factor.

Is it true that lithium-ion batteries are harmed by cold temperatures?

Lithium batteries rely on chemical reactions to function, and the cold can stifle or even halt those reactions. Unfortunately, charging them in cold temperatures is less effective than charging them in warm weather because the ions that produce the charge do not travel as freely in cold weather.

What does Lithium “safe mode” entail?

The built-in BMS is one of the amazing features of current lithium batteries (battery management system). The BMS performs a variety of cool functions to safeguard and condition your lithium battery, depending on the brand you choose.

The safe mode is a function that almost every BMS has. If you take your battery too low, this feature disconnects it from total drain.