Connect the charger to your battery and set it to the boost charge mode. The charger will apply a high-current charge to your battery, which can help wake it up. If the basic recovery methods fail to wake up your sleeping lithium-ion battery, you may need to consider advanced recovery methods.
Boost and wake-up capability are features present in some battery chargers that can help recover sleeping lithium-ion batteries. These features apply a high current pulse to the battery, which can wake it up from its deep sleep mode. However, it is important to note that not all battery chargers have these features.
If the battery is completely dead, it may take longer to charge. If your standard charger is not able to wake up your sleeping battery, you can try applying a boost charge. A boost charge is a high-current charge that can help revive a dead battery. However, it is important to note that not all battery chargers have a boost charge feature.
Li-ion batteries are more delicate than other systems, and reversing the voltage might result in irreparable damage. 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.
Some LiFePO4 batteries have a self-recovery feature where they wake themselves up after all loads have been disconnected. It may be that your battery voltage rebounds after a little rest. For instance, mine jumped back up to 9.89 volts. But if your battery voltage is still very low, such as 5 volts or less, it’s likely in sleep mode.
Pick a fuse with an amp rating less than or equal to the smallest of these numbers. Wait a few minutes for the other battery to wake your sleeping LiFePO4 battery. Wait for the amount of time specified in your battery manual, if there is one. Of the brands I’ve used and researched, they usually recommend waiting 1-3 minutes.