![]() Applying an equalization charge of 15v+ to a lithium battery will damage the cells beyond repair. Lithium batteries do not require any form of equalization. On some chargers, this mode may be automatic which can’t be turned off. Most if not all lead acid chargers have an equalization mode. This happens if the charger is undersized for the battery bank or there are loads running on the system and not allowing the charger to reduce the current below the transition point. The absorption stage is also time based, if the charger is still in its absorption phase after 4 hours, the charger will automatically transition to the float stage. Once the current reduces to approximately ≤10 % of the chargers total output, it will then move to the float state. In this charge phase the charger will hold the maximum voltage for the chosen battery and charge the battery with reduced current as the batteries internal resistance can’t accept the charge current at maximum output. This system allows fast charging without the risk of over-charging and is suitable for Li-ion and other battery types. ![]() The current then reduces as the battery becomes fully charged. The charger limits the amount of current to a pre-set level until the battery reaches a pre-set voltage level. Lithium chargers are based on a constant voltage/constant current charge algorithm. While lead acid offers a degree of flexibility in terms of voltage cut off, manufacturers of LiFePO4 cells are very strict on the correct setting because Li-ion cannot accept overcharge. The differences with Li-ion lie in a higher voltage per cell, tighter voltage tolerances and the absence of trickle or float charge at full charge. As you can see, there is very narrow window of voltage with lithium, less than 0.5V over 80% capacity.Ī Lithium LiFePO4 charger is a voltage-limiting device that has similarities to the lead acid system. A lithium battery at 20% capacity will hold voltage around 13V, its lead acid cousin will be approximately 11.8v at the same capacity. ![]() Its lead acid equivalent will be approximately 12.6-12.7v. Lithium batteries different to lead acid batteries and not all battery chargers are the same.Ī 12v lithium LiFePO4 battery fully charged to 100% will hold voltage around 13.3-13.4v. This is a question we get asked every day. Browse Home, Office & Security BatteriesĬan a lithium battery be charged with a lead acid charger?.Browse Motorbike & Powersports Batteries.Browse Camping, Caravan & 4WD Batteries. ![]()
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