When these stages kick in, they will cause pretty much every good quality LiFePO4 battery on the market with an internal BMS to go into high voltage disconnect protection mode at around 15.0V - the battery goes open circuit and the charger and all loads disconnect before starting all over again once it resets (if it auto resets - not all BMS will do this automatically). Many lead acid chargers have equalization as an automatic stage that cannot be turned off. It can heavily reduce the life of the cells due to regular over voltage charging or cause irreversible damage to the battery. This is really important to correctly charge and to maintain lead acid batteries, to avoid stratification of the electrolyte and ensure proper voltage equalisation of the cells, but are definitely not suitable for LiFePO4 batteries.

Many lead acid chargers have desulphation and equalisation stages built in, which will pulse high voltages of 15.3-15.8V into the battery. Lithium batteries require a Constant current/Constant voltage (CC/CV) charge type with simple Bulk, Absorption, Float stages.

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