Lead-acid batteries and lithium battery chargers cannot be used universally!
This is because - lead-acid battery chargers are generally set to two-stage or three-stage charging mode, and the voltage levels of lithium batteries and lead-acid batteries do not match. And there are many kinds of lithium batteries, and the battery performance and battery protection board parameters may be different.
Therefore, lithium batteries do not have universal battery chargers like lead-acid batteries. Generally speaking, lithium batteries are equipped with special chargers when they leave the factory. In order to protect the lithium batteries, it is best to use the corresponding special chargers for lithium batteries.