Lithium iron phosphate battery to nickel means that it may increase a little internal resistance, but in order to be reliable this connection should be.
At high temperature or overcharge, it will not collapse and heat up or form strong oxidizing substances like lithium cobaltate, so it has good safety. After 7 days of zero voltage storage, the battery has no leakage, good performance and 100% capacity; After 30 days of storage, no leakage, good performance, capacity of 98%; After 30 days of storage, the battery is charged and discharged for 3 more cycles, and the capacity is restored to 100%.