You can choose a fast charge or slow charge charger based on the characteristics of the lithium battery.
The fast charging current, which is 3C standard, is 16*3=48A. Of course, this large current must be approved by the manufacturer before it can be used. Otherwise, choose a slightly lower current, such as 1C=16A, and the charging time is 1 hour.
The slow charging current is 0.3C=5.3A. This is the safest method, but the charging time is relatively long.