Dji has designed the BS3O to charge the TB3O batteries. The BS30 has a built-in charger that allows you to charge 2 batteries in a short time. There is room for 8 TB30 batteries and 2 WB37 batteries of the DJI RC Plus.
This BS30 is included with the purchase of a DJI M3O (T) or can be purchased separately as a spare charger.