You can use a charger that can charge a 2s battery via an xt30 connector, you can also charge it using the USB C charging input of the radio.
Longer running time and safer use
This is a LIPO battery
Description
This battery is suitable for the RadioMaster BOXER remote control and TX16S remote control, with a battery life of over 3 hours Capacity: 6200mAh. Connector: JST-XH and XT30. Charge current: Max 2A. Weight: 203g. Fits RadioMaster BOXER Radio and TX16S series Radio