The A2 and A10 are fantastic for their portability; however, there is no means to recharge the battery away from a mains supply.
Add "in-flash" charging.
Could be implemented in one of several way:
1) USB-C PD input to the flash, flash can power itself from a USB-C PD battery pack and charge the installed battery
2) USB-C PD input on the battery, battery is recharged direct from USB-C PD battery pack. Has the advantage that the battery can be recharged away from the flash
3) USB-C PD input to the charger. Could likely do away with a mains charger, and use a USB-C PD mains adapter instead. Or could use a USB-C PD battery pack
