How come DJI uses 4.3~ volts instead of the norm of 4.2? 6s should be around 25.2 at 100% charge state. Hyperion, Pulse, TP all state that 4.2 is the max voltage per cell. Just trying to figure out why DJI set it to 4.3

How come DJI uses 4.3~ volts instead of the norm of 4.2? 6s should be around 25.2 at 100% charge state. Hyperion, Pulse, TP all state that 4.2 is the max voltage per cell. Just trying to figure out why DJI set it to 4.3