The device supports high current and high capacity batteries above 32.76 Amperes and 32.76 Ampere-Hours by switching to a times-ten mode where currents and capacities are internally handled correctly, but various reported units and configuration quantities are rescaled to tens of milliamps and tens of milliamp-hours. The need for this is due to the standardization of a two byte data command having a maximum representation of +/–32767. When the X10 bit (Bit 7) is set in the Pack Configuration register, all of the mAh, cWh, and mWh settings will take on a value of ten times normal. When this bit is set, the actual units for all capacity and energy parameters will be 10 mAh or Wh. This includes reporting of Remaining Capacity. This bit will also be used to rescale the current reporting to 10 times normal, up to +/–327 A. The actual resolution in that case becomes 10 mA.

It is important to know that setting the X10 flag does not actually change anything in the operation of the gauge. It serves as a notice to the host that the various reported values should be reinterpreted ten times higher. X10 Current measurement is achieved by calibrating the current gain to a value X10 lower than actually applied. Because the flag has no actual effect, it can be used to represent other scaling values. See Section 7.2.6.5.