Screenshot from a specification PDF, watermarked SD ASSOCIATION. A header says bits: 511:496, Description, width 16 The body of the description is "Maximum Current/Power Consumption This field indicates total current/power consumption of the card including enabled functions selected by the Function Selection ([399:376] bits) dependent on selected Bus Speed Mode. The host should check the maximum current consumption by mode 0 operation and verify that it can supply the necessary current/power before executing mode 1 operation. Especially in UHS-I or UHS-II mode, this field is related to Current Limit / Power Limit setting. CMD6 mode 0 indicates the maximum current/power of a selected bus speed mode regardless of the setting of Current Limit / Power Limit. CMD6 mode 1 indicates the maximum current/power of a selected bus speed mode depending on the setting of Current Limit. Definition for SD I/F Mode" Followed by table of Value, Maximum Current (Power) Consumption at 3.6V 0: ERROR 1: 1ma (3.6mW) 2: 2mA (7.2mW) 3: 3mA (10.8mW) ... 65,535: 65,353mA (235926mW)