From the specs of the 888 vs 833 -- the 888 takes a lot more juice, especially with Dante turned on:
888
All mic preamps off: 0.90 A, All mic preamps on: 1.12 A, All mic preamps on, 192 kHz sample rate, recording to 2 SD Cards: 1.29 A, All mic preamps on, 192 kHz sample rate, recording to 2 SD Cards, Dante enabled: 1.56 A; Intelligent power-down of unused mic preamps and other internal circuits
833
875 mA @ 12 V (10.5 W); Intelligent power-down of unused mic preamps and other internal circuits