Ego could probably add an ice auger attachment to the Multi-Tool line-up. If needed, it could be gear driven (reduced) to increase the torque required. Or there is this universal setup to adapt a drill:
Actually looks like somebody already beat Ego to the game with a 40V offering:
3A and 5A, so 120W and 200W batteries.
Brushless power head for Ice Fishing Auger. You wouldn't even need to make the flights and cutting blades which would allow anglers to choose from many available in the market.