Couple trips in now, a 5a battery will get about 15-20 holes in 7″, 20-30 in 4-5″. Auger bits may be a bit off so YMMV.
A bit disappointed in the amount of holes, will probably get a lite flight or pistol bit and see if I can extend it out.
The weight difference is phenomenal tho, easily carry the auger and sonar from spot to spot. Hard to imagine this won’t beat the crap out of a drill tho, not so much the drill part but setting it down, sitting in sled, usual ice fish trip stuff. Just my 2 cents