switched to the lithium ion flasher battery?
We tried this 8 or so years ago. The BMS on the batteries we tried didn't work, the Electra 12000 dp pulled too much current at startup, causing the battery to internally shutoff. That was with the predecessor to the Dakota, the Clean Republic Bamboo Lithium. I sold the auger before the Dakota branded version came out, so never tried other options.
I believe I noticed the of the Amped 12ah might be higher (20a)? I'd call and talk with Matt about it, he might have additional info from other users. Now that I'm thinking about it, I would be excited to try something like the m18 high demand, they would likely work AND would give you more RPM. Those Electras turn painfully slow.