ben.mcgeever
Contributor
Just pulled the trigger on buying a Blacktip. Wondered about whether these batteries would fit given the larger 21700s - Milwaukee M18 High Output HD 12.0?
Congrats, hope you like it.
The Milwaukee batteries will not fit unless you find some adapter. We don't support this or do any testing with Milwaukee batteries. As far as I'm aware Milwaukee have done nothing to support shipping or travel, so all the big batteries require hazmat shipping and cannot be flown.
http://documents.milwaukeetool.com/eService/5255a096dc304b14b1a00eae72fbcc30.pdf
So unless you are really vested in the Milwaukee ecosystem, there are no positives and some pretty big negatives.