I have a selection of Milwaukee 18 volt tools, and a batch of batteries, all the NiCd type. I was pining for a cordless angle grinder, Milwaukee makes one now but it is listed as using the Li-ion battery. Can I use the batteries I have on this tool, or would I have to have yet another syle of battery and charger around?

http://www.cpomilwaukee.com/milwaukee-2680-20-18v-cordless-m18-4-1-2-in-cut-off-grinder--tool-only-/miln2680-20,default,pd.html?ref=nextag2680-20