should be ok

In hornet 2 I had 2 12v packs of 2.4Ah nicads wired in series to give me 24v. Even with a mag and two 18v drill motors going full pelt in the arena I only ever drew around 1.2Ah from them. Although if you will be doing a lot of pushing then you will probably draw more.

Best way to find out would be to wire it up and try it out.