Question for battery experts
 

I am looking to run a 3S1P A123 and 2S1P both 2300 mAh in series to basically get 10V and 4600 mAh which should in theory get me 138 continuous amps. Will this work?

You can't do this... Series means 3s1p + 2s1p = 5s1p

Parallel would be 2s1p + 2s1p = 2s1p

The packs have to be the same to do parallel

Thanks for that. I understand that in series I would get the voltage, but I am looking to get a higher available amp supply as well as a higher mAh. Any suggestions in how to do this?

Wouldn't 2s1p +2s1p = 2s2p if run parrallel? I'm not an expert but pretty sure thats right.

Going to Big House's question that means that if you run 3s1p +2s1p in series you have 5s1p which still leaves you with 2300mah. Packs must be equivalent to run in parrallel so no you can't do it, you could do 3s1p +3s1p = 3s2p which is what you want, about 10V 4600mah

^^ As said above each pack must contain the same number of cells if they are to be put in a parallel configuration. If the packs aren't that old you could just buy 1 more A123 cell and add it to the 2s1p pack to make it a 3s1p. Then you could parallel the two 3s1p packs without issue.