Just for a little clarification:

I'm unclear about the 'amperage' here. In other threads people were saying that the hobbico power core was weak due to the amperage - 1.2 amps. Is this different than having a 12v 1200mah battery?

I just got the heavy duty starter. There seems to be little difference between that and the regular '90' starter. I tried both with the power core 1.2 amp battery, and then with my car batter.

I then tried my '90' starter with my 14.4v power drill battery, and WOW! I think it's a 3amp battery. This is different than 3000mah?

I want to get two of the 7.2v rc car battery packs and wire them together with the above connector. Will there be a difference in cranking amps with different capacity batteries, or is the capacity strictly the length of time the battery will run?

Also, if my charger can charge up to 16 cells, can I just charge the packs while still connected in series?

I was not looking forward to taking my EE classes, but I'm so sick and tired of not knowing this stuff! Next semester hopefully I will be able to give advice and not have to ask