Yes, that is what I remembered. When you increase the voltage drain, the mA drain also increases. So 1100 mah is not always equivalent when talking about 4.8 vs 6.0 volts. I agree on this and will go with higher mah's.

So, can the 6.0v batteries be effectively charged using the standard chargers? I seem to remember that this could be done but it just takes a longer time.