OK so I have one of these being delivered to my home, it's a 9.6v tx pack, no problem.
However the thought occured to me that these now come in many varied sizes and voltages so--- can you take two 4v units and connect in series and get an 8v unit? Or indeed a 4.5v unit and connect in series to a 6v and end up with 10.5v? This was often done in the old days using NiCd's ie just stick another 1.2v AA size in series and up the voltage to whatever, but is this still the case with these newer batteries?
I'm interested as I need 8-12v for my drive pack, but it would be far easier if I could use two smaller batteries in series due to space limitations - they could be in different parts of the hull.