No. In a 2.4 Volt battery there is more "Juice" for the battery to last longer and perform better. Also a 2.4 battery is capable of powering things that are a bit more advanced and sophisticated.
it will be too much of a jump. i would recconmend a 2s (7.4V) lipo battery
Yes, if the two 6 volt batteries were connected together in series.
No.
lithium-ion battery
Two 6 volt batteries in series, yes. In parallel, no.
The charger needs to be set to charge for the voltage that the battery is designed to produce. Most car batteries are 12 volt batteries.
use two 12 volt batteries in series.
They make a 7.5 volt battery when put together
A 3 volt battery is a battery that produces 3 volts. Many watch batteries produce 3 volts.
The Ever Ready company issued a "PP" series of batteries (standing for 'power pack'), and the PP3 was the small nine-volt battery in that series.
If you have two 6 volt batteries you can take a jumper wire and connect the negative post on one battery to the positive post on the other battery then connect the remaining pos and neg posts to the 12 volt battery charger.
That is Impossible. You can however make two 6 volt batteries into a 12 volt system by wiring the two 6 volts batteries in Series. You will then have an output voltage of 12 volts but the amperes will only be what one of the batteries have, In other words the volts will double but the amps will stay the same as if you only had 1 battery connected.