Hi westward
You can obtain all battery types in a range of voltages and with different current capacities:
SLA are 2v per cell and are typically available as: 6v; 12v; 24v. Capacity can range from 1amp to 18amp in the smaller sizes but leisure and vehicle batteries are much higher amps , bigger and heavier.
NiCd batteries are no longer produced due to their damage to landfill enviromental sites. They have been replaced by NiMh batteries.
NiMh batteries are 1.2v per cell and are typically available as: 1.2v; 4.8v; 6v; 7.2v; 8.4v; 9.6v; 12v etc. Capacity can range from 0.5amp to 10amp in the smaller sizes but you can buy much higher values from specialist suppliers.
Dry cells are 1.5v per cell and are typically used for low powered domestic items like torches and remote controls. They are suitable for use with R/c equipment and I use them in my FlySky FSi6 transmitter as they easily last all season.
To summarise:
SLA are good if you need lots of ballast in your model, say a tug or large liner. Not so good for fast planeing type craft due to their weight and relatively high internal resistance which limits the current.
NiMh are good as a light weight high capacity power source for faster models as their internal resistance is relatively low compared to SLAs but are equally as suitable for more sedate scale models.
Dry cells are not really suitable for powering a motor in all but the smallest toy models due to their low capacity and high cost for just a single use.
LiPos are suitable for all types of models but need careful handling and are not really suitable for novice modellers without guidance from a more experienced and knowledgeable person.
Finally all batteries are marked with warnings on how to dispose and hopefully, if we all follow the instructions, we all remain safe.
dave976
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