What battery

[Tony Griffiths]

Hi Tatenlyle
If you are literally using a lot of water what sort of running are you doing? If not already so, charging can easily be arranged for reduced or no and/or selected rates on all models. Many find a  little more than balanced output option backed by a smart bench charger the way to go.  And there are various voltage control gadgets availablefor for the standard cars and apparently work even on simple adoption of 12v  but I have no experience of. All been covered recently.
I dont know if any modern batteries claim to be calcium but if so the original system unless used very carefully is especially unsuited.

Hi Bob, do tell us more about the "calcium" problem.