Cherry Picker power options...

[NotJustin]

Hi all
I have a cherry picker and it's currently got a 3rd party float charger and two wet 6v batteries.
Problems is the charger tends to boil the batteries.
I'm thinking it's a bit mad anyway as I don't need a portable cherry picker as it is used exclusively around the perimeter of the building and is always within reach of the mains.
The batteries are a couple of years old but don't seem very happy.
Therefore I was thinking of either a transformer or maybe a AGM leisure battery as I realise a transformer would need to be meaty to supply the grunt the motor needs.
Wondered if anyone else had had this issue?
Cheers!

Edited 4 hours ago by NotJustin