https://caterhamrepaircafe.org/Box3

This car, driven by a relatively new 6V gel cell, showed almost no signs of life.

After attempting a very gentle trickle charge it appeared that the battery was completely ruined.

It turned out that the new battery had been charged with a convenient 6V power block that the owner found ‘somewhere’.

After a detailed explanation of the hazards from exploding sealed lead-acid batteries, a replacement gel cell AND a suitable charger were bought!