In message , Julian
writes
Buy another one, batteries are consumable items and are cheap! Next
time you lay-up a vehicle, pull one of the battery leads off (negative
is best) and trickle charge the battery periodically or invest in a
little 'wall wart' style battery charger that can be left connected
permanently.

And don't skimp on the battery size to save pennies. Fit the biggest
that will go in the battery bay.

--
Clive Mitchell
http://www.bigclive.com