On Thu, 10 May 2012 22:33:04 +0100, Rick Hughes wrote:

Any boat store will sell these - they cut your battery to make sure you
have enough power to start engine

Any half decent boat doesn't use the engine battery for general
"house" electricals. But such a device is still a good idea with deep
discharge batteries.

As for Mr Lamb's battery it's dead, it's not worth the faffing about
trying to resurect and even if it can be brought back it will still
be unreliable. Weigh it in.

--
Cheers
Dave.