Good Evening,

Most recently, I found one at WalMart that I am very pleased with.  I've
put pigtails on three cars, and move it between them as needed.  The one
I have in my Vanagon, that I built in, came from a RV supply store.
It's specifically designed to be permanently mounted in an engine
compartment (weatherproof metal case, heavy leads).  I don't recall it's
brand.  It was "less cheap", but not prohibitive.

Here are the specifications for the WalMart unit:
The Schumacher SpeedCharge maintains both 6- and 12-volt batteries,
keeping them at full-charge using float-mode monitoring. Perfect for
charging small and large batteries found on motorcycles, classic cars,
RVs, boats and more. Includes a set of quick-connect harnesses for
permanent attachment of ring connectors.

    *     1.5-amp charger and maintainer
    *     For both 6- and 12-volt batteries
    *     Microprocessor controlled/ fully automatic switches to
      float-mode monitoring when battery is at full charge
    *     LED indicator lights show charging, charged and trouble
      Quick-disconnect harness snaps either connector into place in seconds
    *     Reverse-hookup protection
    *     Model SEM-1562a
    *     2.5-lbs.

A useful link:
http://www.walmart.com/ip/Schumacher-SpeedCharge-Battery-Maintainer-and-Charger/13005742#Item+Description

*Best Regards,
Jon*

Scott Daniel - Turbovans wrote:
> hi,
> where are you buying you low cost 'maintainer' battery charges.
>
> built-in on board is neat.
> ----- Original Message ----- From: "Jon Kanas" <kanas@QADAS.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Wednesday, August 31, 2011 9:02 AM
> Subject: Battery Sages
>