Very recently someone posted a deep cycle that will fit perfectly. Check the
archives. Better still here is a copy of his email.

William

After extensive research on the Internet, I found a battery that will fit in
the aux batt compartment under driver's seat, WITHOUT modifying the
compartment.

Like many owners, I was attracted to the Optima yellow top, but didn't want
to modify either the battery or the compartment. This meant Optima batteries
wouldn't be suitable.

Fortunately I found the Hawker Odyssey PC 925 MJT battery.

Its advantages:
-- with dimensions of 7" x 6-3/8" x 5-3/4"h it fits the compartment easily
in any orientation
-- it is a sealed AGM battery that does not require venting.

-- its charging voltages similar to the starting battery, so it can share
the same AC charger
-- it can be deep-cycled
-- it generates enough cranking amps to start the vehicle if the starter
battery fails

I have now installed the Odyssey as the auxiliary battery in my '87
Westfalia and am running all the Fuse 3 loads (interior lights, radio
memory, lighter outlets, clock, etc.) off the battery. I hooked up a
charging system that I will describe in detail later.

Details on the batteries:

http://odysseyfactory.com

East coast source:  http://www.batterymart.com/battery.mv?c=odyssey

West coast source:  http://odysseybatteries.com/auto.htm

If you are near a Batteries Plus store they may be able to order it for you:

http://batteriesplus.com/Product/slacidrechg.html

Location of the vendor is important: the batteries are heavy and shipping
over distance can get expensive.

Chris Earl

'87 Westy

>      Has anyone found a deep cycle battery that will fit where the main
battery goes under the passenger seat?  This current battery is a type 42
and goes in a 1987 GL Camper. Thanks...

>      Has anyone found a deep cycle battery that will fit where the main
battery goes under the passenger seat?  This current battery is a type 42
and goes in a 1987 GL Camper. Thanks...