Rear mounted dual batteries.
In years past, these Delco Voyagers were exceptional batteries, with 8-year-plus lifetimes (I have a pair in a different rig nearly 10 years old that still seem quite healthy).
They are a ''flooded'' type battery, however their sealed-case vent design did an exceptional job of containing the electrolyte (no issues with leakage or terminal corrosion). Unfortunately Delco changed their design since the ones pictured here, adding removable 3-cell vent bar caps like seen on numerous other brand batteries (which brings having to check the water levels occasionally). The caps don't seal to the case as well after you've removed them a couple times, requiring a bit of Teflon tape to reseal properly (at least they don't leak THROUGH the vents like ones on many other batteries do). The last pair I bought lasted about 5 years, so apparently a little shorter-lived also.
Too bad... So many (used to be) great products out there that change for the worse.
In spite of it all however, the Voyager still compares favorably when priced against most of the costly AGM offerings that are out there, though it's not by the hugely wide margin they used to. I'll continue to use them since they remain one of few flooded batteries that don't leak when the electrolyte sloshes from vehicle motions (this after you've resealed the vent caps anyway).
Update:
One of the Delcos in my other rig finally bit the dust after nearly 12 years! So I've taken the ones from the BII to put in that rig, and now have a pair of Deka Marine Master (maintenance-free) units for the BII now. Same thing as before, I had to teflon tape-seal the vent caps, but being made by the same company as the old original Voyager (pictured) I'm hopin' they will be the last ones I buy for awhile. We'll see...
