David Kinsell wrote:

"David Kinsell" wrote in message
. ..

Mike the Strike wrote:

I am looking for a US source for a rechargeable (preferably gel or
sealed lead-acid) for the fin battery box of a Schempp-Hirth. I need
the extra power as well as the tail weight! Dimensions are
approximately 10 inches long, 4 inches wide and 1-1/2 inches deep.

I've found a few single-cell solutions that I could make work but
wondered if there was an off-the shelf item that would fit?

Thanks....

Mike

That 1 1/2 inch depth constraint really limits your options. Feel
fortunate if you can make up your own solution from single cells,
or find a battery shop to do it for you.

-Dave




bumper wrote:
Well it does limit the options, your right. However, ELK products
does have
a nice little 6 volt 7.5 amp hour that could be connect in series (2)
for a
12 volt 7.5 amp hour pack, or series parallel (4) for a 12 volt 15
amp hour
pack, and would fit (at least two of 'em would) as the smallest
dimension is
1.34 inches. These are sealed lead acid AGM batteries - - - bumper

ELK-0675 6 Volts, 7.5 Ah
ELK Sealed Lead Acid Batteries are excellent for the
following
applications with regard to size, Amp hour rating, and proper terminal
connections: battery backup (for Access Control Systems, Fire Alarm
Systems,
and Security Alarm Systems), emergency lights, lighted exit signs, and
uninterruptible power supplies.


SPECIFICATIONS:
. Nominal Voltage: 6 Volts
. Rated Capacity: 7.5 AH (20 hour rate)
. Length: 5.91" (150mm)
. Width: 1.34" (34mm)
. Height: 3.70" (94mm)
. Total Height w/ terminals: 3.90" (99mm)
. Weight: 3.08 lbs (1.4kg)
. Terminals: F1-Faston Tab No. 187




Top posting mistake corrected,

I'd call it a preference instead of a mistake, but I also prefer bottom
posting.

and formatting problems fixed.
Please folks, no top posting, it screws up the readability when
you do that. Particularly when the correct bottom-posting has
been established. It's like joining a thermal in the wrong
direction, but in this case, there's only one right way to
circle.

Back to the battery. Each battery has a length of almost
6 inches, so you can't fit even two of them in the 10 inches
provided. Four would take a real trash-masher to squeeze
them in.

Plus, you'd end up with a 12 volt battery trying to power
a 14 volt radio, so you'd get about half the rated capacity
before the transmitter craps out. But that's a little
too technical for this crowd.

Now, now, Dave, Mike didn't indicate it was for a 14 volt radio, or even
that it was for a radio at all. Maybe it's to back up his logger and
vario. And, 14 volts might not be compatible with his other battery(s).
Before prescribing solutions, the volt doctor should determine the problem!

--
Change "netto" to "net" to email me directly

Eric Greenwell
Washington State
USA