Nyal,

A picture would be best, but here's the narrative. I use hook locks (a
substantial step up from velcro) to mate the batteries. I place the
back (based on brand position) of the 2V against the terminal end of
the 12V about 1 inch above the bottom. This provides clearance at the
front of the battery tray and puts the 2V terminals slightly above the
12V terminals. I then use strapping tape to secure the attachment
between the hook and lock pads. I tested this arrangement by placing
both batteries in the tray of my Ventus 2 while trailering several
hundred miles. It has proven more than adequate. I inspect the bond
regularly and have found no weakening. Wiring is in series. Be sure to
include a fuse. If you have a strong interest, I'll be happy to forward
a photo. My wife uses the same set up in her LS-8. The 14V system has
dramatically improved the transmission quality and strength of her
Microair radio.

I am finding I can fly about 7 hours per 14V battery before I'm seeing
14.3V. I generally start the flight around 15.1V. I run an SN-10 with
one analog, Dittel FSG-2T, Cambridge Model 25 Data logger and read out,
a flap position LED, and gear warning.

With a 12V system, my SN-10 would start giving me voltage warning
around 4 hours and my radio would become discerably less reliable.

The PowerSonic model numbers are PS-1280 (12V) and PS-260 (2V). Rage
doesn't appear to carry the 1280 anymore. Try W&W.

Nyal Williams wrote:
Several questions about this thread.

1. How does one piggyback (physical sense) a 2 volt
batter on top of the twelve in a well (i.e. Discus)
that clamps securely around the 12v battery?

2. How does one identify the dimensions of all the
various 12v. batteries offered by ragebatteries? (I
just looked at the site suggested two posts back on
this thread.)

3. Has anyone ever manufactured a 14v. battery that
would be usable?



At 01:00 14 January 2005, wrote:
Udo,

After 20 years on a 12-volt system, I've returned to
14 volts,
completely eliminating all problems with battery life.
I'm using the PS
12/8 with a 2 volt piggy back. I am very happy with
the results. Like
Ken, I purchase my batteries from ragebattery.