[amsat-bb] Re: Batteries for FT 817

Ron Overdrive ronoverdrive at tehfurry.com
Mon Jun 21 09:34:49 PDT 2010

What you are seeing is over-charge which is normal. The battery should
settle around the 9.6v mark and last a while there. Even when charging my
Sanyo Superlatice Evo Cell 2700mah batteries I see over-charge. A good page
to look at regarding power consumption in the FT817 is
http://www.ka7oei.com/ft817_pwr.html . He sums up that a good way to
conserve power is to turn the IPO On, keep the NB Off, keep the Screen
Backlight Off, and stick to using the Front BNC connector will save the most
power. Wearing headphones and transmitting on lower power helps out too.

~73, KC2WQW

On Mon, Jun 21, 2010 at 12:12 PM, ANTHONY JAPHA <tjjapha at earthlink.net>wrote:

> I use 2 FT817s for portable ops, and have been disappointed in the battery
> performance.  Last year, I bought replacement batteries from Batteries
> America, the FNB-72xe, rated at 9.6v. at 2000mAh.  There's no noticable
> difference between these new batteries and the originals.
> The batteries charge to just over 11.0 volts, but quickly drop through 10
> volts, as indicated by the voltage reading that appears when the rigs are
> turned on.  Maybe this is just normal behavior for a 9.6 v. battery.  Is
> this what you would expect?  Has anyone found a battery with a higher
> voltage rating and/or one that will maintain a higher voltage for an
> appreciable period--and fits into the 817?  Every bit of power helps!
> Many tnx and 73,
> Tony, N2UN
> LM 183
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