Either it is not receiving charge (unlikely) or there is a short in the
pack somewhere. Time to replace. The reason it false peaks at higher
current is because the higher the charging current the less efficient the
conversion of electrical energy to chemical charge. Low efficiency of
conversion combined with high charge rate (the charger has no mercy)
results in high heat, and escaping electrolyte gasses. Repeated charging
at these very high rates will degrade the battery faster than using the
recommended C/10 rate (22ma for 16 hours).
I would recommend you find a cheap charger that can charge at 22ma
continuous (Hobbico) or use Sirius pulsed fast charger designed for HLG
batteries. But you will definitely need a new battery. Bring the old to a
hardware store, Radio Shack, Batteries Plus or someone who recycles them.
Radio packs have a higher impedence than motor batteries. They are designed
to put out smaller current for longer periods, and they have a much lower
self-discharge rate. Likewise they can't take charging at high currents
either, because the high impedence makes them overheat at high current. If
I remember right, the construction of the cells that makes them higher
impedence is more plates that are closer to each other than lower impedence
cells. These close plates can build a "stalagmite" between the plates due
to fast charging or overcharging at continuous current which eventually
makes contact with the adjacent plate causing either reduced capacity, or
complete failure (loss of voltage).
SR batteries are the best NiCads available to us, and not that much more
money. They can stand fast charging better than stock Sanyos, but still
best not to exceed C/1, and prefer C/10 for most of the charges. They
contract battery makers such as Sanyo and others to manufacture batteries
to the state of the art and sell most of them for mil-spec applications,
like R/C modelling.
Hope this helps, good luck.
Rich Hollyday
Hollyday Designs
http://www.hollyday.com/
[EMAIL PROTECTED]
919-832-0199
At 10:52 AM 12/30/1999 EST, you wrote:
>Can someone give me a quick answer? It's a warm day and I want to fly, not
>crash! For some reason after leaving my 225 mah battery in my fiberglass
>fuse, disconnected from rx and servos, this am it was totally discharged
>after being charged last night. Can't imagine how this happened...does
>fiberglass conduct? I had lead weights in the nose, but they were not
>touching as far as I can tell. The problem is, it doesn't seem to charge on
>my Astro 110D, and keeps false peaking after 10 or 15 mah. Seems to charge
>better at .2mah than .4 ie false peaks faster on .4, where before 0.4 used
to
>do fine. What happened?
>Rodger
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