AA NiMH Best Deal

"TD" wrote

Thanks, but I was really hoping for some rechargeable AA Lithium batteries
to plug into my the battery compartment of my handheld GPS. My experience
with disposable AA Li batteries is that they last a heck of alot longer
than
2300 mAH NiMH AA`s. So I was hoping for something in this generic form.
The key of course, is the compartment size issue.

Tien

You do realize that Lithium ion batteries need a pretty sophisticated
charger to keep them from blowing up, right? You could buy a couple three
sets of NiMH batteries, and a charger, before you could buy the lithium
charger. #2 problem is that lithium batteries are 3 volts per cell, so you
can't do a straight swap in an AA battery pack.
--
Jim in NC


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"Morgans" wrote in message
...

You do realize that Lithium ion batteries need a pretty sophisticated
charger to keep them from blowing up, right? You could buy a couple three
sets of NiMH batteries, and a charger, before you could buy the lithium
charger. #2 problem is that lithium batteries are 3 volts per cell, so
you
can't do a straight swap in an AA battery pack.

Even using a sophisticated charger, many Radio Control flyers remove their
Lithium battery from the airplane and charge it in a remote location, away
from other people, buildings, cars, etc. - just in case.

Rich S.

"Rich S." wrote in message news:S-
Even using a sophisticated charger, many Radio Control flyers remove their
Lithium battery from the airplane and charge it in a remote location, away
from other people, buildings, cars, etc. - just in case.

What makes this necessary for RC planes` Li batteries? I don`t
recharge my digital camcorder or digital camera in the shed to avoid
explosions! Or should I start doing that?!

Tien

"TD" wrote in message
m...
"Rich S." wrote in message news:S-
Even using a sophisticated charger, many Radio Control flyers remove
their
Lithium battery from the airplane and charge it in a remote location,
away
from other people, buildings, cars, etc. - just in case.

What makes this necessary for RC planes` Li batteries? I don`t
recharge my digital camcorder or digital camera in the shed to avoid
explosions! Or should I start doing that?!

Tien

Many times the modeler is using faster charge rates than the low-amperage
"wall-warts" which come with camcorders, etc. The risk of the battery
swelling, leaking, heating or exploding increases along with the charging
amperage. There is also the occasional case where someone uses a ni-cad
charger for Lithium/Ion or Lithium/Poly cells, or misadjusts a multi-mode
charger. There have been enough incidents now that most flying fields
require that battery charging be done waaaay over there!

Rich S.

(TD) wrote in message om...
"Rich S." wrote in message news:S-
Even using a sophisticated charger, many Radio Control flyers remove their
Lithium battery from the airplane and charge it in a remote location, away
from other people, buildings, cars, etc. - just in case.

What makes this necessary for RC planes` Li batteries? I don`t
recharge my digital camcorder or digital camera in the shed to avoid
explosions! Or should I start doing that?!

Tien

They can blow up if overcharged.
One can acheive full charge without by charging them at a constant
4.2v/cell. Not as fast as a sophisticated charger, though.

They are nice and light. Since they have this problem, you have to
order them from overseas places. There are a couple around.

Bill Hale