Re: [IP] Lithium battery in the cozmo
On 11/30/06, Mike Shamel <email @ redacted> wrote:
>
> > Has anyone else seen this with lithium batteries?
> >
> Hi Rick, No I do not use Lithium's in my pump. But this is predictable
> behavior. The discharge curve for alkaline batteries produces a slow and
> predictable voltage curve, So the pump manufactures set the alarm for a
> known voltage where a predictable amount of battery life is still left
> (mhA). The rechargeables (both Lithium and NiCD) have an abrupt drop-off
> voltage curve at the end of their discharge cycle. One of the reasons
> they
> are not recommended. By the time the alarm goes off you may only have
> moments instead of hours of battery life remaining. Not a problem if you
> always carry a spare.
> Mike
I believe you should say "that is why they are not recommended for use in a
Cozmo". I've used Lithium (non-rechargable) in my Animas pump and get a
very predictable amount of battery life once the meter drops off the top
scale. It will go at least another 10 days, but I have a tendency to go
ahead and change it the next chance I get, say when I change cartridges.
The Lithium AAs last me a little over three months.
George
.
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