Is there any particular reason, other than the cost (which doesn't seem very
different) that manufacturers send nicads with most rechargeable products
that don't warrant lithium ion cells ?
I've replaced nicads with nickel metal hydrides everywhere I could and had
great results. One slight exception is the Motorola HT-1000 radios we use
for the police auxiliary. NiMH packs work fine, but the radios, originally
calibrated for nicads, think the battery is getting weak and do their "weak
battery" chirp for hours before the radio actually dies. I presume NiMH
cells must have a little lower voltage than NiCds. Other than that little
problem, they work better, last longer (per charge and per replacement), and
don't show the memory effects that some people saw when we used nicads.
Karl
>> From: "David Scheidt" <dmscheidt@gmail.com>
>> > Lithium ion batteries have a short lifetime. They last about 24
>> > months from the date of manufacture. That's true if they're used, or
>> > not.
>>
>> Maybe Ni-MH batteries would be better. I've had my little Kodak digi
>> camera for 36 months, put a couple of thousand pix though it and pay
>> little attention to when I put it on the charging stand and when I don't.
>>
>
> The advantage -- and it really is singular -- of Li-ion batteries is
> power density. For a battery of a given mass, the Li-ion battery will
> hold more power than anything else except for some really exotic
> battery types, but it costs more, has a shorter lifespan, requires an
> expensive charging circuit, is more sensitive to temperature and
> storage conditions, and will wear out sitting on a shelf. The energy
> density means it has a longer run time, talk time, or more photos per
> charge, which is why everything has one.
> David Scheidt
> dmscheidt@gmail.com
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