I saw one recently especially designed for sou'paws. Was quite tempted but
went for the sou'paw left handed scissors instead.
jh
----- Original Message -----
From: "Bill Pearce" <bs.pearce@xxxxxxx>
To: "'Olympus Camera Discussion'" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Thursday, December 16, 2010 6:02 PM
Subject: Re: [OM] Battery types [was - iPods from Apple]
>I recently got a powered screwdriver, a Bosch. It says it has NiMH. It
>holds
> a charge for a really long time and lasts forever.
>
>
>
> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> Sent: Thursday, December 16, 2010 1:57 PM
> To: Olympus Camera Discussion
> Subject: Re: [OM] Battery types [was - iPods from Apple]
>
>
>
> I think the perseverance of NiCd cells in certain applications is
> readily understandable in terms of the rate of self discharge. NiCd
> cells (until recently) have had much lower self discharge rates than
> NiMH cells. NiCD persists for a walkie-talkie or portable drill since
> you haven't been able to count on an NiMH powered device to have any
> charge left if you haven't used it in 3-6 months.
>
> But that all started to change recently. You may recall the
> announcement posted here the other day by Tim Hughes concerning three
> new types of NiMH batteries from Sanyo Eneloop. The newest cells
> promise 75% power after 3 years sitting on the shelf. That's probably
> better than NiCd, maybe even much better.
>
> Also, I note that drill drivers are starting to show up that have
> lithium-ion batteries. The last I noticed they were expensive enough
> that I wasn't willing to replace my own NiCD powered drill but the next
> power tool purchase could be something different.
>
> Chuck Norcutt
>
>
> On 12/16/2010 12:54 PM, Jan Steinman wrote:
>>> From: Moose<olymoose@xxxxxxxxx>
>>>
>>> On 12/15/2010 11:00 AM, Jan Steinman wrote:
>>>> Although it's open on my desktop, I've not looked at the
>>>> BatteryUniversity.com site yet, but my understanding of classic
>>>> NiCd is that repeated incomplete discharging to about the same
>>>> level causes a crystalline precipitate to form at a certain
>>>> location related to the discharge depth, therefore causing the
>>>> mis-named "memory effect." (It should really be called the
>>>> "forget effect." :-)
>>>>
>>>> Memory effect is not a problem when the cell is repeatedly
>>>> discharged to different levels. Classic case: a cop runs a
>>>> walkie-talkie for eight hours a day and drops it in the charger
>>>> overnight -- bad news for NiCd cell life. But memory effect is
>>>> not likely if you're using a flash or motor drive for various
>>>> periods of time and then topping off on a charger.
>>>
>>> "Among rechargeable batteries, nickel-cadmium remains a popular
>>> choice for two-way radios,"
>>>
>>> Since what you say here doesn't agree with what's on that site,
>>> perhaps you might read it and resolve the differences.
>>
>> Yea, I'll have to check that out, because it doesn't go along with my
>> experience as a ham-radio operator, my work as a repair tech in a
>> two-way communications shop, nor my stint as an RF engineer.
>>
>> I don't know of any hams who still use NiCd cells in their two-way
>> radios, but note that the OEM battery packs you get from Icom for
>> older radios still have them. Perhaps its just because NiCd's are
>> still cheaper. (New hand-held ham gear is almost all lithium
>> powered.)
>>
>> NiCds do have lower internal resistance than NiMH, which might make
>> them preferable in high-current applications -- like photo strobes.
>> But that wouldn't explain hand-held radios, which have relatively
>> moderate current needs. And if they're so good for hand-helds, why
>> don't you ever see them in cell phones? Puzzle.
>>
>> But such fun has to wait. I have to go pick up a buck to romance our
>> four Nubian goats today.
>>
>> Obligatory camera content: I need to take some photos of our
>> zero-mile raw goat milk ice cream... if there's any left...
>>
>> ---------------- Religions are the great fairy tales of conscience.
>> -- George Santayana :::: Jan Steinman, EcoReality Co-op ::::
>>
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