Thanks. Yes, more than I needed to know. :-)
Chuck Norcutt
Ian Manners wrote:
> Hi Chuck,
>
>> * Do not use Nickel Cadmium batteries. "Use of rechargeable Ni-cad
>> batteries is not recommended. Due to higher internal amperage, the
>> electronics in your Ricoh camera/flash unit may be damaged. If damage
>> due to use of Ni-cad batteries occurs, the warranty will be considered
>> null and void"
>
> The reason is due to the chemical difference in the different
> type of battery material.
>
> Ni-Cad batteries have a lower internal resistance due to the
> materials used in that type of batteries construction.
>
>>From the electrical view, Ni-Cad batteries have a lower internal
> resistance which means that they are capable of delivering
> a much higher current into the same external resistive load
> in comparision to Carbon/Zinc batteries, this is for low
> resistive loads such as small motors and devices like
> earlier model flash's etc. In relation to the flash you will
> probably find that the thyristor or other device the flash
> utilises doesnt have sufficient heat release, or the electronics
> were simply not designed to have the higher current that
> NiCad batteries can deliver run through there circuits.
>
> It's also the same reason that you shouldnt use NiCad's
> in female vibrators, NiCad's overheat the motor leading
> to open circuit coils as there is nowere for the heat build
> up to escape due to the enclosed nature of the motor,
> there for it is recommended to use Zinc/Carbon batteries
> as there higher internal resistance will limit the current
> drawn from the battery, and will also limit the speed so
> the motor's carbon contacts dont fracture.
>
> More than you wanted to know hey :-)
>
> Cheers
> Ian Manners
> http://www.comkal.net/
>
> Those who are without sine shall be transformed...
>
>
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