on 6/18/02 1:17 PM, Eric L. Strobel at fyzycyst_at_comcast.net wrote:
>
> on 6/18/02 11:11 AM, Johannes Wolf at mp2100_at_mail-gw.estec.esa.nl wrote:
>
>> Nope, thats not true,
>> I used 1200mAh NiMH cells in my MP120 for 2 years without having any
>> problem.
>>
>> Johannes
>>
>>> -----Original Message-----
>>> From: newtontalk-bounce_at_newtontalk.net
>>> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Robert Benschop
>>> Sent: Tuesday, June 18, 2002 4:57 PM
>>> To: NewtonTalk
>>> Subject: Re: [NTLK] NIMH AA battery level
>>>
>>>
>>>
>>> on 18-06-2002 3:50, Rob Frohne at frohro_at_wwc.edu wrote:
>>>
>>>> Ah ha! Now I understand. I'll have to try that. I'm using NiMH
>>>> rechargables, and found that the Newton charger wouldn't recharge them.
>>>> I'll have to try your suggestion!
>>>
>>> Take care, 1x0 models only take NiCD batteries AFAIK.
>>>
>
> Interestingly, the FAQ (II.B.6) states that NiCAD or NiMH rechargeables can
> be used. HOWEVER... Have a look at the following link from the list
> archives...
>
> http://marc.theaimsgroup.com/?l=newtontalk&m=101411730531235&w=2
>
> The key paragraph is:
>
>>
>> Only use NiCad Batteries Do not Use NiMH The reason is that those cells
>> require charge characteristics that are much different from what NiCd cells
>> require. The charge circuitry of the Newton 110 / 120 / 130 models was
>> designed for charging NiCd cells and can't provide these charge
>> characteristics. Ignoring this would mean the NiMH cells would never be
>> charged in a way required to maintain their optimal > perfomance, and there
>> is
>> a more-than-average chance that they would be harmed over time.
>
> Going back and looking at that, I think that link should be used to update
> the FAQ on this topic.
>
> - Eric.
And to follow up further...
The "harmed over time" mentioned above can (based on my reading of the
various battery threads) potentially include overheating/meltdown of the
NiMH cells, resulting in damage to your Newt.
- Eric.
--Eric Strobel (fyzycyst_at_NOSPAM^mailaps.org)
===================================================================== Design is an iterative process. The necessary number of iterations is one more than the number you have currently done. This is true at any point in time. =====================================================================
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