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Subject: Re: Question about battery types and circuit boards.

Author: Robert Hyatt

Date: 11:23:01 04/05/04

Go up one level in this thread


On April 05, 2004 at 07:57:05, Mark Young wrote:

>On April 04, 2004 at 12:06:22, J. C. Boco wrote:
>
>>Hello all and good day to you.
>>
>>I have the Star Diamond.  I used some typical fresh alkaline batteries in it and
>>my Star Diamond ran for (I think it was) about 24 hours before I had to change
>>the 4 AA batteries.
>>
>>When the next set runs out, I'm going to put those newer batteries in, those
>>Duracell Ultra ones.  They claim to last longer, and of course they cost more.
>>I'm interested in whether these Ultra batteries will last 40+ hours or not.
>>
>>Anyway, I noticed that Energizer has AA batteries that are Lithium batteries,
>>made for digital cameras and regular cameras.  These cost a lot, $10 for 4 of
>>them.  Since they are AA and rated at 1.5V (just like all the other AA
>>batteries) I thought that it would be interesting to plug these Li batteries
>>into the Star Diamond.  Maybe it'll run for over 100 hours that way.  However,
>>one thing holds me back.....
>>
>>On the package it lists the mAHrs (milli amp hours).  This figure was 2000 or
>>2250, I don't recall  (but it must be a good battery if it has an Expert or
>>Master ranking.  Ha ha ha!).  But the other "regular" alkaline batteries (both
>>the regular and the ultra) had a number which was 250 mAHrs *less* than the
>>Lithium-type batteries.
>>
>>So voltage is the same but mAHrs is larger for the Li batteries.
>>
>>Is it safe to use these Li batteries in the Star Diamond?  Or anything else?
>>((Besides cameras of course, which it is advertised for)).
>
>Yes lithium batteries are safe to use, but it is more cost effective to by
>rechargeable NIMH. You pay more up front for the charger and batteries, but you
>always have batteries better then standard alkaline.
>
>Mine are over a year old and are rated at 1700mAh. There are better rechargeable
>batteries now that rival even lithium batteries.

You have to be careful.  Alkaline batteries produce 1.5 volts.  Rechargable
batteries are typically 1.2 volts.  A radio might not care whether it is a 4.8
volt or 6 volt (assuming 4 batts in series) but a computer might...




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