Date   : Fri, 07 Apr 2000 09:23:54 +0100
From   : Tim Fardell <timf@...>
Subject: Re: BBC Master 128 batteries

My Master 128 contains just a pack of three normal alkaline (Duracell)
AA-size batteries, sealed in (presumably) heat-shrink tubing. Therefore,
the voltage would be 4.5v. The pack is wedged down the left of the
keyboard between the keyboard and the outer case. 

Any old 4.5v battery would probably do, but the cheapest way is just to
use three new Alkaline AA cells. The current consumption would be
miniscule, so such a pack should last you a good few years. 

You don't need to worry about the capacity (mAh - milliampere-hour)
rating of the battery. A higher capacity will simply last you longer.
But the voltage must be right. 

HTH

Tim. 


Isabel Cisternas and Robert Schmidt wrote:
> 
> Hi Kevin,
> 
> I'm afraid I can't help you directly, but I'm sending this reply to the
> BBC micro mailing list, and hopefully somebody there can.
> 
> Best regards,
> robert
> 
> Kevin Etheridge wrote:
> >
> > Hi there
> >
> > I hope you can help me. I have recently dug my old Master 128 out of
> > storage, to use again, but when I placed it into storage many moons ago,
> > took out the batteries for the backed up RAM and threw them away. Mt
> > question is now, to replace them , but I need to know what strength lithium
> > cells to use. 800milli-amps , 1300 or what. I do not wish to screw up my
> > micro by puting stronger strength batteries in. there is nothing to say how
> > strong in any of my user guides or the literature that came with the new
> > battery nest, so I wondered if yourself, or anyone else may know what
> > strength to use. I want to be able to use my micro again, and play all the
> > games that I originally left boxed up years ago.
> >
> > I look forward to hearing from you.
> >
> > kind regards and thanks in advance
> >
> > kevin etheridge
> >
> > Kevin Etheridge
> > 107 Tanyard Way
> > Horley
> > Surrey
> > England
> > RH6 9PF
> > kevinetheridge@...
> > or
> > kevin.etheridge@...

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