[bookcourier] Re: Sapping batteries - a helpful warning
- From: "Darren Brewer" <darren.m.brewer@xxxxxxxxxxxxxxxx>
- To: <bookcourier@xxxxxxxxxxxxx>
- Date: Mon, 6 Jun 2005 22:45:15 +0100
Hi Lester
Glad you posted that and not me lol. It's not rocket science but then
again neither is it something many people will do unless they are into
fiddling with electronics like some of us. But like the great Richard
Feynman I love to know how and why things work. Always have and always will.
Darren.
----- Original Message -----
From: "A. Lester Buck III" <bookcourier-reg@xxxxxxxxxxx>
To: <bookcourier@xxxxxxxxxxxxx>
Sent: Monday, June 06, 2005 10:34 PM
Subject: [bookcourier] Re: Sapping batteries - a helpful warning
>
> Sure, I'd be happy to describe the procedure. This isn't necessarily
> very simple with low vision, but maybe a friend could help.
>
> Leave the cover off the Book Courier battery compartment. While it is
> operating in the mode of interest (reading a book, playing an MP3,
> shutdown), use the sharp pointed probes on the digital multimeter and
> measure the voltage across either one or both (in series) batteries. If
> the current is of interest, there are "fake batteries", little empty
> battery shapes with terminals on either end that can be wired into
> whatever and can thus measure current in circuit.
>
> There are also many types of "battery tester" that put batteries under
> load. The problem with them is that it is not clear what the correct
> load is for each mode of the Book Courier.
>
> Some battery rechargers for rechargeables includes a built in tester.
> (Of course, the recharger must have some tester that tells it when to
> stop charging. I am referring to a gauge for the humans.)
>
> Also, as part of the marketing, at least one battery brand in the US
> used to include a tester built into the package, so that one could test
> the battery by pressing a button without opening or buying the
> batteries. It was sort of an chemical display that showed red or green
> on a line depending on the charge level. I don't know what load (if
> any) such battery packages actually applied during the test.
>
> By the way, with some Book Couriers apparently dropping dead when people
> breath on them the wrong way, there is obviously some risk in performing
> any measurement. Certainly I am not proposing this as a standard thing
> to do to anyone's or everyone's Book Courier. That's what the builtin
> battery gauge is for.
>
> I'd probably do these tests myself but I live in Houston and my father's
> Book Courier is in San Antonio.
>
>
> Best regards,
>
> Lester
>
>
>
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