Date   : Fri, 09 Apr 2010 19:56:14 +0100
From   : mike@... (Mike Tomlinson)
Subject: Testing homemade Master battery pack

In article <e0622afa2f3aee1e7def2a8dc69c0800.squirrel@...>,
Tom Seddon <tom@...> writes

>does anybody have
>any hints on what I should do to test it?

just check for 4.5 volts on the connector plug.

> I was just going to leave the thing on
>overnight and check tomorrow that the batteries haven't exploded, or
>warmed up any... would this be enough of a test?

Hmm.  Did you fit the diode as well?  If not, better unplug the
batteries straightaway.

Acorn's battery packs were 3 AA Duracells in heatshrink wrap, wired in
series, and a diode was fitted to stop the Master trying to back-charge
the non-rechargeable Duracells.  The pack tucks neatly into the gap on
the left-hand of the keyboard, which just happens to be the right size.

Prior to that, Acorn had used a 3-cell battery holder taped to a metal
bracket which was fitted in the space where the Domesday SCSI board
goes.

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