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Im not sure but I have a similar Sanyo DW-1000 and i'm sure I taped the batteries side by side face down and used a small piece of metal to join the two contacts making a similar size battery. I may be be wrong though, age does wonderful things, simple things, like the self belief that you once came up with an act of greatness for a simple solution, that really, may be just a smoke screen for a total failure, for the many hours spent over a random objective that was obviously way out of the reach for my below average skillset.
:)