ODC 420 and Sonar batteries

[TubeDude]

[cool][#0000ff]In times past, when we used round tubes, with smaller pockets, we used to strap on a small plastic index card box for 5X7 cards to hold our batteries. (See pic)[/#0000ff]
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[#0000ff]I have also rigged up a small cooler with styro compartments to sit down behind the seat.[/#0000ff]
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