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Amazon.com: Tenergy High Drain AA AAA C and D Battery, 1.2V Rechargeable NiMH Batteries Combo, 8-Pack 2500mAh AA Cells, 8-Pack 1000mAh AAA Cells, 4-Pack 5000mAh C Cells and 4-Pack 10000mAh D Cell
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Popular Mechanics Battery Converter AA to C and D Size Battery Spacer Converter Case Turns AA Batteries into C and D Pm-P913N612 - The Home Depot
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