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Amazon.com: 14.4V 3200mAh i7 Battery Replacement for iRobot Roomba e and i Series, Large Capacity Battery Compatible with Roomba i7 i7+ i8 i6 i4 i4+ i3 i3+ i7158 J7 7150 7550 and
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3200mAh i7 Lithium ion Replacement Battery for Irobot Roomba i7 7150 i7+ 7550 e5 e5152 e5154 i4 4150 i4+ i3 3150 i3+ 3550 ABL-D1 4624864 - Walmart.com
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6800mAH Battery for iRobot J7 J7+ i6 i7 i8 i6+ i7+ i8+ Robot Vacuum Will it make a HUGE Difference? - YouTube
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