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Lithium Ion Battery Pack - 3.7V 6600mAh : ID 353 : $24.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Lithium Ion Cylindrical Battery - 3.7v 2200mAh : ID 1781 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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EBL 4-Pack 14500 3.7V 2800mAH Lithium Li-ion Rechargeable Battery Batteries with Storage Box - Walmart.com
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