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Lithium Ion Battery Pack - 3.7V 4400mAh : ID 354 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Kobalt 5 Ah Lithium Ion (li-ion) Battery in the Cordless Power Equipment Batteries & Chargers department at Lowes.com
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Amazon.com: EBL 8 Pack Rechargeable Lithium AA Batteries, 1.5V AA Li-ion Batteries with 8 Slots Smart Lithium Rechargeable Battery Charger : Health & Household
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Amazon.com: AA Batteries - USB Rechargeable Double A Lithium Batteries - Li-ion Battery Cell - 1.5V / 1700mAH (4-Pack) - Not NI-MH/NI-CD/Alkaline Batteries - ECO-Friendly and Recyclable - No Memory Effect(Green) :
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