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Battery - SparkFun Electronics

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Tenergy Li-ion 18650 Cylindrical 3.7V 2600mAh Flat Top Rechargeable Battery-UL Listed (MH48285) Tabs Option No Tabs

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DLG 18650 2600mAh 7.8A Battery - NCM18650-260 - 18650 Battery Store

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AT: Tenergy Li-Ion 18.0V 2600mAh Rechargeable Battery Pack w/ PCB (5S1P, 48.10Wh, 2.6A Rate) - Tenergy Power

7.4V 2600mAh 2 Cell Lithium ion 18650 19.24Wh Rechange Battery Pack with 2 Pin MTA-100 Connectors (Battery and Charger Kit) : Electronics