Introduction: 14V 7000mAh Li-ion Battery for DJI Phantom FC40

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About: We design and create batteries, electric vehicles and DIY electronics. We research, develop and document our creations to inspire others. Our mission is to bring resources to people all over the world and en…

Building video of a compact 14V 7000mAh 8 cells Li-ion high density battery and "Y" type wiring designed to work as a secondary / paralleled battery for a DJI Phantom FC40 drone.

In this case the battery works without electronics (as a Lipo Pack) so the discharge goes raw through the main leads (XT60) and charge is always done as a "balancing charge" with any balancing charge hobby charger like "IMAX B6"

Although the increment in energy were a 133% higher than its original 3000mAh Lipo Battery, the practical range is not a 133% higher, because the differences in weight in a drone makes a dramatic difference. In this case the range (flight time) were doubled.

Specifications:

- 4 serial, 2 paralleled 3.5Ah 3C Sanyo NCR18650 GA 18650 Lithium-ion cells.

- spot welded with twin layers of 0.12mm x 7mm of pure nickel.

- 4s balancing wires (JST-XH)- 16 AWG wires.

- XT60 discharge port

- total weight: 390gr

Performance:

- 20A continuous capability (300W)

- 40A burst capability (600W)