CNHL (China Hobby Line) Long Range Series 12700mAh 14.4V 4S 21700 Li-ion
Series: CNHL (China Hobby Line) Batteries for drones
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The CNHL Long Range 12700mAh 4S2P is a lithium-ion pack from CNHL (China Hobby Line) for mid-size multicopters aimed at endurance. Eight BAK 65E cylindrical cells in the 21700 format form four series stages with two cells in parallel each; every cell carries 6,350 mAh.
A nominal 14.4 V and 12.7 Ah give about 183 Wh (182.88 Wh); at 626 g that is about 292 Wh/kg at pack level. At 14.4 V the same power draws 50 per cent more current than from a 6S Li-ion pack at 21.6 V, so ESC, leads and connectors have to be sized for it. The continuous current of the pack is the cell value times two. The connector is an XT60; a version with an XT90 exists as well.
At 182.88 Wh the pack is above 160 Wh. Under the IATA passenger leaflet (February 2019 edition) it therefore travels only as dangerous-goods cargo and not as a spare in hand baggage. Every shipment requires UN 38.3 testing, and airline rules may be stricter. The 626 g pack weight counts towards take-off mass.
In selection the 4S cell count must suit motors and ESCs; 4S drives are built for lower voltage and higher current. Wear in cylindrical cells shows as falling capacity and heat under load, not as swelling. At the five-pin balance lead one checks the voltages of the four series stages; if one runs away, the pack needs inspection. Cold lowers the current capability, and storage is in the middle of the charge range as the maker specifies.
Technical data
Other data
| Capacity (mAh) | 12,700correct |
|---|---|
| Cell chemistry | Li-Ioncorrect |
| Cell count (S) | 4Scorrect |
| Connector | XT60correct |
| Energy (Wh) | 182.88correct |
| Energy density (Wh/kg) | 292correct |
| Form factor | Packcorrect |
| Nominal voltage (V) | 14.4correct |
| Weight (g) | 626correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
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