6S 4000mah 40A | 21.6V Li-Ion Battery Pack

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6S 4000 mAh 40A Lion Battery Pack

Roaring power in a delicious compact package for long range FPV quad like our mighty Bind N Fly drones

or our brand new

equipped with DJI digital FPV or analog FPV system. Special for your epic cinematic aerial video and relaxing cruising!

Made with love and high quality Samsung 4000mah 40A 21700 Li-Ion cells


This LiIon battery pack is meant for cruising and long range flight with 5", 6" and 7" inches drones.

Keep in mind that it performs better with low RPM and good torque motors equipped with the right propeller. 

For more information, check your motor's performance chart and find out which prop gives the best efficiency value referred to a 6S battery: that's the right propeller for this battery.

Plan your flight in order to still have 3.0 V/cell when landed: this will keep your Li-Ion battery pack healthy for a long long time.

Select specific Li-Ion program on your balancing charger and charge at no more than 2.0 A.

With multi-rotors, stay at 50/55% of your throttle and be smooth when open up and maneuver.

You could consider to set your throttle curve and roll/pitch rates in order to have smoother accelerations. This way you will enjoy this battery pack almost a life-time.

An order containing this product may need 2 up to 5 business days to be fulfilled.


  • Standard connector: XT60
  • Nominal voltage/cell: 3.6v
  • Nominal 6S voltage: 21.6v
  • Nominal capacity: 4000mah
  • Weight: 439.6g
  • Dimensions mm (W x L x H): 65 x 80 x 43

9 Reviews Hide Reviews Show Reviews

  • 5
    6S 4000MAH 40A | 21.6V LI-ION BATTERY PACK

    Posted by Vittorio on 6th Jun 2021

    Eccezionale batteria x durata, peso, ingombro. Ultra consigliata x long range su droni 5 e 7 pollici.

  • 5
    6S 4000MAH 40A | 21.6V LI-ION BATTERY PACK

    Posted by Maurice on 1st May 2021

    Great Battery build. Quick sensible shipping Customs costs zero due to shipping method Well Pleased will buy again !

  • 5
    Very nice packs!

    Posted by Marsellus on 24th Apr 2021

    I am using these packs for my Iflight Chimera 7" Long range quad. I get around 12 mins of flight time with a GoPro. The performance of these packs is really good! Because they deliver 40A continous and tolerate high bursts, you can fly with these things like with a lipo. As a plus they are much more safer than lipos. They packs itself seem to be made very well. But I didn´t take a look under the hood to see the spot solder job. I think the outer coating is a bit thin, this could be improved. Apart from that, the selection of the cells is also good, they are well balanced. Keep it up man!

  • 5
    6S 4000MAH 40A | 21.6V LI-ION

    Posted by Michele Stanisci on 2nd Mar 2021

    Che dire, 30 minuti di volo con un 5 pollici è il top... venditore cordialissimo e onesto.

  • 5

    Posted by Luca Pelizzaro on 25th Aug 2020

    Devo ancora testarle approfonditamente, ma già dai primi voli si stanno comportando egregiamente!! Le sto utilizzando su un drone fpv 7" da long range (non leggerissimo) e per ora 16 minuti li faccio tranquillamente

  • 5
    Review 6s 4000 Li-ion battery

    Posted by Antonio on 11th Aug 2020

    Amazing battery and honest seller. Not more to tell.......very good

  • 5
    6S LiIon 21700 4000mah

    Posted by Mark Pallaschke a.k.a. RDoc_FPV on 1st Aug 2020

    Great power source for my 7“ long range quad. Very good build quality and almost 20min flight time: highly recommended!

  • 3

    Posted by GABRIELE GRECO on 14th Jun 2020

    Un po lenta la spedizione, per il resto la batteria è conforme alla descrizione! Buona qualità

  • 5
    Review 6s 4000 Li-ion battery

    Posted by Antonio on 11th Dec 2019

    Amazing product. I will buy again from farinsframes.