Anyone have experience with 6s li-ion packs? I was looking at a 6000 mAh one. I’m guessing it’ll increase my flight time but also know it’ll be much heavier so could offset the range by a lot. 

For reference: this is for a 7 inch i recently built for mid/long range. I’ve mainly flown with 6s 3300 mAh lipo. Without pushing too hard I can get about 10 min of flight time which gets me down to 3.6 or so. 

Other ideas welcome! Thanks all

If you search for "FalconRad FPV" on youtube you can see some of his long range flights on a 7" quad he has built and he uses LION packs that he makes himself. He tends to use them in a 6S2P configuration to get longer flight times and he offers some suggestions on the brand/type of cells he has experimented and prefers.

This one video should give you a really good idea and other videos on his channel will prove his flight tests:

Li-Ion Packs are absolutely a must-have for any sort of Long Range. Regarding weight, Li-Ion batteries are much more energy-dense than LiPos, meaning they have higher capacity per gram, here is an example:

- Your current 6s 3300mAh LiPo probably weighs about 500g
- A 6s2p 6000mAh Lion will weigh around 600g
- So this would add about 100g but would almost double your capacity, and on a 7" quad this extra weight won't be an issue.

FalconRad does really neat stuff and his video provides a lot of great details.  I recently posted the below Li-Ion battery DIY video showing the same basic process however I presented it as "10 Easy Steps" in 3 mins.  So it's a much quicker overview of the process which is useful for anyone curious to see what the DIY entails.

Disclaimer: The process is not hard and does not require any special tools or knowledge, however, you should be confident working with solder and electronics as mistakes could result in damaged batteries, fire, and injury.  

- Model: GNB 6000mAh 6S 100C LiHV Battery
- Weight: ~659g (+/-5%)
- Dimensions: ~54x44x140mm (without wires and connectors)
- Connector Type: TRX and JST-XH balance connector
- Cells: 6S 1P / 22.2V (LiHV)
- Rating: 100C Continuous - 200C Burst


so 50g diference
but ALOT more current...?

4500mah is 500g.

you are all totally insane strapping a 600gr or more behemoth onto a 7 :-) :-) :-)

...

I need to try that :-D Usually I fly 2200 6s

i have this 500g 4500mah ald fly great but with 2810 motors not some small ones ;P get +-8-10min of hard fly and +-12-15 of normal
thinking about thus 6000mah but i with this flight times i feel like i does not need more for now ;P

(09-Jul-2021, 09:24 AM)d00lar Wrote: - Model: GNB 6000mAh 6S 100C LiHV Battery
- Weight: ~659g (+/-5%)
- Dimensions: ~54x44x140mm (without wires and connectors)
- Connector Type: TRX and JST-XH balance connector
- Cells: 6S 1P / 22.2V (LiHV)
- Rating: 100C Continuous - 200C Burst


so 50g diference
but ALOT more current...?

4500mah is 500g.

I looked at that LiHV from GNB recently and things did not add up in terms of specs. I am not sure how they managed to bring the weight down.

Compared with a Tattu R-Line 22.2V 5100mah 6S 95C ( https://www.genstattu.com/ta-rl-95c-5100-6s1p.html ) which weighs 868g.

The Tattu lipo has 10 awg wire with a AS150 connector versus the GNB which has 12 awg wire and XT90. The Tattu clearly can deliver more current due to its wire/plug configuration.

Where did the weight go? I know we are talking LiHV vs Lipo here but thats a 200g difference in weight with 1000 MAH more in the bank. 

And the GNB is almost $15 cheaper than the Tattu.

We will be pushing that GNB battery very hard being LiHV as well and I hope it can give enough charge cycles.

my 4500mah is now after about +-50 cycles
i see that on big punchs voltage drops now bit faster then when was new
but i think another 50 is possible with no issues   moabe more.. wil let you known if i hit 100 if you want
i do not known how they did it but as they 'promote' it is new lighter battery line of 2021 year

evefy few years lipo gets larger mah in tearms the same weight
so maybe they invented something new - no idea but this battery is great
this is high voltage - maybe thanks to this somehow

my 4x2810 eats over 155a
https://intofpv.com/t-project-399-super-...#pid145272

Call me sceptical, but I would like to see some proper tests conducted on these supposed new high capacity GNB batteries that weigh less than some of the best LiPos out there which have a lower capacity and a higher weight. JB has a proper $4000 USD battery test machine, so maybe GNB would like to send him one of their new "6000mAh" batteries to test

i never tested it on discharge
but usualy when i discharge it to 3.5-3.7v
then my hota charger count 3700-4100 mah charged
so it may be a bit less then 4500 in reality but im not shure i never discharge lower

but yes good test would be nice ;D

Below is a link to the up-to-date results from JB's $4000 battery test machine. Not a single GNB battery has been provided to JB to test even though it is supposedly one of the most widely use brands. It makes you wonder if GNB are trying to hide something  So it would certainly be beneficial to see a few of their LiPos submitted for independent testing.

https://docs.google.com/spreadsheets/d/1...R3UlZa7gA4

I know that we've gone off topic a bit from the OP's original question but I believe that was already answered by GiantAntCowboy further back in the thread.

I made myself some 6s P42A li-ions, which weigh around 490g, and they are truly awesome, 25-30 minutes of flight time with my 7 inch. total weight is 890g.

so for me if gnb does not lie then LION now are not worht diging into
if they lie then it might

i think that they dont cause on 1500mah 6s other barrand i was able to fly about 3-4min max
and in this 4500 mah i can 10-15min
than +- it is ok but can be a bit inflated
i can do some discharge test on my D6 Duo not shure how much it is accurate but should +- be ?

I have always stayed away from LiHV because I have not seen any solid recommendations on using them over traditional packs based on long term experience.

People have reported interesting results where if they took a regular lipo and a hv version from the same manufacturer (of similar physical dimensions) and charged both as regular lipo cells (4.2v) then they performed almost the same in terms of flight times (although such flight tests can have slight variations in flying styles or flight course).

Most of these tests seem to indicate them to be very similar cells although everyone mentions not to charge a regular Lipo cell to high voltage (4.35volts).

Others have reported very short life span of LiHV cells, the cells puff up and some report they land fairly hotter compared to regular lipos.

Long before LiHV cells were common, racers used this trick for years where they would over charge lipos before a race but then they burn through batteries fairly quickly.

For Lion cells I was fairly excited but they can’t provide the required amp draw for aggressive freestyle but they are great for cruising and LR applications. Even 2P Lion combinations suffer from sag during aggressive flights.

I known and I thought the same but weight/mAh ratio was most important to me and I didn't found ANYTHING that with this weight and more 4000mah thats why I bought and I'm really impressed by them seriously. 
I'm doing test right now we will see  


I'm doing it on brand new that I have
Latter I may do second one after 50-60 cycles