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Apr 10, 2016, 11:32 AM
Hamburger
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Help!

updated 2020 want lightweight true ~5C/10C lipo for 4S, around 400gramm application


Hi,
I have been searching for some time to replace an outdated lipo.
Current lipo is a rewrap of receiver packs
- 4S,
- 5000mAh,
- 400gramms,
- sane low voltage under load 3,0V per cell

My application has typical load of 3C=15A, max load is 7C=35A.

Witht the new lipo I want to be able to use 80% of nominal capacity with this load without hitting low voltage limit.

Candidates so far for 4S, around 400gramms:
- multistar 5200mAh, 430g - 10C/20C labeled
- multistar HV 5200mAh 420g - 10C/20C labeled
- hyperion g6 HV 4400mAh 410g - 30C/60C labeled
- revolectrix 435 HV 4600mAh 410g - 30C/60C labeled - (possibly 3,4V/cell LVC?)
- LiPolice GreenLine Light 4500mAh 410g - 25C/50C labeled.

Opinions on candidates or any recommendations, preferrably based on facts welcome.
Thank you

udpate 2017: with HV and socalled graphene lipos the mainstream demands have been heard - but question remains for 'endurance' lightweight true 5C/10C lipos.

update 2020: post #14 and following wrt. LiIon for reference
Last edited by hamburger; Jan 28, 2020 at 12:51 PM.
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Apr 11, 2016, 05:33 AM
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TechTronic9000's Avatar
Quote:
Originally Posted by hamburger
- multistar 5200mAh, 430g - 10C/20C labeled
I use one of these as a field power supply and for bench testing various builds. A friend of mine uses two of these on a bait/fishing R/C boat, can't complain about it, especially that sometimes it runs with a promo price of just 15 euro.
Apr 11, 2016, 06:46 AM
Hamburger
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Quote:
Originally Posted by TechTronic9000
I use one of these as a field power supply and for bench testing various builds. A friend of mine uses two of these on a bait/fishing R/C boat, can't complain about it, especially that sometimes it runs with a promo price of just 15 euro.
In the past I have had mixed luck with HK lipos; cheap lipo dying inflight makes for expensive repair .
Do you have any IR values for the multistar?
Apr 11, 2016, 06:51 AM
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Quote:
Originally Posted by hamburger
In the past I have had mixed luck with HK lipos; cheap lipo dying inflight makes for expensive repair .
Do you have any IR values for the multistar?
I don't have an IR value yet, but if my order from HK ships soon then I'll have a tool to measure it.
Apr 13, 2016, 04:58 PM
Hamburger
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some IR values found in HK Multistar thread https://www.rcgroups.com/forums/show...&postcount=866
Apr 16, 2016, 02:35 PM
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IR measurements from one of mine multistar 5200 mAh 10c / 3S. Name: uploadfromtaptalk1460835139095.jpg
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Description: Name: uploadfromtaptalk1460835150509.jpg
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Apr 19, 2016, 02:49 AM
Hamburger
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That would equate to true 12C continuos.
Not bad
Apr 19, 2016, 06:26 AM
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TechTronic9000's Avatar
Quote:
Originally Posted by hamburger
That would equate to true 12C continuos.
Not bad
For my needs it does the job, I'll see if my friend will lend me his "boat" lipo's to test them also as he has bigger load on them.
Mar 25, 2017, 07:49 AM
Hamburger
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update 2017


udpate 2017: with HV and socalled graphene lipos the mainstream demands for high load applications have been heard - but question remains for 'endurance' lightweight true 5C/10C lipos in 3S and 4S in the 5000mAh range.

No new choices but the same candidates from early 2016, namely
for 4S, around 400gramms:
- multistar 5200mAh, 430g - 10C/20C labeled
- multistar HV 5200mAh 420g - 10C/20C labeled
- hyperion g6 HV 4400mAh 410g - 30C/60C labeled
- revolectrix 435 HV 4600mAh 410g - 30C/60C labeled - (possibly 3,4V/cell LVC?)
- LiPolice GreenLine Light 4500mAh 410g - 25C/50C labeled.
plus
- SLS x-cube 3S 5000 20/40C 350g
- SLS x-cube 4S 5000 20//40C 470g

anything I forgot, please?
Mar 27, 2017, 02:40 AM
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TechTronic9000's Avatar
I can now report that I've re purposed the multistar 5200mAh as a large quad flight battery (quad motor, 1.5Kg), it's been through a number of flights and still performs good, haven't done IR measurements but I verify the charged capacity after each use and it hasn't went down, nor the flight time was decreased.
Jul 11, 2017, 11:21 AM
Hamburger
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another option
- SLS APL 7000mAh, 610g - 25C/40C labeled
Last edited by hamburger; Jul 11, 2017 at 11:57 AM.
Jul 11, 2017, 07:52 PM
Registered User
Hi hamburger. A local fellow is suppose to provide the funds to build a 4s 6000ma lilon battery pack that should be under 400g. If it happens I will let you know how it performs.
Jul 12, 2017, 03:29 AM
Hamburger
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Cool.
I am curious to learn of LiIon which is capable to provide zrue 5C continuous.
Jan 28, 2020, 01:20 PM
Hamburger
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01/2020: LiIon for reference


for multirotor use with efficiency (lowest mass per energy) in mind there is LiIon as obvious choice if load is close to or below 1C, meaning flight time 1 hour or more. On the other side we see FPV with ultra high current demands.Between these two extremes ther is not much choice when looking for a quality low C lightweight LiIon/LiPo/LiHV battery.

For comparison here is real world data on what is possible for a 4S setup, battery weight 305g, continuous current 10A with occasional spikes of 25A :

4* 21700 golisi s35 cells = 305g: continuous load of 10A, Voltage from 3.8V to cutoff at 3.1V, 3100mAh used (in about 18 minutes)

or
SLS quantum 30C 3000 = 320g - usable 80% == 2400mAh

former options were
HK multistar HV - phasing out
Revo and hyperion - mixed results as seen in the high load test thread https://www.rcgroups.com/forums/show...st-Comparisons

Seems no quality offers in 2020 for lightweight batteries addressing real world 5C/10C loads?
Jan 28, 2020, 01:48 PM
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Woga65's Avatar
4s2p Murata/Sony US18650VTC6 would be 6000 mAh @ 400 g.


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