Battery size / cells / capacity expressions of interest
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  1. #1
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    Post Battery size / cells / capacity expressions of interest

    Hi all,

    As many of you know, I was going to start selling some Turnigy/Zippy Flightmax LiPo battery packs, sourced from Hobbycity/Hobbyking (same company). I've seen a few other companies do it, but some of the pricing was just silly. Many customers had indicated that they were reluctant to buy from overseas etc which is why I had considered doing it in the first place. Problem is, Hobbycity doesn't sell wholesale

    I've recently had a few issues with some of the packs I've purchased from HC/HK so I have decided to give that a miss and try and get some batteries direct from the factories.

    After a bit of research and testing samples from a few different companies, I've finally found a decent range of batteries. They appear to be rated accurately, ie a 40C battery will hold voltage and exhibit very little if any voltage sag when used within spec. The company actually provided me with test data and such so it looks quite promising. I've ordered a bunch of packs to test with my aircraft which are on the way to me now.

    I will do in-depth testing and we'll probably have the test data available on the website at the conclusion.

    At the moment, I've only ordered a few packs to go with the planes that we sell, but I wanted to see if there was any interest from people for other battery sizes and cell counts.

    Currently we have coming:

    1300mah 3s 20-30C
    1500mah 3s 25C
    1600mah 3s 25C
    2200mah 4s 50C
    It'll be interesting to see if the 2200mah 4s actually holds voltage under a 50C load, as that's 110A from that relatively small battery.

    To give you an idea of price point, the 2200mah 50C pack should be priced just under $60AUD, which is a pretty good price for such a high discharge pack. I only got these in for testing, as they had no 35C cells available for a couple of weeks. We'll get a 35C pack of the same size which will be closer to the $45 mark.
    While I realise that those prices are a little more expensive than other packs available overseas they will be rated to exactly what they are and will come from an Aussie shop with an Aussie warranty etc.

    Basically I don't want to carry a huge range of batteries, just a few sizes that can be used with a range of vehicles and aircraft.

    At the moment I would like input as to what size batteries people are using in vehicles such as:

    HPI Savage Flux
    Traxxas E-Revo
    Traxxas E-Revo 1/16
    Any electric 1/8 buggy/truggy or electric conversion

    In your reply, please copy/paste this bit in so that I can tabulate all the data easily and then make a decision.

    Battery name/brand:
    Cell count:
    Capacity:
    Series/Parallel:
    Discharge constant/burst:
    Dimensions in mm (length x width x height):
    Vehicle:
    Run time:
    Performance:

    Extra stuff if you happen to know it/can be bothered

    Amp draw:
    Average mAh back:
    Power system:
    Gearing:
    Wheels/Tires:


    An example
    Battery name/brand: Zippy Flightmax
    Cell count: 2s
    Capacity: 2200mah
    Series/Parallel: 2s2p
    Discharge constant/burst: 20C
    Dimensions in mm (length x width x height): 100x17x34mm
    Vehicle: Traxxas E-Revo 1/16
    Run time: Stopped counting after 15 minutes
    Performance: Awesome! Far more controllable on dirt than 3s

    Extra stuff if you happen to know it/can be bothered
    Amp draw:
    Average mAh back:
    Power system: Stock setup
    Gearing: Stock
    Wheels/Tires: Stock

    Thanks everyone
    -Sid
    Last edited by cdis; 18-05-2010 at 07:37 AM.

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  3. #2
    R/C God BIG-block's Avatar
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    Great stuff Sid. About time someone tried to make Lipo batts cheap in this country. I am sure we will do bussines.

    Anyway here it goes.

    E-Revo BL

    Battery name/brand: Zippy Flightmax
    Cell count: 2S
    Capacity: 5800mah
    Discharge constant/burst: 30-40C
    Dimensions in mm (length x width x height): 140x50x19mm
    Vehicle: E-Revo BL
    Run time: aprox 45min of light bashing
    Performance: Very good. Batt temp little higher than ambient. Great punch for 4S
    Extra stuff if you happen to know it/can be bothered

    Amp draw: Eagletree DL: 180A peaks but talking miliseconds here. 75-80A avg.
    Average mAh back: aprox. 5200mah/ LVC set for 3.4V per cell
    Power system: Tekin RX8 ESC/Castle 2200kv motor
    Gearing: 18/64 for the amp draw test
    Wheels/Tires
    40 series bowties with Wabash 1/2 off set wheels

    Also

    Battery name/brand: Turnigy
    Cell count: 3S
    Capacity: 500mah
    Discharge constant/burst: 40-50C
    Dimensions in mm (length x width x height): 145 x 50 x 27mm
    Vehicle: E-Revo BL
    Run time: 25min. Few speed runs, backflips.
    Performance: Awesome. Crazy amount of punch and batts stay very cool.

    Extra stuff if you happen to know it/can be bothered

    Amp draw: TBA
    Average mAh back: 4600mah LVC @ 3.4V/cell
    Power system: Tekin RX8 ESC/ Castle 2200kv motor
    Gearing: 18/64
    Wheels/Tires:
    40 series bowties with Wabash 1/2 offset wheels

    And

    Battery name/brand: Turnigy
    Cell count: 3S
    Capacity: 4500mah
    Discharge constant/burst: 30-40C
    Dimensions in mm (length x width x height): 147 x 49 x 29mm

    Vehicle: E-Revo BL
    Run time: aprox 20min
    Performance: Pretty good, lots of punch. Batts a little warm but no hot at all.

    Extra stuff if you happen to know it/can be bothered

    Amp draw: TBA
    Average mAh back: 4000-4100mah LVC @ 3.4V/cell
    Power system: Tekin RX8 ESC/Castle 2200kv motor
    Gearing: 18/64
    Wheels/Tires:
    40 series bowties with Wabash 1/2 offset wheels

    Thats about it for now. I'll try to do some AMP draw testing on the 3S batteries when I get home from holidays so I will update the rest then.
    Also worth a note is the Erevos batt compartment. L 160mm x H 30mm x D 50mm. Also it would be nice to have packs that have the discharge wires come out of the top of the battery and not the side like Turnigy/Zippy have. Would save us having to chop up our battery doors.

    Thanks Sid. I look forwar to see what you come up with. Cheers.
    BASH-BREAK-FIX-REPEAT. ALWAYS REPEAT.

  4. #3
    R/C God snap off racing's Avatar
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    Awesome news Sid, Definatly after a few sets for me and know of others that will be interested.

    Battery name/brand: Venom
    Cell count: 2S
    Capacity: 5000mah
    Discharge constant/burst: 40c constant, unknown burst
    Dimensions in mm (length x width x height): 138 x 47 x 27
    Vehicle: ERevo Brushless 1/10
    Run time: 15 min + racing
    Performance: A little warm after running to LVC, good punch though

    Amp draw: ?
    Average mAh back: 4500mah at 3.3v LVC
    Power system: MMM 2200kv combo
    Gearing: 19/58, wanna try 19/54
    Wheels/Tires:
    LPR off road tyres

    I have tried IP 5000mah 30c packs and they got hot and puffy, My erevo doesnt seem to like full throttle down PHDRs with less than 40c 5000mah as it jurks on and off throttle.

    Would like to get a set of 5800mah+ in a 30c+ 2S pack

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  6. #4
    R/C God Carnivean's Avatar
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    Excellent Sid.

    I reckon for the MT crowd if you get a good size battery (5000mAh or higher, 40C or higher) then you should be able to get a 2s, 3s and 5s battery and cover pretty much the entire market of E-Monster Trucks

    Also what chances of hard cases? might be worth it for the extra cash depending on what they quote.

    I'll be happy with anything like the guys mentioned above for the MT, but I will add in something different for the Crawlers

    Battery name/brand: WinForce
    Cell count: 3s
    Capacity: 1500mAh
    Series/Parallel: 3s1p
    Discharge constant/burst: 25C/30C
    Dimensions in mm (length x width x height): 68mm x 36mm x 24mm
    Vehicle: Axial AX10
    Run time: 30min + (never had one cut out )
    Performance: Good, run time was there, it pushed the car up some decent inclines and didn't drop even with the CC BEC set to 6v and 5A for the servos. Car is stock plus about another 200g added to wheels so would have been on the heavy side. Battery should improve with car changes (remove weight)

    Power system: Tekin FX-R and Tekin 55T motor
    Wheels/Tires: Axial Rock Lizards and 2.2 beadlocks

    Battery name/brand: Losi
    Cell count: 3s
    Capacity: 1350mAh
    Series/Parallel: 3s1p
    Discharge constant/burst: 20C/30C
    Dimensions in mm (length x width x height): 70mm x 43mm x 21mm
    Vehicle: Axial AX10
    Run time: only tried it the once to make sure it worked, more than the 2 minutes that I ran it for
    Performance: see above. I expect it to be similar to the WinForce above though with slightly less run-time and possibly a little less punch. Should not really be anything visible at these capacities and usage.

    Power system: Tekin FX-R and Tekin 55T motor
    Wheels/Tires: Axial Rock Lizards and 2.2 beadlocks

    Personally the WinForce is a better size than the Losi for front axle mounted battery holder I have installed. The Losi battery does restrict steering a little and without a dig unit that would be a pain.
    Both batteries fit the Losi Comp Crawler fine.

    So what would I like to see?
    25-30C 1200mAh-1500mAh 3s - ideally 65mm x 35mm footprint
    Buggy - 5B SS (30.5 Zenoah ESP ported), DF-02 (LRP 10.5T combo)
    Monster Truck - E-Maxx (Dual KD 700HO), E-Maxx (WIP, MMM 2200kv, FLM Chassis)
    Crawler - AX-10 (Tekin FXR + 55T), Losi Comp Crawler (HW Justock + 21.5T Xelorin)
    Drifter - Sakura D3 (HK XCar 4000kv), Sakura D3 (HK XCar 4000kv)

  7. #5
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    Battery name/brand: IP??
    Cell count: 2
    Capacity: 5300mAh
    Series/Parallel:
    Series
    Discharge constant/burst: 35C constant
    Dimensions in mm (length x width x height):
    Vehicle: HPI Blitz
    Run time: Long enough
    Performance: Great. Batteries stay cool even though the ESC and motor can get seriously hot. The batts have never gone over lukewarm

    Amp draw:
    Average mAh back: roughly 4000mAh from memory
    Power system: Mamba Max ESC and 7700kv Castle Creations Brushless Motor
    Gearing: 16/88
    Wheels/Tires:
    Stock
    Last edited by main_event; 18-05-2010 at 09:50 AM.
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  8. #6
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    Oh, I forgot to mention these cells should be capable of at least 3C charging, if not 5C

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  9. #7
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    Battery name/brand: Turnigy
    Cell count: 3s
    Capacity: 5000mah
    Series/Parallel: 3s1p
    Discharge constant/burst: 20C
    Dimensions in mm (length x width x height): 145 x 49 x 26mm
    Vehicle: HPI Firestorm (running traxxas VXL/Velinion motor)
    Run time: 20-40 minutes
    Performance: Absolute Missile

    ----------------------------------------

    Battery name/brand: Turnigy
    Cell count: 4s
    Capacity: 5000mah (2 of these batts run in parallel for a 10,000mah capacity)
    Series/Parallel: 4s1p
    Discharge constant/burst: 20C
    Dimensions in mm (length x width x height): 148 x 49 x 33mm
    Vehicle: Savage Flux
    Run time: 1 hour +, ive never flattened it
    Performance: Standing backflip capable

    ----------------------------------------

    Battery name/brand: Turnigy
    Cell count: 2s
    Capacity: 5000mah
    Series/Parallel: 2s1p
    Discharge constant/burst: 30C
    Dimensions in mm (length x width x height): 143 x 49 x 16mm
    Vehicle: Hpi Blitz with Flux system.
    Run time: 30-40 mins practicing on a track
    Performance: More discharge than the car needs.
    SCX10 Honcho - cc sidewinder, hpi 35t, 3s
    Blitz - velineon 3500, 100amp esc, 3s
    Firestorm Flux - velineon 3500, 100amp esc, 3s
    Savage Flux - 150a esc, 4s 10,000mah, 40s mashers

  10. #8
    Senior Moderator little_drifter's Avatar
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    Whats with the unmeaningful posts?? this is an old thread!




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  11. #9
    R/C Guru chicken_fart's Avatar
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    Quote Originally Posted by little_drifter View Post
    Whats with the unmeaningful posts?? this is an old thread!
    Michael999 is probably thinking "finally, some recognition, only took 2 years"
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  12. #10
    R/C God RatsacK's Avatar
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    Quote Originally Posted by chicken_fart View Post
    Michael999 is probably thinking "finally, some recognition, only took 2 years"
    I don't think he really cares anymore. Pretty sure he sold all his RC's ages ago. Last I knew I think he was doing rock climbing or something.
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  13. #11
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    I think you right Ratsack...I think he is in the pursuit of happiness elsewhere these days




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