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  1. S

    Kalkhoff new inpulse drive hill climb vid

    Hanged in there just about. Wonder if my hub would get up that...
  2. S

    Alien Aurora - I'm starting an Alien family!

    Ekk 34mph! Speed demon. My disc gets hot enough as it is doing a max of 24mph. Glad to see the Mac Shanghi hub is working at intended!
  3. S

    Building a small A123 Battery Pack

    Thats correct. But my poke at it was that the charger is limited to 50w max output. So regardless of the power supply it simply will not charge any higher than that 50w limit (Although most let up to about 60w). Based on the 50w Life Chemistry the max charge rates for that charger are :-...
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    Building a small A123 Battery Pack

    Yes sorry I applied it to Lipo rather than Life. Either way the charger will not hit the full 6amp limit. If you parallel charge the 12s batteries into 6s2p you could charge them a bit quicker. Turning the amp limit up on the charger to 5ah (If each battery is 2.5ah capacity). It will...
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    Building a small A123 Battery Pack

    Doesn't mean it will do it at 25.2v though... ;-) Check for yourself... Or read the instructions for the charger it says so there. It'll do the 6 amp charge with the following combinations :- 60 Watt Max Charger (As they circuit protected) 2s = 8.4v @ 6amp = 50.4watts 3s = 12.6v @ 6amp...
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    Building a small A123 Battery Pack

    That charger has a 50w max limit. So regardless of the amp selected it will tone it down to 2amps. Heres the logic... 50w / 25.2v = 1.98amps Alot of these chargers usually operate at slightly higher than there rated max. This is for a 6s Lipo brick. If your getting a good 2.3amp...
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    Building a small A123 Battery Pack

    Ps Isn't the Accucell charger only a 50w lipo charger? Which means it won't go past 2amp max really.
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    Building a small A123 Battery Pack

    I use an Xbox 360 Power Supply 203w @ 12v. I used it becasue it was spare at the time and to be honest it was cheap as there simple to modify. It outputs a good 185w that I can use before it shuts its self down with its protection circuit. Not as good as meanwell supplies but again didn't...
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    DIY crank drive ideas please

    You would be better off suited to a geared motor as you've described. The problem with a direct drive at legal power speeds or ratings is that it won't have the effciency or lower torque you require. It would take more amp's to effectivly pull the bike around at the same speed as the geared...
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    Alien Aurora - I'm starting an Alien family!

    Wow sorry to hear that jason. Didn't even get it loosened up before it destroyed itself. Must have been a quality issue as it should not have done that at all. How does the the bpm compare to a mac?!? I can old presume due to the addrionalmcost the quality is better.
  11. S

    Battery question

    Its fine there quite robust the nihm batteries. The only downside really is the additional weight.
  12. S

    Replacement 36V 16AH LiFePO4 batteries?

    I don't understand why you would need a new controller if all your doing is buying another battery? So long as the C rating matches or exceeds the controllers capabilities from an amp point of view it should be all good to go.
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    Volts, Amps and Power

    In simple terms. The larger battery the more watts you have to play with (watts = volts x amps) Using hub motors - More volts = faster rpm. More amps = more torque The controller is the restriction box. This basically stops the motor drawing as much current from the batteries as...
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    What battery?

    The panasonic cylinder cells usually NCGR18650 are generally cheaper 1c Cells with 2c Peaks. Just about covering the needs of the BMS / Motor controller combination. However they are quite robust and safe esp in an alloy case. Also it will be a nice plug and play system. 10ah will be fine...
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    Replacement 36V 16AH LiFePO4 batteries?

    It does seem quite competative for the 15ah battery. Well I hope you get a replacement and you get it all working!
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    BMS Battery conversion kit

    Wow ku120 controller and Alan building the wheels. Should be a good setup I think you'll be more than happy. Just once its all seuo and installed start enjoying it. It will be a fast setup.
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    Talk Torque

    I see. Then you really are scuffered then! Most bikes are only really set to about a 20-25ish mile range. So really you'll need something larger like the 18ah batteries. Maybe you could jsut buy another bike but ensure it has the larger battery and use that one a bit more for the range while...
  18. S

    New tech allows lithium batteries to charge faster, and hold charge longer

    Skeptical and with anything extra its a plus. I'd love to recharge batteries in 15 mins and have another 30 miles range. Even better for cars. Untill then though will wait untill it reaches the retail shelfs...
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    What hub motor?

    I'm really impressed by these so called cheap motors and the miles they can clock up. It also gets me how simple electric motors are compared to the internal combustion engine. Just wish that earlier development happened. I mean you have have a large electric motor in a car and as long as...