Replies

  • Jose Eduardo March 1, 2016 at 6:56am

    Hobbyking Graphene Lipo Review and Teardown

    A video Disassembling batteries 

    https://youtu.be/fBy4eoDVp_g

  • Richard Kennedy February 12, 2016 at 4:16pm

    Good battery info here

    http://www.rcjuice.com/lipo-battery-basics/

    I used to buy my batteries from this guy at rcjuice they were called Basher series batteries. The 3S 5200 Mah flight time was 10 minutes. Then he changed his batteries what he's selling now and even though it tested at over 5200 Mah the flight time dropped to 7!! I don't get it. Too bad the older batteries were on sale sometimes for $30! 

    • Cala > Richard Kennedy February 12, 2016 at 4:47pm

      Graham: grap looks no much difference with others in price and weight, If it is thrue that don't lost v at the end, looks interesting for racers? or looks too heavy?

      Good info Richard, Thank's 

  • Moderator
    Graham Dyer February 12, 2016 at 11:03am

    2200mAh 3S batteries from Hobbyking International Warehouse:

    Turnigy Graphene      - $22.53 - 225g - 65C - http://www.hobbyking.com/hobbyking/store/__91184__Turnigy_Graphene_...

    Turnigy Nano-Tech       $19.99 - 201g - 45-90C - http://www.hobbyking.com/hobbyking/store/__11951__Turnigy_nano_tech...

    Turnigy Bolt HV          - $25.39 - 203g - 65-130C - http://www.hobbyking.com/hobbyking/store/__89421__Turnigy_Bolt_2200...

    Their claim to fame seems to be the very high cycle life, low IR (even after 100's of cycles) and less voltage drop under load

  • Cala February 11, 2016 at 8:02am

    Thank's Gabor, good to know

    Tony -10c???? BRRRR!!!!! and what's about you? ....FROZEN!!! :o

    • Cala February 12, 2016 at 7:15am

      GLUPP!!! You need an indoor copter, I couldn't imagine that temp :O . Now I'm going to remember you in winter when I don't want to fly because are 5 or 10ºC outside and go anyway ;)

  • Bernardo Diaz February 10, 2016 at 6:58pm

    I agree that C rating is really overated, I use Multistar 6S 10000Mah x 2  in my big copter and so far they are working great. however I have at least 25min flying time so I try not to use it beyond 2C to 3C. I also balance them everytime I go out flying.

    My opinion is that is much better to invest in a good charger rather than an expensive battery

  • DG February 10, 2016 at 9:32am

    I find the voltage drop on Multistar batteries is excessive when approaching 3c. IMO they are ok for very light copters, but after a short time begin degrading.

    When first installing on the Sky Hero 750 Y6, I was impressed with the MS, but soon it became apparent the 'C' rating is very much overrated as demonstrated when flying into a head wind it went into battery failsafe prematurely. Therefore I only use on lighter quads. That said, late last year HK had the MS 5200 4s batteries for $15.....wish I bought 4 instead of 2 for my test quad.

    Personally I came to like Lumenier batteries. Power to weight is better than MS and also higher 'C' rating, but of course are much more expensive.

    • Developer
      John Arne Birkeland > DG February 13, 2016 at 9:18am

      What voltage did you set the failsafe trigger at? For some reason in the multicopter community there is this belief that fail-safe should be set at 3.7v/cell, which is ludicrous.

      3.7v is the nominal voltage for a lipo cell under load. If you failsafe at that voltage you will never be able to get 80% out of the battery with normal 5-10C current usage. A more sensible failsafe trigger would be around 3.4v/cell, and still be conservative with regard to safety.

    • Cala > John Arne Birkeland February 13, 2016 at 9:24am

      Me, 3.4-3.5v to get 70%-80%

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