Save weight?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • keithbradley
    Fast Electric Addict!
    • Jul 2010
    • 3663

    #16
    Originally posted by Doug Smock
    How many cycles do you have on those now? LOL
    I agree with where you're going here Doug, with one caveat: By the time you have put 200 cycles on a lipo and found it to be the cat's meow of the lipo world, you're often not going to be getting the same thing when you buy that brand again. This makes it pretty near impossible to "prove" that the latest and greatest is indeed the greatest. All we can go by is the info we have.

    I don't think best performing and longest life span are synonymous either.

    What do YOU think is the best lipo you can buy today?
    www.keithbradleyboats.com

    Comment

    • tlandauer
      Fast Electric Addict!
      • Apr 2011
      • 5666

      #17
      @ NativePaul,
      Well, I am reading your reply with a big smile... I am certainly glad that you decided to be "that guy"...
      I AGREE WITH YOU 110% AS WELL, it was very poor choice of wording on my part! I own just about the entire line of stock that MinicatRacingUSA carries and the batteries i use are between 1900-2300mah, C ratings are no higher than 25---that , by the way, was an advisory posted on their site a few years ago, i don't know if it still is. They warned that too high ( 30C and above for example) would actually damage their ESC, of course, there was a big debate, but Jim Slaughter stood by his advisory, if he reads this, he may be able to chime in...
      So yes, I have used these batteries to my greatest satisfaction. They are FlightPower batteries sold on TowerHobbies, they are 4 years old and still going strong.
      Back to the topic, I was , as it is evident, only thinking the boat under discussion.
      There have been a lot of debate as to what is a good starting point for C rating. My suggestion of 40C was based on something I would buy with a decent amount of budget to invest in batteries so the OP can use them perhaps in a more powerful boat than the Revolt down the road. Aren't we all going for faster and more powerful all the time? Simple as that.
      I have said this before and will say again, this is a great forum, this kind of correction should be encouraged and anticipated, without these "That guy" mentality, misinformation goes a long way to confuse new comers.
      Chalk it up one for internet real time communications!
      And last but not least, thank you, NativePaul! I have always read your post with respect and gratitude.
      Too many boats, not enough time...

      Comment

      • rickwess
        Senior Member
        • Apr 2013
        • 777

        #18
        I ran a ThunderPower 4400mah 45C 4s in my Revolt with the 1800kv motor and as big as a m545 prop. Speed was just over 50mph. The batteries came back fairly warm after 5mins runs. I personally wouldn't go any lower than 45C with that type of set-up.

        Comment

        • Doug Smock
          Moderator
          • Apr 2007
          • 5272

          #19
          Originally posted by keithbradley
          I agree with where you're going here Doug, with one caveat: By the time you have put 200 cycles on a lipo and found it to be the cat's meow of the lipo world, you're often not going to be getting the same thing when you buy that brand again. This makes it pretty near impossible to "prove" that the latest and greatest is indeed the greatest. All we can go by is the info we have.

          I don't think best performing and longest life span are synonymous either.

          What do YOU think is the best lipo you can buy today?
          I agree Keith and that's where I was going. I suspect Revo will be the same.
          I don't have any idea what the best LiPo available today.
          I wasted a ton of money buying into the "noise" on some batteries this year. "Noise" from some individuals I trusted. I'm just going to eat that, won't consider selling those for any price. Integrity means something to me.

          Bought into the latest and greatest here recently also, only much less money involved. Can't get a email reply but man the newsletters keep arriving. Still waiting for a little service after the sale.

          The bottom line seems to be this is turning into a "battery of the month game". And all the "noise" on the internet about batteries is just that, "noise".
          I hope one of the manufactures gets it all together, and keeps it that way. I'm not going to play the 'battery of the month game".


          D.
          MODEL BOAT RACER
          IMPBA President
          District 13 Director 2011- present
          IMPBA National Records Director 2009-2019
          IMPBA 19887L CD
          NAMBA 1169

          Comment

          • keithbradley
            Fast Electric Addict!
            • Jul 2010
            • 3663

            #20
            Originally posted by Doug Smock
            I agree Keith and that's where I was going. I suspect Revo will be the same.
            I don't have any idea what the best LiPo available today.
            I wasted a ton of money buying into the "noise" on some batteries this year. "Noise" from some individuals I trusted. I'm just going to eat that, won't consider selling those for any price. Integrity means something to me.

            Bought into the latest and greatest here recently also, only much less money involved. Can't get a email reply but man the newsletters keep arriving. Still waiting for a little service after the sale.

            The bottom line seems to be this is turning into a "battery of the month game". And all the "noise" on the internet about batteries is just that, "noise".
            I hope one of the manufactures gets it all together, and keeps it that way. I'm not going to play the 'battery of the month game".


            D.
            The one good thing is that regardless of all the false claims, gimmicks, and BS ratings (Those who really think their lipos are 65C continuous... I have some unfortunate news for you), lipos in general have gotten better and better. There are some poor QC practices in some of these places, but the ability to provide a level of performance per buck has constantly gone up.
            www.keithbradleyboats.com

            Comment

            • NativePaul
              Greased Weasel
              • Feb 2008
              • 2761

              #21
              Originally posted by Rickwess
              I ran a ThunderPower 4400mah 45C 4s in my Revolt with the 1800kv motor and as big as a m545 prop. Speed was just over 50mph. The batteries came back fairly warm after 5mins runs. I personally wouldn't go any lower than 45C with that type of set-up.
              Rickwess, if you are getting 5 minute runs you cant be pulling more than 12C average from your cells, with 4400mAh that is no more than 50A average current even if you are emptying them, all LiPos heat up far more towards the end of their discharge than they do at the start even if the load is the same. Unless you really need the runtime, not using the last 20% of your pack is recommended so your cells will run cooler and last you longer. Have you noticed how much your charger is putting back into the battery when you charge it? I think that if you set your timer to 4 minutes instead of 5, your cells would run cooler, last you longer and you would not think they have a marginal C rate.

              Originally posted by keithbradley
              The one good thing is that regardless of all the false claims, gimmicks, and BS ratings (Those who really think their lipos are 65C continuous... I have some unfortunate news for you), lipos in general have gotten better and better. There are some poor QC practices in some of these places, but the ability to provide a level of performance per buck has constantly gone up.
              For sure Keith, the first LiPos I boated with were 1200mAh 3s, cost about £35, had to be imported from Japan and put out 2.9v/cell under load, the last ones I bought were 1500mAh 3s, cost £11, were purchased from my own country and put out 3.7v/cell under load. Much cheaper, much more convenient, and much better performance, win win win. Safer if you mistreat them too. On the downside those old cells were feather light (maybe because they had no balance connectors, so add another win).
              Paul Upton-Taylor, Greased Weasel Racing.

              Comment

              Working...