Powerwheels upgrade. 6v to 18v

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    Powerwheels upgrade. 6v to 18v

    ​Our UPS man is awesome and helps us out a bunch. I repaid the favor a few weekends ago helping him swap in some Milwaukee 18V batteries into his kids power wheels. Going from 6v to 18v was too much for his youngest, and he wants to slow it down a touch. I tried a 12v, but that was still too fast. Does anyone know what kind of potentiometer would work best for this application?
    Thanks!!​

    #2
    Can you grab one of the "slow/fast" transformers out of a power wheels that has that option?

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      #3
      you won't find one large enough to take the current.

      a big ass heat sinked resistor would probably do it if you had an idea of what the motor drew and what voltage you wanted.

      the other option would be two 4V cells in series to get you 8V.
      https://www.batterymart.com/p-sla-ub...a-battery.html

      or an 8v battery if it fits
      https://www.batterymart.com/p-sla-ps-832.html

      there are 8V maintainers as well so charging would be easy.
      https://www.amazon.com/Suuwer-Automa...4936896&sr=8-5
      Penguins can't fly, I can't fly, therefore I am a penguin.

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        #4
        Some of the slow/fast power wheels did it by switching the motors series/parallel, so in low speed it would put half voltage to each, in high speed it would put full voltage to each. Is this a single motor or dual motor power wheels? The interesting side effect is, low speed acts sort of like an open diff, and high speed, sort of like a spool, in those.

        If you want to do it with a resistor (I don't think you'll find a potentiometer that big without spending more than a power wheels on it) ideally you want to know how many amps it's pulling, do you have an amp meter that can measure it?

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          #5
          This thread is worthless without pics of said death trap power wheels

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            #6
            Nothing useful to add except once I put a motorcycle battery and wrapped inner tubes around the rear wheels of my sons quad he crashed a lot, but it hauled the mail.

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              #7
              find the part in a golf cart, electric one that is!

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                #8
                Originally posted by dave_dj1 View Post
                find the part in a golf cart, electric one that is!
                most of the old school ones use spring style resistors.
                they're set up for 24v. resistance will be all wrong for this.
                Penguins can't fly, I can't fly, therefore I am a penguin.

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                  #9
                  My buddy put a 24V aircraft battery in one for his daughter. He had to put screws in the rear tires so it wouldn't just spin them the entire time, then screws in the front tires so she could almost steer it.

                  The gears in the rear end gave up shortly after.


                  No advice other than don't do that.

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                    #10
                    Originally posted by 87manche View Post

                    most of the old school ones use spring style resistors.
                    they're set up for 24v. resistance will be all wrong for this.
                    Train? Or electric car? Can the battery be tapped in the middle so 9/18 volts?

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                      #11
                      Originally posted by dave_dj1 View Post

                      Train? Or electric car? Can the battery be tapped in the middle so 9/18 volts?
                      model trains are all powered with a variac, essentially.
                      electric cars are all brushless ac motors controlled with thousands of dollars of electrics.

                      You can't tap the balance ports of a lithium pack for power.

                      the solution here is to put an 8V battery in it for $20.
                      Penguins can't fly, I can't fly, therefore I am a penguin.

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                        #12
                        I got some pre wired speed limiters from a place called electric scooter parts . Com they may have a plug and play deal you adjust with a philips. Worked ok but once you drop below 50% its a little jerky

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                          #13
                          Kid just needs to get used to all that pair!!!!!!


                          wife found this on the side of the road...
                          Attached Files
                          Last edited by Gregj50!!!!!; 07-16-2020, 08:23 PM. Reason: Wifey!!!

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                            #14
                            https://www.youtube.com/watch?v=sqKLZlu6k7Y

                            Looks like this is the unit you need:
                            https://www.amazon.com/dp/B071NQ5G71...advlog_dp_vv_d

                            Comment


                              #15
                              i had a similar problem on a small power wheel car thing. was 6v put in 18v and the sob instantly looped... too much. put in the 12v still scared the crap out of my kid.

                              then i put a small wheelie bar on it and the kids wore the tires off it. now were onto the bigger ones at 18v and i'm actually replacing tires on them

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