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  1. J

    Charging with higher voltage charger

    Could you adjust your 20S charger to correct voltage for the 16S battery? For example, I was able to adjust a 10S 42v kingpan type charger for use on 12S and 14S batteries.
  2. J

    Bionx bike with another Battery

    Justin has a video on replacing the controller: https://www.youtube.com/watch?v=Wc8OJtFRUng
  3. J

    MAC 10T Speed

    The simulator is supposed to be a real world simulation. I get 32.7kph with 10T on 36v: https://www.ebikes.ca/tools/simulator.html?motor=MMAC10T&hp=0&cont=C20
  4. J

    I broke a bolt in my hub motor. How do I get it out?

    I don't mean use a screwdriver as a screwdriver. What you can do is knock the upper edge on the right side with the screwdriver and hammer to turn it counter-clockwise a little at a time by giving it a few taps. It is much easier and quicker than the drilling method.
  5. J

    I broke a bolt in my hub motor. How do I get it out?

    Since you did make a slot, you can now take a screwdriver and hammer and try to unscrew it by tapping on the edge of the slot at an angle to unscrew. I have done this before and it usually works.
  6. J

    Charging dolphin pack with a 5amp charger

    The plug/socket on the battery may only be rated for 3 amps, so might overheat and melt. to add: I have had a em3ev Dolphin pack and this is what Paul has said.
  7. J

    Lightest motor for hill climbing and 135mm dropout with disk brake?

    you might want to research Xiongda double speed motor
  8. J

    Help! Batteries discharging quickly

    It is not necessary to load test separately. You can do the whole string at once with by connecting to something like a heater. I use one or two of those oil filled Delonghi ones, or light bulbs. Then periodically take the voltage of each battery and record over time to see if any are seriously...
  9. J

    Help Me Build My Daily Commuter?

    Radrover can be increased to 24mph limit (40kph) in menu setup. There is a facebook group for Rad bikes.
  10. J

    Help! Picking motor for my first touring build

    This is a better simulator for ebikes: https://www.ebikes.ca/tools/simulator.html
  11. J

    Stability issues

    I'm wondering if you tried sliding the saddle back? Even 1 inch makes a big difference in handling.
  12. J

    Stability issues

    Some things to try, is check headset for condition and proper adjustment. Lower handlebars. Move saddle back a few inches.
  13. J

    Choosing Ground

    One, there is no reason for it. Two, increases the possibility of an accidental short circuit.
  14. J

    How to connect wire to battery busbar

    Yes, but the lug has to fit your cable gauge exactly and you have to use a crimper with jaws made for that type of lug. Bus bar often has double row of holes for 2 hole lug.
  15. J

    How to connect wire to battery busbar

    I would suggest Burndy compression lugs.
  16. J

    Juiced Bikes pushes the envelope - HyperFat HF1100

    MAC factory visit: https://www.juicedbikes.com/blogs/news/hyperfat-1000-w-mac-motor-factory-visit Not quite sure how they are achieving that GPS 40mph. Specs say MAC 12T, 52v battery.
  17. J

    Battery Wiring N00b Query

    If the red probe from the meter is on positive and black probe on negative, the voltage will read as a positive number. If the reading is a negative number then you got it backwards.
  18. J

    Voltage drops off when doing full-throttle?

    Is that 3-4 volt drop at 1400-1500w?
  19. J

    Completely dead string?

    All the cells in that one dead group are paralleled, so one bad cell would drain all the cells in that group. All the cells in that group are 0 volts, and most likely ruined. Note: In battery terminology, "string" means serial string, not parallel group.
  20. J

    how to prepare multimeter newbie

    black cord to black hole red cord to V (for volts) dial to DC volts it doesn't need zero calibration
  21. J

    Rebuild of a 36V/12Ah lead-acid battery

    Take a look at your controller, it should have some specs on it like 7A continuous, 12A max current. The controller will determine how much current. Jon
  22. J

    Which motor and battery for touring rinding with some hills

    You can use this online motor sim tool to see when your motor will overheat: http://www.ebikes.ca/tools/simulator.html
  23. J

    Battery series wiring

    Before you take this guy's advice, realize he doesn't seem to know what a positive and negative ends of the cells look like and also has labeled the + and - incorrectly. So how much experience does he have?
  24. J

    Charger recommendations

    Take a look at the Meanwell HLG's in the classified section. Great deal @ 35.00 shipped. Quality should be commercial quality vs. the average plastic or kingpan charger.
  25. J

    Cell Tower Batteries- Info

    I do have a lot experience with these. I would charge them up and then take individual cell voltages to see if they hold a charge. They probably are somewhat damaged by not being on a charge for so long. For testing we used adjustable or automatic load banks that can keep a constant amperage and...
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