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  1. TECH_GEEK10

    What draws more current as more power is applied other than the motor?

    I have a new bike build I am setting up with a cycle analyst 3, grin phaserunner 6, std wind grin rear all axle hub motor, erider torque sensor, 72v 20ah 80A battery, 400w dc-dc converter powering ca3. I have finished assembling it and it spins the wheel when unloaded, but when I ride it I...
  2. TECH_GEEK10

    How can I test a battery's health

    I have 36v 20Ah lithium pack that I have no knowledge of its past use. I am able to get about 5 to 15 miles on a single charge without pedaling at all, just constant 100% throttle with a 250w controller, geared sensored 350w? rear hub motor on a steel frame. I load the bike with 200 to 250...
  3. TECH_GEEK10

    Need some info on importing large battery from China into US

    I own a very old, no-name Ebike that needs a new battery. The battery that needs to be replaced is a 36V/42V - 20Ah pack that mount inside a special rack parallel to, and behind the seat post. I found only one result that is large/tall enough in my searches found here. It looks like it will be...
  4. TECH_GEEK10

    Do you know anything about this controller?

    I have a brushless E-bike controller that I need your help to identify. If you know, or think you might know, anything at all about this controller please let me know. Thanks.
  5. TECH_GEEK10

    Need basic help understanding a shunt

    I have a 48v charger that I modded to have a proper charging voltage for a 36v lithium ion pack. The drop in the output voltage seems to have messed up how much current the charger thinks it is outputting and how much is actually put out. The amount of current output that is actually supplied is...
  6. TECH_GEEK10

    Can this model of charger be set to 42V?

    I need a charger for my Ebike with a 36V 15Ah Lithium Ion pack. I found this charger on ebay and would like to know if it has those potentiometers that adjust the charging voltage and if they will let the voltage go down to 41V/42V.
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