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  1. C

    Electric Rider LiFePO4 48V 15AH Battery w/ Rack and Top Peak Case

    How can I tell if the battery has a wattmeter or coulometer, as was mentioned by the previous poster? All I can see is it has a BMS. Is it worth me buying either of these tools at this point to measure any metrics? I no longer have the bike I used this battery on. I'm negotiable on my price...
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    Electric Rider LiFePO4 48V 15AH Battery w/ Rack and Top Peak Case

    Hello, would love to check? Forgive me but what all do I need to test it? A voltmeter?
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    Electric Rider LiFePO4 48V 15AH Battery w/ Rack and Top Peak Case

    I have an ElectricRider Lithium Iron Phosphate (LiFePO4) battery w/ BMS for sale. It is the LiF4815T model (48V 15AH). I bought originally bought it from another member here on the forum several years ago. I didn't use it much--maybe has 40-50 charge / discharge cycles on it and I really didn't...
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    Help! My 1st gen Crystalyte hub motor died

    I don't see anything out of the ordinary. Here is what it looks like.... Actually maybe those wire casing are melted, so you sir might be right.
  5. C

    Help! My 1st gen Crystalyte hub motor died

    Hey guys, I have an old Jamis Dakar mountain bike with a first generation Crystalyte CT4840 hub motor in the back wheel that I think I smoked the motor on. I was going up a steep hill full speed for about 6 minutes before I killed it. I'm not sure if it is easy to fix (or if it's even worth) but...
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    Lyen 12 Fet 48V controller - How to Retrofit Crystalyte?

    So I decided to scrap the old Crystalyte CT4840 and ordered a Lyen from Edward here on the forum. Now I'm trying to convert my Crystalyte wiring over to the connector types you have included. I noticed that my crystalyte wiring has the following differences: 1. My throttle cable has four wires...
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    Lyen 12 Fet 48V controller - How to Retrofit Crystalyte?

    So I replaced the 6 MOSFETS within this First Gen Phoenix/Crystalyte 4840 controller and still have the same problem with controller being broken. At this point I think its not worth messing with. I would like to replace it. Any recommendations? Maybe waterproof is the route to go and more...
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    Lyen 12 Fet 48V controller - How to Retrofit Crystalyte?

    Hey, awesome thanks guys. Yeah, seeing that I'm a newbie, I was just read up on this online and saw that the 4110s and the 3077s are both superior. What would be my benefit (if any) in upgrading to one of these on my stock CT4840 setup? Would it let me take better advantage of my motor/battery...
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    Lyen 12 Fet 48V controller - How to Retrofit Crystalyte?

    Very hard to read, but from what I can tell, they read as follows: 1RFB4310 1(downward pointing triangle?)R 706P 3C HT B4 (inside of a circle)
  10. C

    Lyen 12 Fet 48V controller - How to Retrofit Crystalyte?

    Hello All, I recently blew my controller and am wanting to replace the MOSFETs. I need to know the specifications on the MOSFETs so I buy the correct ones. Does anyone know what the specs for the older, first generation Crystalyte CT4840 controller are? Also, can the replacement MOSFETs be...
  11. C

    Broken Controller - Crystalyte CT4840

    Ok all, so I did finally tested the controller using the tester. It took awhile since I wanted to adapt the mini XLR connectors so I had to order those. Anyways, I made a video of what the tester shows. I'm guessing I will have to tear the controller apart and locate whatever part(s) I blew. Let...
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    Broken Controller - Crystalyte CT4840

    Hello 999zip999, I decided that I really hate having to back out the wires and use extra alligator clips as this would become a mess real fast. I will be picking up a male 5-pin XLR connector during my lunchhour today so that the hall wires of the tester can be adapted to the xlr connecter on...
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    Broken Controller - Crystalyte CT4840

    Total noob here....Don't quite know how this works but it seems that the connectors don't match up as I have a first gen Crystalyte??
  14. C

    Broken Controller - Crystalyte CT4840

    So I finally received my ebike tester from China. Its looks pretty shoddy but anyways, I don't get how to hookup this thing to test to see if I blew the MOSFETs within the controller. See below pictures to see what I have to work with. Can anyone point me in the right direction? thanks E-bike...
  15. C

    Broken Controller - Crystalyte CT4840

    I went back and tested by turning the wheel slowly. All three wires switched back and forth between 0 and roughly 4.84 volts--or thereabouts. I guess this rules out the halls sensors. Moving on to the test the MOSFETs in the controller... In the meantime, I am waiting on the brushless...
  16. C

    Broken Controller - Crystalyte CT4840

    I tested hall sensors as TheThirdWheel stated in his post. Using that PDF file (http://www.ebikes.ca/troubleshooting/HallSensorTestingFinal.pdf) The first part of the step where I test the voltages on all of the wires, all of the wiring reflected voltage readings of between 4-5 volts as needed...
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    Broken Controller - Crystalyte CT4840

    All, thanks for the help. I will try to take all into account. See below notes. @dogman Where do I buy one of these motor controller throttle testers? Any reccomendations on brand or type? @TheThirdWheel I will try all of your tests, it will take me some time. I have to go find my...
  18. C

    Broken Controller - Crystalyte CT4840

    Hello All, I'm somewhat of a newbie here. I have a Jamis Dakar fitted with a Phoenix/Crystalyte x5303 motor (1st generation with no disc brake). A couple months ago, I stupidly tried to climb a sidewalk curb from a stop and broke something within the Crystalyte x5303 motor. :oops: I remember...
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    Yuntong 48V 20 ah BMS Failure??

    cell # 13 has singular cell voltage reading of -44.4 volts. All others appear to be 4v. Not sure if this battery is worth deconstructing and rebuilding for the one cell, especially since the previous owner has used it to commute to work 11 miles during the summer so I would guess 100-200 charge...
  20. C

    Yuntong 48V 20 ah BMS Failure??

    I don't think they did but I will double check and will probably need to solder if this is the case. You didn't answer my clarification question....
  21. C

    Yuntong 48V 20 ah BMS Failure??

    Ohhhh. Ok. Both of what you and friendly1uk said about how to measure single cell voltage now makes sense. :lol: I did not know this. Just learning all this electrical stuff from scratch so thanks. To clarify, as far as the shrink tube, are you making this recommendation out of precaution so as...
  22. C

    Yuntong 48V 20 ah BMS Failure??

    Per your above statement, you're saying that if I run this test I might fry my multimeter? How could I test it then?.......
  23. C

    Yuntong 48V 20 ah BMS Failure??

    dnmun, I understand the logic behind doing a continuity test. However, I've never done one before. I looked some info online and found out that for continuity test I need to switch multimeter to "ohms" setting. Then I place each of the two multimeter test probes on the orange and red processor...
  24. C

    Yuntong 48V 20 ah BMS Failure??

    999zip999, I'm not sure how to do it this way, I only know how to get cumulative readings. I do this by placing black probe on B- and red probe on each wire connection in the back of the big white connector. I know you said to "move along" but I don't know what you mean by this. Can you advise...
  25. C

    Yuntong 48V 20 ah BMS Failure??

    I couldn't take the battery out but I did as above poster stated. I melted the glue, took out the white connector and measured voltages individually this way. All of them increased in 4 volt increments except for the black wire, which I assume was ground as no reading present, and also one of...
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