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  1. J

    What's a good e bike headlight?

    I use a Rigid D2 Hyperspot as a "high beam" on my e-bike. I doubt you will find any lights it's size with a longer throw ;) Top notch quality, but not inexpensive. I power it with an isolated DC-DC (do not use a non-isolated one). It's mounted on the fork. For "low beams" I use two 1000 lumen...
  2. J

    Ebike battery idea: can these prices be beat?

    I'm building a 30Ah 48V battery now, and it won't weigh much. Should fit most bikes. 13s9p 18650 using Sanyo NCR18650GA cells. Approx. 3350mAh at the discharge rate I will normally run. Total battery weigh incl. BMS, glue, nickel and wrap should be aroung 6,5kg I think.
  3. J

    Single cell charger with adjustable voltage?

    I think I finally found a suitable model: http://www.myrcmart.com/rcx-bc168-intelligent-battery-lipo-life-balance-charger-parallel-charging-p-4768.html It slooks like it can do three of the 2S2P modules at once too :)
  4. J

    Single cell charger with adjustable voltage?

    No, new cells will be charged ut at home and put into the battery when I go to my cabin. At that time the battery should be at 4.05V and thus the new cells should also be at that voltage. I already have 26 modules not assembled, where 18 are at 7.58V (2S2P in each module) and 8 are at 8.1V. So...
  5. J

    Single cell charger with adjustable voltage?

    The battery is for off-grid storage in a cabin in the norwegian mountains. When we leave we might not return until 5-6 weeks later. The battery will probably be charged full in a few days after we leave, thus staying at fully charged for several weeks. I have picked 4.05V as my fully charged...
  6. J

    Single cell charger with adjustable voltage?

    Can't do that. Since the pack will usually be charged to 4.05V I have to charge new modules to the same voltage when I add them to the pack. If not there will be sparks and significant current flow.
  7. J

    Single cell charger with adjustable voltage?

    Thanks for the suggestion, but I'm really looking for something finished, in a case, can be connected to 230V AC and with a display for setting the voltage. Price up to $100 is fine. I was looking at the iCharger 106B+ but it didn't seem like the voltage could be adjusted? The manual is kind of...
  8. J

    Single cell charger with adjustable voltage?

    I have aquired 26 Leaf modules I will use as an off-grid battery pack. Befor assembling the pack I need to make sure they are all at the same voltage as I will have to parallell 13 of them. Also I plan to get ahold of quite a few more which I will then need to integrate into the pack...
  9. J

    Measuring halls on Ezee motor without controller

    I have a Ezee 400W motor with a Infineon 25A controller on a full-suspension bike. It has worked only intermittently lately, and now it doesn't work at all. When given throttle, the wheel only moves a little and then stops. I have tried to measure the hall sensors with the controller connected...
  10. J

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    Uh, 8-10h ? Pretty low voltage and amps then ? The emerging standard for 3~ charging in Europe is 400V 63A, approx. 40kW. Charging time would then be 1.5 hours :)
  11. J

    Best headlight for about $100?

    Here's my take on the optimal e-bike frontlight that still looks like a bike light and not a car headlamp or flashlight: http://www.trailtech.net/4212-SX.html 1850 lumens for $150, in a 12 degree pattern :) I mounted it on my Ezee Forza instead of the pathetic standard led lamp. The original...
  12. J

    Braking System: Disc plus V-Brake up front

    I agree. Try a good hydraulic one, I like the Avid Code 5's with the 4-piston caliper. I only have a 185mm front and 165mm rear, these stop my Ezee Forza scary fast (like ~15 ft from 30mph). The long frame and rear weight bias (dual panniers, battery behind seat post) keep the bike from tipping...
  13. J

    Motor Runs in Reverse

    I have the same controller, and I had the same problems, spinning in reverse. Mine had a 2-pin connector on a short lead for controlling forward/reverse. I cut of the connector and twisted the wires together, that made the motor run forward instead.
  14. J

    Volts or Amps. Wheres the fun at!

    Pedaling is surely the thing for range then. On my morning commute, doing 19mhp on average (23mph top speed), my Ezee 38.4v (2.4v NiMh booster pack) setup draws 10-11 Wh/km (16-17 Wh/mile). This is with a low to moderate effort pedaling so I don't sweat.
  15. J

    Difference between Ezee kit and bikes ?

    Update! I remembered that I had some NiMh D-cells lying around (Titanium 12Ah). So I quickly made a 3.6V pack of 3 of them and wired up the Forza. CA then showed 43.7V. BUT. No throttle action! HVC was obviously cutting out :( Turns out that CA is NOT a reliable volt meter, it showed 1.4...
  16. J

    Difference between Ezee kit and bikes ?

    I've had my Forza a couple of weeks now and just got the Cycle Analyst installed. It does about 21-22mph on the flats with a moderate pedaling effort. I got the new 3.3kg Li-Poly battery. It is nowhere near 41.7V. It's at 40.4V when the charger goes green, 40.2V after disconnecting charger and...
  17. J

    Bosch 36V fatpacks opened up

    I don't see the problem, really ;) I used two evenings to make my battery, which should last at least 2-3 years. Other work on the bike takes much more time...
  18. J

    Bosch 36V fatpacks opened up

    I know everyone says not to split the packs but as I needed a very custom shape and 48V I had no choice. So I did this: Opened the packs and cut open the red plastic. No need for a dremel, a sharp knife removes the plastic in 10 seconds. Separated the cells in packs of one or two by cutting the...
  19. J

    Bosch 36V fatpacks opened up

    Well, I just ordered everything. Thanks for all the help here! 6 Bosch fatpacks from eBay (Toolsteal) Tenergy 13S Li-ion charger from All-battery Ezee rear kit with pedal sensor, 9-speed frewheel, left side half-throttle and Cycle Analyst from ebikes.ca It's my understandig that the Cycle...
  20. J

    Bosch 36V fatpacks opened up

    The problem is that I can't fit a big enough battery in the triangle-shaped frame bag without custom-building the pack. I have to stack the cells single (so 65mm deep) in a triangular shape. Probably start at 3 cells in the bottom, then 4,5,6 and so forth, until reaching 117 cells (13s9p) in the...
  21. J

    Bosch 36V fatpacks opened up

    What I'm more worried about is getting the cells out of their red plastic housing. Can they be pushed out somehow or does one need to cut open everyting ? That will be quite time-consuming...
  22. J

    Bosch 36V fatpacks opened up

    I wasn't thinking of removing the spot welds, only cutting the strips between the cells and using them as tabs. Wouldn't that work ?
  23. J

    Bosch 36V fatpacks opened up

    I am converting my Giant NRS 2 to an e-bike, probably with the Ezee rear kit from ebikes.ca. I need to mount the battery in the frame (no rack or fenders), so I'll probably get a custom frame bag from http://www.epicdesignsalaska.com/. The best way to assemble a triangle shaped battery seems...
  24. J

    Difference between Ezee kit and bikes ?

    I do have a Forza on order, just wondering about future possible upgrades. The Ezee battery case can be had for $25 so a 48V/10Ah battery can be built in two parts, one in the battey case and one strapped to the rack. If anybody knows more about the controller, I'm very interested. Does...
  25. J

    Difference between Ezee kit and bikes ?

    Does anybody know if there is any differences between the Ezee kit and what's on their bikers (like the Forza or Torq) ? I know the motor is rated differently, 350W on bikes and 400W in the kit, but I assume it can still be the same motor but with different rating ? What about the controller...
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