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  1. S

    Ultra power dense charger project.

    Any news anyone? Quite interesting thread !!! My Zero SR 2015 a couple of these converters, and some 115 v cut off ;-) Sent from my iPhone using Tapatalk
  2. S

    The Best Battery Bang For Your Buck!!!

    Really nice
  3. S

    2 Speed Xiongda hubmotor

    @John in CR Just as reliable as any geared hubmotor, but with the possible use of normal size batteries when delivering tons of torque, and a reasonable speed without any heat issues. Unlike most other motors where you must choose between torque or speed, or go with humongus batteries and have...
  4. S

    Building my next pack 12S72P (with 36P modules)

    My original "Ellert" did not have a controller. It had a hydraulic operated variable resistor and a relay shorting the resistor once the speed was past 25Kmh as i remember. The motor was the thrige pmdc and the batteries was 3S100ah 12v Range was 30-40 km and topspeed app 35kmh. Used it for...
  5. S

    Building my next pack 12S72P (with 36P modules)

    Reading the headlines i was thinking about my Ellert, (original City El) which i bought some 20 years ago. What motor and controller are you using?
  6. S

    Deciding optimal bulk charging voltage.

    Yiihaa, capacity mapping, thats what i was looking for. It's close to what i've supposed for some time. After a few 4.2V/cell charges/discharges i decided to roll down to 4.1V mainly to nurse the battery. at that time using a IMax b6 charger. I did slowly notice quite a drop in performance...
  7. S

    Are batteries more expensive than petrol?

    Panasonic 18650B cells cost about 3,90€ a pop at nkon.com That equals 4.3$ That is if you live in the EU
  8. S

    Why not Panasonic 18650pf

    I'm shure Samsung cells are good, but i do think Panasonic all in all makes the highest quality cells, taking in consideration not only max Amp but also cyclelife and product tollerence.
  9. S

    Deciding optimal bulk charging voltage.

    I've got a Bestech HCX 132, and are soon to connect it to a 12s5p Panasonic 18650B pack. To get the most out of it i wonder what'll be the best bulk charging voltage. Assume the cells are quite equal in capacity and voltage, i think that the best charge voltage will be just a tad under 12...
  10. S

    Why not Panasonic 18650pf

    ,}~%#~< The 18650PF's are gone. So opted for the 18650B cells instead. Just ordred 60, so a 12S5P pack is soon to emerge.. Bought them with Utag's so its only a matter of soldering it together with a Bestech HCX D132 Wonder how many Ah i will be able to to use before the LVC @ 3V kicks...
  11. S

    KT Controller settings LCD 3

    Found the fault, just retard the connectors between controller and motor 1-2 mm when assembling, and the shifting Works a treat. Yiihaa
  12. S

    Replacing magnets for more power

    Well, I'll not recommend any specific controller, but the one i'm using is a Porter from 4qd in England. It uses a magura throttle. It's rated at 30A afaik. I've measured up to 51A from a 10000 mAh 8s multistar battery. I do have an empty housing for a rearwheel, however you'll need a longer...
  13. S

    Why not Panasonic 18650pf

    I'll keep you posted
  14. S

    Replacing magnets for more power

    I've run 36v 40A through my 24V 400W heinzmann, if done properly, ie few seconds at a time, the heinzmann is a monster motor. I've bought my motors through german eBay. It's paramount to remember not to use it as a 750 or 1000w motor all the time. Used with comon sense it's a marvelous motor...
  15. S

    Replacing magnets for more power

    I Think not. Anyhow i do have several heinzman motors, the old 24v 400w type. If you use a controller that isn't current limited, you can easily push 40-50amps, at which current the frontwheel will loose traction on anything other than asphalt.
  16. S

    Why not Panasonic 18650pf

    @999zip999 I dont have a welder, but might make a CD welder. Or i might buy cells with solder tags.
  17. S

    Why not Panasonic 18650pf

    @Offroader I do at the moment charge my multistar at 4A, which is a bit too much, the bulk charger i'm using is outputting 200w. Better than my 50w iMax 6 charging at 3A but one 4S pack at a time. ;-) Thats about 10hours for a depleated pack ! The bulk charger is 2.5 hours. The charge time...
  18. S

    Why not Panasonic 18650pf

    @ wesnewell With 6p at 2900mAh the 1C will be 17.400mA. Thus the max 15A current draw will be less than 1C. As described almost all my driving is in assist stage 3 which is < 250W, thus i should at 44V be drawing about 5.5A equal to about 3 hours assist or app 75km range.
  19. S

    Why not Panasonic 18650pf

    Hi I'm a everyday cyclist, using a xiongda XD 2speed motor to haul my fat ass to and from work every day. Until now i've been using 3 4s 10000mah multistar batteries, Works allright, but seem's to slowly loose capacity, i've done about 150cycles normaly down to about 3.7-3.8V at rest. Now i'm...
  20. S

    2 Speed Xiongda hubmotor

    I have had exactly the same idea, but i Think it'll only work Well with fluids that spread out, not thick grease. As it'll not reach the innards of the ringgear parts of the gearbox.
  21. S

    2 Speed Xiongda hubmotor

    Yiihaa my ring gear has arrived. Bonnie at xiongda is just marvelous.
  22. S

    2 Speed Xiongda hubmotor

    Bonnie promptly offered me to send replacement ring gear and hi n LO gears. Also asked if i needed a new clutch, which i did'nt Best service i've experienced from china by far. Even better than ebike service in Denmark or germany Marvelous. Yiihaa
  23. S

    Multistar lipo questions / issues / solutions

    Im using 3 4's 10000mAh multistars for my xiongda XD powered bike. When in assist level 2 just about 200w i get about 55-60km on one charge. Max assist speed is 25kmh. I currently use lvc alarms, the batteries are quite equal in voltage until ive lifted about 8ah out of them, after that one of...
  24. S

    2 Speed Xiongda hubmotor

    Well that's not so good, the ring gear is nackered, partly because the nylon is rather worn, explaining the noise, and the clutching is due to a broken ring in the ring gear. DAMN In the meantime i've found out that the reason for my motor not automaticly shifting to lo settings when i come...
  25. S

    2 Speed Xiongda hubmotor

    AARRGHHH, yesterday, just arriving at work, stopped to talk to an other ebiker, i mounted my bike, as i applied full throttle in low gear and a snap sounded, think the ring gear broke There is no traction in low gear no more. Luckily i could drive home in high gear. Now i wonder what Bonnie @...
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