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  1. xyster

    Man Reportedly Killed In Cellphone Lipo Explosion

    http://crave.cnet.com/8301-1_105-9824853-1.html Many of us carry significantly more lithium cobalt firepower....since the risk of occurrence is very low, and the risk of seriously bad consequences from an occurrence still just moderate, if it didn't cost probably a hundred bucks or more I'd...
  2. xyster

    Two Interesting New Lithium Breeds At BatterySp.

    Giant, 60ah 2C li-ion cells for $520 each: http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=4058 Prismatic 10ah 2C LiFePoooo cells for $60 each: http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=4053
  3. xyster

    Highly Enlightening Presentation 4 The Entrepreneur

    Well worth the time to click through the slides: http://www.slideshare.net/rolfsky/web20-why-we-got-here-and-whats-next/
  4. xyster

    What's Your Opinion....

    No offense Ypedal, I just have to test an assumption about opinion polls -- with an opinion poll. :mrgreen:
  5. xyster

    Locked Library For Super-Useful Posts.

    Bob McRee's simple and definitive post regarding the use of capacitors on ebikes http://endless-sphere.com/forums/viewtopic.php?t=2200 (8th post down) got me thinking: we should build a locked library of posts such as this, perhaps placed in their own separate section, that are selected by...
  6. xyster

    Case of the Exploding NiMH Pack.

    Most of us are very aware of the risks with lithium cobalt, mainly when accidentally overcharged. I came across this post about a similar problem when NiMH chargers don't terminate the charge properly. I remember some discussions here about nickel batteries venting and oozing, but never...
  7. xyster

    exact low-voltage cutoff of 72V 40A Controller ?

    Welcome. Unless specified otherwise, the 72v controllers come with a 29 volt cut-off -- too low to use as a cut-off for your proposed lithium pack. Since you don't want to open it up, the CycleAnalyst, with a programmable LVC, is probably the best option: http://www.ebikes.ca/drainbrain.shtml...
  8. xyster

    Drat! Got My First Flat

    After over 2,000 combined miles between my 3 EV's, I finally got my first flat yesterday. Happened to the front tire of my X5. I was using the original, thin tube and original tire with a panaracer kevlar liner [edit: later determined I had never installed said kevlar liner]. A 1/2" shard of...
  9. xyster

    Put Homemade Torque Arms On My X5

    Took about 2 hours to cut both torque arms from a stainless steel tie using an old, wimpy 12V cordless drill and an 18v cordless reciprocating saw. Took about two days for their batteries to recharge between work sessions. :roll: Still need to cut another hole for the 2nd bolt on the left side...
  10. xyster

    Survey of All-Time Most Useful Inventions....

    Xyster's Top-6 list of all-time most useful inventions: 1)Fire 2)Electricity 3)Vise Grips 4)Duct Tape 5)Crazy Glue 6)Hose Clamps What's on your list?
  11. xyster

    Scary-Big New LiPo....

    25ah cell for $120. Only 1C though. Wish all-battery would get with the program and start selling LiMn and LiFePO4. http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1963
  12. xyster

    "Hold Onto Your Butts!" 0-30mph Acceleration Test

    So with a ~10 second 0-30mph time, it's no Lowell-mobile. But this is a 2 second improvement over the same power in a 24" wheel. :D Thanks to knightmb for hosting these videos! :D Embedded Flash (if it doesn't work, try either the quicktime or windows media versions linked below): <embed...
  13. xyster

    Video: Take A Wild Ride With Forest-Trail Xyster

    <embed src="http://endless-sphere.com/forums/download.php?id=3409" quality="best" bgcolor="#ffffff" width="640" height="480" name="Forest_Ride" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"> The...
  14. xyster

    24" Wheel Vs. 20": Brief Hill Climb Speed Test

    Where I often ride there's a short, very steep paved bike trail offshoot that I like to use for hill climbing tests. I haven't measured the grade yet -- guessing 15-20%. I've yet to see a cyclist try it. Full throttle from a 10 mph rolling start; no pedaling; 5304 at 35 amps: 24" wheel at 72...
  15. xyster

    Tools,Skills,Materials, & Process Required To Fab A Bike

    Let's say I want to follow the footsteps of some others here and fabricate my own bike from aluminum or steel, or perform a major ICE-ectomy and E-transplant procedure on a gasser. I've diligently read other people's build threads, but don't have a good grasp yet. Which tools do I need for...
  16. xyster

    Build: Cramming An X5 Into A 20" Wheel

    Now that I've received the help needed from you good people, http://endless-sphere.com/forums/viewtopic.php?t=1524 and ordered the parts, I've started the process of downsizing my wheel. While waiting for the 20" wheel and other parts to arrive, I fabricated a shock extension per Ypedal's most...
  17. xyster

    Need Advice For Switching An X5 Into A 20" Wheel

    I'm interested in re-lacing my X5 into a 20" from a 24" wheel. I never operate the bike near it's 44mph top speed, and I am looking for better acceleration and hill climbing power. To do that, I need solutions to the following problems: 1) Pedal Clearance The pedals might just barely clear the...
  18. xyster

    Two New Cells From A123...

    I didn't find any specs, and they don't specifically say it's lithium phospate like the M1. Does anybody know anything else about these? http://www.a123systems.com/newsite/index.php#/products/cells32series/ 32 Series Automotive Class Lithium Ionâ„¢ Cells: A123Systems recognizes...
  19. xyster

    New Box, Connectors, Tested/Rewired Cells=6 volts Less Sag!

    Suspicious I had a faulty cell or two and wanting to install powerpole connectors, a main power relay, and other goodies, last week I tore down my bike. This thread details the rebuilding. I started by designing and building a new box, and load testing each of the 300 cells. So far out of...
  20. xyster

    Easy Glider: One Nice Tire

    http://www.engadget.com/2007/06/16/the-easy-glider-is-your-personal-one-wheeled-electric-chariot/ The Hookworm tire looks like the most practical part...
  21. xyster

    Super Cheap Nicad Powertool Packs For SLA Replacement?

    Yesterday while perusing my local Harborfreight store for a 18v nicad powertool pack to replace my old Ryobi pack that just died, I noticed Drillmaster 1.7ah Nicad packs on sale for $10. http://www.harborfreight.com/cpi/ctaf/Category.taf?CategoryID=143&pricetype= If like my Ryobi pack, they're...
  22. xyster

    Your System's Power Density

    What's your favorite e-ride's power density expressed as Watts/Kg, including peak motor efficiency and total rider + bike weight? (including batteries, motor, etc) If unsure of peak efficiency, use 90% for brushless systems, and 80% for brushed. Results should create a distribution curve we...
  23. xyster

    Mod Request: can we be allowed more poll selection options?

    I tried to post a poll with 14 selection options but received an error message. I cut the options to eleven, but that was still too many. I wanted to create a statistical distribution curve requiring consecutive integer ranges from 1 to 40 in groups of 2 or 3. Any way to raise the limit to...
  24. xyster

    New Separator For Safer Lithium

    http://www.technologyreview.com/Energy/18762/ "A new polymer material could prevent the type of battery explosions that led to last year's massive recalls of lithium-ion laptop batteries. (See "Safer Lithium-Ion Batteries.") By making such batteries safer, the new material could help clear the...
  25. xyster

    Back In A Currie: 06 Mongoose Review

    Hello. Long time no see :) Hope nobody got run-over, suffered serious drain bamage or anything... I just purchased an '06 24V 35A Mongoose through Currie's new Amazon site. The bike arrived in the allotted time, and in good apparent condition, except for a broken battery box plug receptacle --...
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