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  1. miniebiker

    Batteries that last 20 years.

    Like my Texaco packs ! :) TVs used to last 5 to 10 years. Now they are made to last 2 years or so. Computers and laptops too. That may be why I am finding so many laptop batteries so cheap ! They are for laptops older than 2 years and who wants a laptop that old ? The batteries are...
  2. miniebiker

    Spec sheet for A123 AMP20M1HD-A

    A123 shares up more than 40 percent http://www.reuters.com/article/2011/08/11/us-gm-battery-idUSTRE77A30D20110811
  3. miniebiker

    Imax B6 problems

    I bought 2. One smoked when I powered it up with no battery connected. Opened it up and the ic near the temp port was cooking. I have switched to this brand. http://hyperion-world.com/products/type/15
  4. miniebiker

    Batteries that last 20 years.

    I have 2 Texaco 36v ebike nimh packs about 11 years old that still get er done ! :)
  5. miniebiker

    LiPo V Lifepo4

    This is what they are rated and will do. New oem laptop battery packs are where these batteries are used. http://www.batteryonestop.com/baotongusa/products/datasheets/li-ion/Samsung-SDI-ICR18650-26A.pdf
  6. miniebiker

    Lipo Fire on Chick Bike

    I'm thinkin some of youse guys are pyros ! :)
  7. miniebiker

    No more Turnigy motors by Hobbyking?

    http://behindthewall.msnbc.msn.com/_news/2011/09/14/7763968-chinas-soaring-costs-could-help-american-jobs This was on the news about China. Hobbyking is out of a lot of stuff.
  8. miniebiker

    100 Mile Club

    I think LFP's observations are skewed by his speed racer spirit ! :)
  9. miniebiker

    100 Mile Club

    Cool stuff ! The book I pointed you to was to help you understand how DA gets the results he does. I am an older person that rode fast motorcycles for many years and lived to tell and I don't feel the need to go so fast anymore. :) 20mph or so on a bicycle is fast enough for me ! :) I have...
  10. miniebiker

    100 Mile Club

    On page 146 of Electric Bicycles A Guide to Design and Use it claims typically an electric bicycle will use about 10 Wh for each kilometer traveled with a rider mass of about 80 kg. Lots of test results in that book and a very good read. It can help you understand...
  11. miniebiker

    Is the "Volt-Up, Gear-Down" Theory Justified???

    Hey, think outside the box and design one that runs cool and does not waste power making extra heat :) That is a for sure sign of a well designed system ! :) And I hear you about bicycle components. Those cost money. A good chain can cost as much as a Walmart bike. I think I can design a...
  12. miniebiker

    Is the "Volt-Up, Gear-Down" Theory Justified???

    I guess this is the answer. http://www.youtube.com/watch?v=EZ2_sXwdaiw
  13. miniebiker

    Best Value for Money Ebikes

    http://www.google.com/#sclient=psy&hl=en&source=hp&q=electric+bicycle+site:craigslist.org&pbx=1&oq=electric+bicycle+site:craigslist.org&aq=f&aqi=&aql=&gs_sm=e&gs_upl=52532l60016l0l60407l21l21l1l0l0l2l234l3170l2.11.7l20l0&bav=on.2,or.r_gc.r_pw.&fp=2ea25270560d40fb&biw=1016&bih=563 No doubt...
  14. miniebiker

    Not simple BLDC controller It RUNS! :)

    Ouch. Sorry to hear that. Hang in there. Steve
  15. miniebiker

    Not simple BLDC controller It RUNS! :)

    Is that what goes on here ? So many times I click on something and it has been removed. I feel blessed when I click on a picture and it shows ! :)
  16. miniebiker

    I think I finally killed my PING v1

    Right ? I am still using NiMH Texaco packs over 10 years old. I got them real cheap because they would not charge because the temp sensors in both packs were bad.
  17. miniebiker

    Homemade Battery Packs

    With a 9 lb battery and a 5.5 lb motor. And a bullet proof brushed motor too ! That's what I'm talkin about ! :) A setup that total would add 25lbs or less to the weight of a bicycle and go 50+ miles on a charge. :) http://tncscooters.com/product.php?sku=106118
  18. miniebiker

    Most Annoying ...

    Rural Tampa ? 579 hill ? :)
  19. miniebiker

    Homemade Battery Packs

    My testing so far discharging at 1 amp shows very good performance with little temp rise.
  20. miniebiker

    Homemade Battery Packs

    It is important to know how many watts you need when you build a homemade battery pack. It is also important to read the data sheets from the factory on the batteries being used. It is also important to test the batteries so they can be matched. Know what your batteries can do so you can...
  21. miniebiker

    Homemade Battery Packs

    So far all the packs I have seen said country of origin and where they were put together. The packs all say assembled in China. Cell origin says either Japan, Korea or China cells. The ones I have that tested best said made in Korea, are pink and say Samsung on them. I found a data sheet for...
  22. miniebiker

    Homemade Battery Packs

    Are you using the numbers on the batteries or the numbers on the test to come up with 1.5C discharge is 5 amps ? You don't want to use these cells at 5 amps discharge. That is why you need to parallel them.
  23. miniebiker

    Homemade Battery Packs

    I know the batteries that are not rejects. The ones I pulled out of laptop packs. And they tend to match each other real well in the same pack. See the results of the fake Sony batteries ? All over the place. How ya gonna make a pack out of those ?
  24. miniebiker

    Homemade Battery Packs

    liveforphysics, Why would anyone want to use cheap made in China batteries to build a homemade battery pack ? ( some have no name or numbers at all on them ) That's what people use that are selling battery packs. I want it to be homemade because I want it to be the best. :)
  25. miniebiker

    Homemade Battery Packs

    I like the ones that are from the same factory that makes those pink Samsung cells ! :) They don't test the same as any others I have found ! :) Who makes those ? And would the charger I showed be ok for tests posted on this forum ? I want a charger that will give good results.
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