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  1. patrick_mahoney

    Ping 48V 15Ah LiFePo battery after a year

    First off, I have no affiliation with anyone in the E-bike business.. I'm just a guy who likes electric motors and bicycles. I bought a 48V 15Ah Lithium Iron Phosphate battery from Ping via his website last year in May 2009. Since then I've ridden something around 120 commuting trips along my...
  2. patrick_mahoney

    Article from an engineering magazine about future batteries

    There's an article in the Nov. 2007 issue of the IEEE Spectrum (IEEE => Institute of Electrical and Electronic Engineers) about the future of batteries and sees a growing synergy between batteries and ultracapacitors in the future. http://www.spectrum.ieee.org/nov07/5636 and later
  3. patrick_mahoney

    News.com: China e-bikes drive lead metal demand

    Chinese e-bikes are increasing prices for lead: http://www.news.com/China-e-bikes-silently-drive-lead-demand/2100-11392_3-6212734.html?tag=nefd.top
  4. patrick_mahoney

    3.7V 50Ah Lithium Polymer cell at all-battery.com

    http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1967 Approx 1.4Kg Length：225mm Max Width：212mm Max Thickness：13.5mm Max And now, of course, the bad news: Cycle Life : ≥ 300 Times (80% of capacity discharged/charged) Max. Discharge Current: 1.0C (50A) Price: $239 And it's...
  5. patrick_mahoney

    Lithium polymer battery shut-off in rocket

    I was reading on Slashdot.org about John Carmack's Armadillo Aerospace's rocket crash. Reposted over at Slashdot: http://hardware.slashdot.org/comments.pl?sid=276831&threshold=-1&commentsort=3&mode=thread&cid=20322177 In a post to the forum, John Carmack mentioned: It wasn't the cause of the...
  6. patrick_mahoney

    Long E-bike trip - 35 miles up into Rocky foothills

    It was a hot day in Fort Collins and I wanted to do something fun... so I decided to take a long-ish trip on my electric bicycle. I packed some water, charged the e-bike battery pack to close-to-full, I added new batteries to my GPS and reset the trip statistics and headed out. I kept the...
  7. patrick_mahoney

    A123 3.3V 2.3Ah cells sold individually

    I've purchased from Aircraft World before and they have been consistently reliable for me. Their shipping isn't bad either for shipping from Japan. I don't have anything to do with Aircraft-world aside from having been a previous customer, and am merely posting this because they are the first...
  8. patrick_mahoney

    Common high current connectors - and my opinion on them

    Commonly used connectors are: Dean's Ultras - They are polarized (positive can only go to positive, neg only to neg), have an 80A current limit, and make a very solid connection. They can be difficult to unplug though, the female end of the connectors (used on battery end) are shielded, but the...
  9. patrick_mahoney

    44V 17.6Ah 18650 lithium ion (cobalt) battery pack

    I'd originally posted up a long battery-pack creation thread over at the old Visforvoltage site, and I've been waiting for that site to do some form of resurrection so that I could re-post it here, but I think I've given up hope. So here is my battery build thread, re-written for...
  10. patrick_mahoney

    3.7, 14.8V 16Ah prismatic lithium polymer cells/packs

    I'm on the email mailing list for all-battery.com and get their new product updates, and their coupons. They emailed yesterday with new products that may be of interest to this group: Polymer Li-Ion Battery, 3.7V 16000mAh (68135170) $72.99 Which is a single-cell 3.7V 16Ah lithium...
  11. patrick_mahoney

    Fixing a dead Crystalyte controller

    Inspired by Knoxie's thread about fixing dead controllers, I decided to try my hand at fixing a dead controller that I have. I received it with my Crystalyte x5304, but it was dead when I went to hook it up. I spent a while messing with it, but I could never get it to work. I emailed the...
  12. patrick_mahoney

    CNet (news.com) article about upcoming electric cars

    I thought it was a pretty interesting - some of the names mentioned were unfamiliar to me. http://news.com.com/Electric+cars+Little+juice+coupes/2100-11389_3-6164267.html?tag=st.num
  13. patrick_mahoney

    My DIY 56V 20W Xenon lighting system my e-bike project

    I've been riding with a DIY "Home Depot" bicycle headlight based on instructions that I found somewhere on the web that looked mostly like these: http://www.bike-recumbent.com/headlight.shtml I used a 20W 12V MR16 halogen from Home Depot. I spray-painted it black to match the bicycle...
  14. patrick_mahoney

    Mitsubishi to build lithium ion car batteries

    I'm not sure if this is a general discussion topic or a technical topic, but I thought it was interesting news. http://news.com.com/Mitsubishi+to+build+lithium+ion+car+batteries/2100-11389_3-6152367.html?tag=nefd.top
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