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  1. G

    Should I rebuild a 72v lithium battery

    Ok, thanks for saving me the expense and heartache!
  2. G

    New battery for stealth bomber e-bike

    I’m trying to order a 72volt , 24-30 amp hour battery that needs to fit in the battery compartment of the bike. 355mm long 120mm wide 160mm deep I see some batteries that say they fit but the dimensions are slightly too big for my compartment. I want a decent battery but Doesn’t have to be...
  3. G

    Should I rebuild a 72v lithium battery

    The battery is from a stealth bomber electric bike. It’s 72volts and 24 or more amp hours. The battery is 4 years old. It went dead after 500 miles and I bumped it back to life with my lead acid charger. I could always go almost 20 miles range. It went another 500 miles then this summer it...
  4. G

    Should I buy used batteries on eBay?

    I’ve been seeing tons of used cells on eBay from Panasonic and a123. Alarmhookup has quite a few different configurations removed from medical and military applications as well as individual 18650 cells. They have thousands of reviews and a high seller rating. Does anyone have any experience...
  5. G

    Need millipak calibrator

    Just getting my sevcon millipak connected to an etek motor and it looks like I have to have a $250 calibrator to change the factory settings. Can I borrow or rent this from someone?? Forever grateful!
  6. G

    Looking for a brushless controller with PWM

    lebowski said his will not work... Looking at your, eh, vehicle, is it some sort of self balancing segway type thing ? For this my controller is not suitable... Mine is meant for a bicycle or car type vehicle. When you select reverse my controller will jump into a regen mode where it slows the...
  7. G

    Looking for a brushless controller with PWM

    Looks like lebowski has what I'm looking for. Hope it's not beyond my technical ability... Thanks! Glenn
  8. G

    Looking for a brushless controller with PWM

    I've been building some self balancing vehicles and I use an arduino outputting pwm to drive them. glennselectric.blogspot.com Now I want to control a brushless hub motor. I'm having trouble finding something that meets my spec: -48v -100 or so amps peak -direct and instant control of speed...
  9. G

    Need help selecting lifp04 battery

    Okay, think I'll try the a123 from zero emissions. I would not usually order stuff from china that only accepts paypal, but since they are endorsed by endless sphere I'll do it. Thanks for the help... Glenn
  10. G

    Need help selecting lifp04 battery

    14.4v should be close enough to 12v for my apps...
  11. G

    Need help selecting lifp04 battery

    Here is what I think I need for multiple robot / Segway projects I have with various voltage and amp hour needs. Four 12v lifepo4 packs between 5 and 10ah. I want to use the packs in series or parallel to get higher voltage or ah depending on my project. A good charger ( or 4 chargers) to...
  12. G

    Will regen braking damage a lifepo4?

    The vehicles are only ebike size, and should only generate 20 amps tops, and just a few seconds. I would like 10 amp hours and 36v. Can you recommend a BMs and pack that would accommodate 20 amp bursts of regen... Thanks, Glenn
  13. G

    Will regen braking damage a lifepo4?

    I had a $700 Chinese lipo that fried a couple years ago after it had a full charge and the regen brake kicked in. I want to buy another pack for Segway type robotics projects and they can generate quite a bit of regen. I am strongly considering nimh, but would gladly switch to lifpo4 if I knew...
  14. G

    Controlling a brushless hub motor with arduino

    I have several hub motors with 3 power leads and 5 sensor pins. I'd like to drive these motors from an arduino. I ordered the open source motor controller ( osmc) for burshed motors, and I'd like the same thing for brushless... http://www.robotmarketplace.com/products/0-OSMC.html Thanks!! Glenn
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