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  1. W

    What causes stone dead cell groups in a tool pack?

    Looking at it closely, i don't think the board does any balancing. It looks like it's just an interface board between the battery and the charger with a temp sensor. None of the resistors look big enough to me to do any balancing.
  2. W

    What causes stone dead cell groups in a tool pack?

    So the board in the pack is a balancing board? Have you looked into how it functions at all?
  3. W

    What causes stone dead cell groups in a tool pack?

    Interesting, mine were both samsung INR 15L's. May just be coincidence then.
  4. W

    What causes stone dead cell groups in a tool pack?

    Which Dewalt pack was the fault in? I have had similar experiences with two older 3AH packs. I haven't had a 4AH pack go bad yet.
  5. W

    World Domination, I just got my self a 3d Printer!!!

    We have decent luck with our Flash Forge Dreamer, it's well under 2k. All of these machines have their moments of course...
  6. W

    New cordless tool batteries inbound

    I like it. Someone with a 3D printer could easily make something similar and easier to replicate.
  7. W

    New cordless tool batteries inbound

    These look great to me: http://www.dewalt.com/products/accessories/batteries-and-chargers/batteries/20v60v-max-flex-volt-60ah-battery-2pk/dcb606-2 They are dual configuration with an internal switching system, either 5s3p or 15s1p. Currently using 2AH cells, there should be a version using 3AH...
  8. W

    Be careful out there...

    http://www.justicenewsflash.com/2015/11/02/when-fort-worth-wrecks-are-caused-by-repeated-bad-behaviors-of-reckless-drivers_20151102136024.html
  9. W

    Bafang BBSHD, 1000W, 68mm-120mm BB

    I ripped one to shreds early on. http://i244.photobucket.com/albums/gg23/phillyzj/Ebike/IMG_20150520_1840018_rewind_zpswlyvzty9.jpg This was with 50-60 miles on it i think. I blame it on user error, i was running 25A and 60V and slammed the throttle on. Didn't fail immediately, waited until i...
  10. W

    Bafang BBS01 & BBS02 Owners - POST REPAIR CLAIMS!

    1. Drive Serial Number & Manufacture Date:1501311252 2. Drive Model including Voltage, Amperage Rating Stamped on bottom and Wattage: BBS02, 48V, 750W. 48V 25A Controller 3. Supplier from which you Purchased your Bafang BBS0x Kit.: Unknown, bought it second hand. 4. Approximate mileage at...
  11. W

    Bafang BBSxx - fault finding and fixes

    Ever figure this out? I am having error 30 issues with my BBS02. I have ~800 miles on it at this point. I tried connecting to the controller with the empowered cable, but no luck there. I had never tried it, but seems like it should work. This makes me think it's in the controller...
  12. W

    Maximum voltage for BBS02 750W ?

    While not really recommended, I run my BBS02 at 15S. I'm using drill batteries and they are 5s, so until I rip them apart and build my own pack 15S it is. It may not be ideal or idiotproof but it works fine for me. I have >500 miles on this configuration so far. Fully charged off the Dewalt...
  13. W

    3D metal printer

    We do 3d printing at work and have a direct to metal machine. I have been too afraid to ask at work what it costs to make parts. The materials that we use for the process are incredibly expensive. I think they have to be extremely pure to get it work correctly which drives up the cost as well...
  14. W

    Adopting Power Tool Batteries to Our Broader Uses

    Old post...but: Dewalt is using 18650 cells currently. not all that different from the Tesla Cells. I'm currently using 6 4ah 20V Max packs for my bike.
  15. W

    2 60v 20a lifepo4

    I bought the XT90 anti-spark connectors, they work great at 15S.
  16. W

    Electric/Gas Truck

    I thought this was an interesting idea: http://300mpg.org/2012/08/13/diy-hybrid-pickup-truck/
  17. W

    Can a 12s BMS be charged by 55V or 58V charger?

    That battery doesn't look as huge as I imagined from your description. Not sure i'd like the pedals having no resistance whatsoever. Those brakes also seem like they might be a bit on the sketchy side for 30-35? Looks like you are local-ish to me. I'm pretty new to the E-bike community but...
  18. W

    diod between batteries in series

    There are some options: not too cheap i am guessing: http://www.battery-management-voltage-converter.com/e1154_10a_12v-24v_split_charger.html some other options: http://www.yandina.com/troll24info.htm http://www.powerstream.com/dc12-24-doubler.htm
  19. W

    Bafang BBS01 & BBS02 Owners - POST REPAIR CLAIMS!

    I'll put two of these down. I bought the unit second hand but the PO had issues with it and I fixed it. 1. Drive Serial Number & Manufacture Date:1501311252 2. Drive Model including Voltage, Amperage Rating Stamped on bottom and Wattage: BBS02, 48V, 750W. 48V 25A Controller 3. Supplier from...
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