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  1. R

    LIQUIDATION SALE! UNUSED 48V 10.5Ah 30A battery pack - $65

    Sadly this guy scammed me and several others. It's been 3 months. He's responded to texts a month ago saying he'd ship out, but nothing. No response in 20 texts. I'm trying to gather information from people that have also been scammed so we can file a police report together, as he admitted...
  2. R

    LIQUIDATION SALE! $90 for 36v 15.3ah (551wh) UNUSED and LOCKED Ninebot G30 Max battery

    Just an FYI this guy scammed me. Payed in late December and nothing. He's told me 3 times that he's gotten COVID pneumonia. It's been nothing but excuses. He texted back a couple times saying he'd make everything right and send me extra cells also asked if I wanted a refund. I responded saying I...
  3. R

    LIQUIDATION SALE! $1.5 per cell NCR 18650 GA 3450 mAh 92%-98% UNUSED

    Just an FYI this guy scammed me. Payed in late December and nothing. He's told me 3 times that he's gotten COVID pneumonia. It's been nothing but excuses. He texted back a couple times saying he'd make everything right and send me extra cells also asked if I wanted a refund. I responded...
  4. R

    SOLD Bafang BBS02 750W Mid drive kit (never used, just opened) USA

    SOLD Hello, I'm selling a new never used Bafang BBS02 kit. I had plans to install this kit on a bike, but those plans changed and I went a different route. The kits brand new never used, I just opened it. BBS02 Motor C963 Display 48T Sprocket 68mm bottom bracket Selling it for $400 +...
  5. R

    Rebuilding a Segway I2 Battery

    I'm pretty sure they are 18650 LiFePo4's.
  6. R

    Actual Test of Pure Nickel Heat?

    I did the test a couple years ago. It was either 5 or 10 minutes. Certainly long enough to heat soak the material. Keep in mind that real world results will vary a little. This testing was done with the nickel in "open air" on both sides.
  7. R

    Actual Test of Pure Nickel Heat?

    You will be just fine. Likely your nickel will be <10C above ambient temperatures at that current.
  8. R

    Actual Test of Pure Nickel Heat?

    Yes, I've done testing:
  9. R

    Anyone dealt with Tech Direct Inc. LG Chem Modules

    Is this the same company that was selling Leaf modules that only had ~50% of original capacity? In general the industry deems anything in the 70-80% of original capacity range to be end of life (EOL). So you shouldn't buy anything like that. What capacity were the cells originally and what is...
  10. R

    Which glue to join cells ?

    When I have to glue cells together I use Quick Grip. It works great, highly recommended! Been using it for years. Part number 873388
  11. R

    The proper (fastest) way solder 18650 cells

    The best way to soldier 18650's is not to solder them at all. Spot weld.
  12. R

    Power tool batteries...interchangeability ?

    Black and Decker 36v/40v and Die Hard 40v packs are the same thing. At least the versions that look the same are the same. Ryobi and craftsman 4v packs (the 1x18650 ones) are the same.
  13. R

    bought 3 batteres. Shows 3,58V on every 4p. Scam?

    ~3.6v is very typical for new cells. They made SOC for shipping even more strict in the past couple of years I think its <30% SOC now.
  14. R

    Chinese VTC6 Clones are confusing the crap out of me please help.

    VTC6 clones? Why are you buying clones?
  15. R

    A simple but practical and cheap EV range extender?

    "The power is coming off the battery terminals, I never said that the battery was being discharged. The DC-DC converter works most likely very similarly to the way a ICE car's alternator charges the battery powers accessories through the battery, but without cycling the battery." Is it that...
  16. R

    A simple but practical and cheap EV range extender?

    Completely incorrect just as I originally guessed. Just took a clamp meter and tested the car under various load conditions. It draws 25A upon startup (when some pump is running, presumably some hydraulic pump for breaks/power steering). Then settles down to around 20A with headlights on...
  17. R

    A simple but practical and cheap EV range extender?

    Sorry, you are not making sense, and I believe you are incorrect. DC/DC converter literally dumps power to the 12V + and - terminals of the battery. These same 12v battery + and - connections have cables to the cars chassis which then powers accessories.
  18. R

    A simple but practical and cheap EV range extender?

    That doesn't make sense to me, unless there is a bypass that allows power to flow from the DC/DC directly to the accessories and not through the battery. To give a simple example of why it doesn't make sense: If I were to take say a single 18650 battery and charge it at 1A @ 3.7VDC. If I draw...
  19. R

    Tool battery for extra range

    Regarding low voltage protection, that would only work on batteries where the power flows through mofets. What I'm seeing in many newer batteries is they don't send the power through mosfets (this increases resistance and voltage loss) but instead rely on the tool to sense when the battery is...
  20. R

    Finally, Your Next Car Could Be A 3D-Printed Electric Car

    70Kmph max speed. Couldn't take it on the highway. If it was highway legal and was $7500 it would be a free car for those in the US, because there is a $7500 federal rebate on Electric cars lol
  21. R

    A simple but practical and cheap EV range extender?

    I would have assumed that would be the case, but the article I read yesterday said the AC/heating system is powered by the 12v battery. Perhaps though it was just meaning fans and thermostat and LCD control panel etc. Are you just guessing or assuming or do you actual know that these cars use...
  22. R

    A simple but practical and cheap EV range extender?

    Why? The fans, lights, radio are all drawing power through the battery which is being charged by the DC to DC converter, the same way an ICE car battery is charged with an alternator?
  23. R

    A simple but practical and cheap EV range extender?

    5Kw could be ~500x 18650's which would be sub 25KG just for the cells or around 55lbs. I might try connecting my DC clamp meter to the 12V battery cable so I can see what kind of power that puppy is supplying with the AC and heat on etc. I believe the real killer of the battery is the liquid...
  24. R

    A simple but practical and cheap EV range extender?

    So all production EV's I'm aware of use a 12V flooded lead acid battery which is charged by a DC to DC converter off the main Li-ion pack. This 12v battery powers lights, fans, accessories, and other car electronics. Some articles I read suggested that it may even be powering the heating and...
  25. R

    17Ah GA pack shuts down after 2.5Ah

    Need more information. What is the BMS cutoff voltage? What temperature? What is your average current consumption?
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