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  1. J_Mack58

    The joys of testing.

    3.46 volts full… l’m waiting on that last joker to start discharging them all at once.
  2. J_Mack58

    The joys of testing.

    You right Redpacket, looks like OPUS consider 3.47 and above “Full”. No need to pre-charge to 3.6volts. IR tests is fairly quick, do you believe the numbers? I read people writing about a 4 wire for a more accurate measurement.
  3. J_Mack58

    The joys of testing.

    You right Redpacket, looks like OPUS consider 3.47 and above “Full”. No need to pre-charge to 3.6volts. IR tests is fairly quick, do you believe the numbers? I read people writing about a 4 wire for a more accurate measurement.
  4. J_Mack58

    The joys of testing.

    Yep the cells are LiFePO4 cells, reclaimed. I agree with you I should test them all.... I just was hoping you would say something different. :cry:
  5. J_Mack58

    The joys of testing.

    I’m adding on or possibly replacing a nice 14s80p battery made with 18650’s cells. I never tested not one cell. Matter of fact up into last week I never owned a tester. Now I own two. With my limited experience I learned there are four type of bad cells. 1. Shorted or Heaters, they get hot when...
  6. J_Mack58

    Prototype: charge, discharge (16) 18650 or 26650 or mixed.

    I did not consider any other projects. the beauty of me learning is me messing up and doing things wrong. Plus my project is based on the parts I have collected to try to build this 16 cell beast. But your advice is welcome, matter of fact I got a question. I was planning on discharging the cell...
  7. J_Mack58

    Prototype: charge, discharge (16) 18650 or 26650 or mixed.

    Let me see how the circuitry and programming go then I will invest in copper. Wires were meant to be cut. :)
  8. J_Mack58

    Prototype: charge, discharge (16) 18650 or 26650 or mixed.

    It’s been in my mind for awhile charge, discharge, display capacity top balance and tackle internal resistance another day. I got Arduino programming down… Python on a Raspberry pie no problem. Allen Bradley Micologix PLC with panelview would be high end… I got the parts. Automation Direct...
  9. J_Mack58

    JAAAAAACKPOT !!!

    Thanks FloydR, got my OPUS and flipped the switch, now it’s testing time. Figured out how not “jack-up” the inner cell bays. Had these perfect 18650 size spacers so I rigged some conductors to each end that I will run to the 26650 cell holders whenever Amazon decides to drop them off.
  10. J_Mack58

    Ring cell harvest…. The Method

    Vice and Channel-loc pliers, twist 30 degrees CW and CCW. Two types of peanuts.
  11. J_Mack58

    JAAAAAACKPOT !!!

    Thanks Floyd. This is why I hang around this site, always something new to learn.
  12. J_Mack58

    JAAAAAACKPOT !!!

    Specs
  13. J_Mack58

    JAAAAAACKPOT !!!

    This Forum has helped me tremendously in gaining knowledge about cells, cell testing and BMS’s. This site also steered me to the Facebook DIY Powerwall group. Today I graduate from 18650 to 26650 as I have met my new best friend who can supply me used parking meter packs for free, well almost...
  14. J_Mack58

    The Bottom Line.

    Good morning Doc, There is a $9.00/month charge just for having utility wires going to my house. Then there is a whole host of taxes even if you don’t draw one mA of current so we will never be totally off grid. But cutting your monthly kWh use by more than half is a great thing. How many years...
  15. J_Mack58

    The Bottom Line.

    I-WOoooooooo! Get them Wolf. Looks like it was March this year you told them to take this bill and shove it. Good deal man.
  16. J_Mack58

    The Bottom Line.

    After all the talk of Cells, BMS's, Solar Panels and Inverters we all just want to land at a sweet spot. My household was once a >500kWh/month household. With no change in life style we down to 94kWh/month. With a few more cells (actually a lot more) I can get it lower and eventually become...
  17. J_Mack58

    DIY Spot welder with time control and specs.

    With the hundreds of YouTube videos about making a spot welder from old microwave transformers I made one. Months ago I had already cut the secondary off the microwave transformer and threaded one turn of welding cable in its place. And there it sat for months. Last Sunday I wanted to spot weld...
  18. J_Mack58

    Final score 192-8

    I bought 5 packs of the pictured packs from Battery Clearing House total 200 cells. After the haverst only 8 bad cells, 3 heaters, 4 super fast dischargers and 1 with the CID open. Voltage range of cells on delivery was 2.7 to 3.3 volts. I charge them all to 3.9 volts, thats the highest voltage...
  19. J_Mack58

    How to order from Battery Clearinghouse.com

    only my 3rd order of cells, I’m so lucky.
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