Recent content by Jason Morris

  1. Jason Morris

    Buying 18650 batteries from Taobao?

    I found theese...
  2. Jason Morris

    Solar controller who can charge lithium ?

    If you want to go the diy route: https://circuitmaker.com/Projects/Details/Craig-Peacock-4/LT8490-Buck-Boost-Multi-Chemistry-Battery-Charger-with-MPPT you can request the lt8490 ic for sample for free from analog devices.
  3. Jason Morris

    Buying 18650 batteries from Taobao?

    Hi. I've bought 18650 batteries from aliexpressbefore. I was wondering if anyone here has bought 18650 from Taobao as their prices are a lot cheaper. Although the cells are not "name brand" their seems to be good deals like 2600mah for $0.80 and 3000mah $1.25. These listings have many orders and...
  4. Jason Morris

    TI BQ769X0 Based Monitors - Project thread

    What about using a ltc3300 for balancing?
  5. Jason Morris

    30A pack build

    https://www.imrbatteries.com/samsung-40t-21700-4000mah-30a-battery/ -- 4s2p would be 8000mah 60amp discharge 544grams https://www.imrbatteries.com/samsung-30t-21700-3000mah-35a-battery/ cheaper option: https://www.imrbatteries.com/samsung-30t-21700-3000mah-35a-battery/ - 4s2p would be...
  6. Jason Morris

    LTO for SailBoat

    I saw some Toshiba 2.4V 20AH lto for $14 usd piece
  7. Jason Morris

    [DIY Project] Reverse Protected 18650 Lithium-Ion Charging Unit

    They are 50 cent each on aliexpress. I found that if you charge at two amps without a heatsink they overheat and die
  8. Jason Morris

    First harvest!

    Congratulations on your first time. I hope it was pleasurable.
  9. Jason Morris

    7s BMS

    https://www.aliexpress.com/item/7S-29-4V-8S-24V-Lifepo4-10S-36V-Li-ion-Bluetooth-Smart-BMS-with-30A-to/32840764349.html?spm=2114.search0104.3.3.40a23b03qyjA7x&ws_ab_test=searchweb0_0,searchweb201602_2_10152_10151_10065_10344_10130_10068_10324_10342_10547_10325_10343_10546_10340_10548_10341_315_10...
  10. Jason Morris

    What to do with 160x 20ah 3.2v Lipo pouch cells?

    you would probably want to spot weld them
  11. Jason Morris

    Headphone Recommendations

    theese are $50 and seems to have good reviews...
  12. Jason Morris

    LiFePo4 200aH spotted on eBay

    Yeah seems like a good deal. If assuming the batteries are at 90% capacity remaning. (Only 1 year old so they maybe better). It comes out to $125usd or 95 pounds per killowatt hour.
  13. Jason Morris

    Hardware for stand-alone solar lighting

    Well once the bms trips at 2.5v (underload) the battery voltage normally jumps back up to 3.2-3.5v
  14. Jason Morris

    Shrink wrap repair/replace

    If you don't mine cutting your own: https://www.aliexpress.com/item/5m-PVC-Heat-Shrink-Tubing-Tube-Wrap-Kit-For-18650-18500-Battery-Flat-Round-18-5mm/32838686288.html?spm=a2g0s.9042311.0.0.27424c4dL7PR7T 18650 shrink wrap cutting jig: https://www.thingiverse.com/thing:2954277
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