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  1. J

    Charging LiFe battery with Buck boost converter CC

    Thanks for the reply! Thats great. I'll just charge it with my current system. It hasn't given me any issue so far in terms of damaging Li-ion's Got it free from a customer of mine, really nice guy. And yeah I've never had a battery of such capacity. Its great to be able to just head out and...
  2. J

    Charging LiFe battery with Buck boost converter CC

    I recently came across a fully functional 16s 18ah LiFePo4 battery for free! Big score. I am very unfamiliar with the this battery and its differences to standard Li-ion batteries. I was looking into how to charge them and saw apparently you need a 2 stage charging process with a CC and a CV...
  3. J

    Largest genuine capacity LiFePo4 Cells

    I'm looking to build a LiFePo4 battery pack but am unsure on what are real capacities. I see listing on Ali-express for 12.8ah 32700 cells and am unsure if this capacity is real. Of course with Li-ion's I know that the 900000mah batteries are fake but I heard LiFePo4 has a higher capacity per...
  4. J

    Add cheap current limiter to Ebike

    thanks but I forgot to mention I'm both trying to do this on a budget / with parts already on hand and also looking for oddly enough the less simple solution as it lets me tinker
  5. J

    Add cheap current limiter to Ebike

    I'm building up an e-bike based on an SW900 display, generic cheap Chinese controller and a 350w 36v motor overvolted to 48v. In my various dealings with this controller/display I have fried the headlight transistor and I think either I have broken the current limiting of the controller or it...
  6. J

    Help making cheap ebike controller fucntion

    I was digging through my shed and found this ebike controller. It most likely works I just cant find the "lock" wires to short. I know where the brake, motor phase, hall and throttle wires are I just cant work out what wires to short to get the motor to spin. There is full battery voltage (and...
  7. J

    DIY midrive conversion. Looking for low power suitable RC motor and general advice!

    I have plenty of experience with hub motors, but I'm keen to try the midrive variety of ebikes, I don't really want to use a kit so I jumped on the using an RC motor and putting it into the bike gears idea. I'm going to do two stages of gearing down from the motor. one on the left of the bike at...
  8. J

    Cheap spot welder or DIY CD welder?

    I'm looking at getting a spot welder and need it to work fairly consistently (nothing insane) for building e-bike battery pack. Should I get a cheap Chinese spot welder like the Sunkko 709AD or just build a CD spot welder. I can afford the $300ish for the chinese one but the cheaper the better...
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