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  1. Z

    Li Time mini LiFePO4 battery made with pouch cells. Charging? Voltage measurement?

    I am thinking about getting a LiFePO4 battery from a company called Li Time (I think it used to be called ampere time). The specific battery is the 12.8 V, 100 Ah, 1280 Wh mini. It’s a bit smaller than their regular battery of the same capacity, and it’s made with pouch cells. Does anyone have...
  2. Z

    Charging a Li battery from a 4Runner alternator.

    I do a lot of camping and biking from a 2008 4Runner. Unless I can find 110 volt power somewhere, it is hard to keep bike batteries charged. I was thinking of getting a 12 or 24 volt Li battery with a capacity around 1300 to 2000 Watt-hours that I can charge from the 4Runner alternator through a...
  3. Z

    Baserunner controller inside a downtube mount: heat generation and other issues?

    I have a Baserunner (aka Phaserunner) controller mounted inside a Hailong 01 downtube mount. I am using that with 36 volt battery to power a Bafang G311 motor. Since I have moved the Baserunner controller inside the battery mount, I find that the controller stops working briefly fairly...
  4. Z

    Using 3 LIGO batteries to power a 24 volt converter

    I have 3 LIGO batteries from Grin that I haven't been using very much recently. In series, as you all know, they make a nominal 110 volt dc source. I would like to ask if I can use that as the power source for a 24 volt converter which normally plugs into a 110 AC wall outlet? I already have an...
  5. Z

    40 amp fuse question; blade vs bolt down

    I am working on a project where an inverter draws about 25 amps* continuously from a 13 volt battery-based source. I am using 10 AWG wire with 30 amp blade fuses in in-line fuse holders on the 13 volt wires. (Something I got on Amazon that happened to have the connectors I wanted on both ends...
  6. Z

    Bafang G310 losing power with time?

    I use a Bafang G310 with a Baserunner controller and a 36 volt battery on a mountain bike. I have been doing a sort of regular commute with that for about 3 years, and I have noticed recently that I seem to be getting a bit less torque (maybe around 10% or 15% less) than I used to for the same...
  7. Z

    Hailong Battery cradle mounting, is it okay to file off a small stand-off?

    I am mounting a Hailong battery (cradle) (H01) on the downtime of an aluminum frame bike. There are three bottle-holder-mount threaded holes with stand-offs (raised area). I can use the upper two to mount the cradle, but then the third one kind of pushes the lower part of the cradle and causes...
  8. Z

    Charging a portable power station from a Tesla Model 3

    Portable power stations such as the Jackery E1500, Ecoflow Delta or Goal Zero Yeti typically charge at about 100 watts using a 12 volt source and up to about 500 Watts using a converter powered by 110 volts AC. I am trying to figure out how to charge at the higher rate from a 12 volt DC power. I...
  9. Z

    What connector is this on a common bottle-shape battery?

    This connector connects to the top of a 4P10S bottle-shaped battery I inherited. 2 pins wire to black and 2 pins are wired to red. Does anyone know what type of connector this is? I am thinking maybe a GX16-4? or maybe GX20-4? I have Andersons at the other end so there is no issue with wiring...
  10. Z

    Cutest little hub motor on the planet?: what happened to the Bafang G370?

    Around a year or two ago the very small Bafang G370 was dubbed possibly the cutest little hub motor around, and projected to be very popular amongst those who love very small lightweight motors. There was every reason to be optimistic. The slightly larger and heavier G310/311 was a quiet...
  11. Z

    jst-sm crimping: controlling depth of insertion

    I have been making some jst-sm connectors, mostly with male pins, and I kind of thought that with experience I would get better and better at that. I am finding that I still have a lot of trouble getting consistent depth of insertion. I have a good crimping tool that I bought from Grin. I strip...
  12. Z

    Dielectric Grease: how to apply it.

    I know this is not a novel topic and I have done some searching and reading*, but I feel like I am still not crispy clear on the best way to apply dielectric grease on different connectors. For example, for a Z9 Higo over-molded connector, on the male part there are 9 pins, each with about...
  13. Z

    Phase lag, power factor and efficiency in a Bafang G310 / Baserunner system.

    I have been trying to develop a practical, empirical understanding of power flow and phase current in an e-bike system and I'm thinking that maybe understanding two particular scenarios could be a good start. For specificity, let’s say we have a Bafang G310 motor (standard winding) controlled by...
  14. Z

    Splicing an 8 conductor motor wire: how to make an elegant slender splice?

    The wire going from my controller (Baserunner) to my motor (Bafang G3x), is a 9 conductor wire ending in a Z9 molded Higo connector. Due to the very close proximity of the Baserunner to the motor in my set-up I have a lot of excess wire length and, even though I like the Higo connectors, I think...
  15. Z

    Attaching resistor to ABS plastic project box.

    I have a 1/4 watt resistor floating along the inside of a ABS plastic project box and I was wondering what is a good way to maybe attach that to the side so it doesn't move around too much. The project is an e-bike throttle. I hoping to find something simple. Things I have around include DAP...
  16. Z

    Baserunner on off switch issues. (Phaserunner)

    My recently purchased BaseRunner has a 8 pin molded connector which connects to a small adapter that bifurcates to 6-pin and a 1-pin JST-sm type connectors. When that adapter is plugged into the molded Higo 8-pin, the BaseRunner turns on; when the small adapter cable is not plugged in the...
  17. Z

    Voltage divider throttle for auto cruise: a specific design.

    I am planning to make a new voltage divider throttle to use for cruising on flat terrain, and I thought I would share the design here and see if anyone has any interest, comments or ideas. Essentially it uses a chain of resistors and pots, with a signal voltage coming off between the 1k resistor...
  18. Z

    Two throttles in parallel?

    With a Baserunner or a regular Grinfineon controller, I am planning to set something up with two throttle choices. One would be a regular linear Hall effect throttle and the other a "cruise control" voltage divider throttle which is homemade using resistors, indented pots, etc. I am thinking...
  19. Z

    Parallel series battery architecture

    A Ligo battery is, as I understand it, a 36 volt battery made from 10 cells in series. That is, a 10 x 1. If you put four of them in parallel, then you can make essentially a 10 x 4 battery. That 10 x 4 battery which consist of 4 individual chains working together in parallel. On the other...
  20. Z

    Using 3 LiGo batteries to charge a computer.

    I was thinking of using 3 LiGo batteries in series to charge a laptop computer. Making an Anderson to 110 volt (female) adapter and then plugging my MacBook charger into that. Does that sound safe? Will it work okay? Have you guys done that. (Ligo is a 36 volt 98 watt-hour Li-ion battering from...
  21. Z

    Controller to motor connectors to allow frequent disconnection.

    I have a small motor with a HIGO Z910 connector** which I plan to use with a controller in a backpack so that I would be disconnecting the controller from the motor every time I leave the bike. I think the Z910 is not a good connector to use for frequent and fast connection/disconnection, and I...
  22. Z

    Batteries involving 40T, 30Q and MJ1 cells. Preferences and opinions.

    I have been reading a number of great posts here on batteries, including “Li-ion cells ageing”, and I would like to ask a question pertaining to some specific cells and configurations. This involves some small, 200 Wh batteries, but you can easily scale it up to larger sizes by imagining...
  23. Z

    a company called "Full Battery"

    Has anyone purchased a battery from a company called "Full Battery". https://fullbattery.com/ They seem to have some very simple, light-weight 36 volt 10s2p batteries made with 18650 cells. Is this company legit? The products look reasonable, but I have never seen even one review of them. Thanks.
  24. Z

    Using Ligos in parallel

    I have two Ligo batteries that I would like to use in parallel from now on. Currently one is charged to about 40.7 volts and the other is about 39.8 volts. Can I just connect them and use them as is, or do I need to make the SoC more similar first? PS. I apologize for elementary nature of this...
  25. Z

    Switchable voltage divider instead of throttle.

    For a sort of stealthy, discrete project, I am thinking I would like to use a switchable voltage divider in place of a throttle. Something where I could switch through 4 or 5 levels of assist using a small solid state voltage divider connected to the motor controller via the three throttle...
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