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Well, I'm the one who started this thread: both my bike and my self-made extender are live and kicking well.

Thanks for documenting and testing and taking photos. This really shows that there are alternatives to the commercial stuff (y)

How would you plug the BMS for charging? You should have some different connector with... umm... 11 pins at least.

Lithium batteries actually like to be stored in cool/cold. You of course don't get a full power out from a cold li-battery, but storing is different. They do warm up, when you start using them (due to internal resistance), but to get the best output and capacity from them, they should be warmed...

...big of a deal to run a separate charging wires out from the frame (same hole where e.g. rear brake cable goes in) and then charge through those. *** What comes to my original extender... Because winter and darkness is coming, I bought a 42V DC to 12V DC regulator; I plan to install a car...

I used a powerful Weller solder iron and nickel strips. Yes, the cell heats up a bit when doing it this way, but I wouldn't worry too much. I also used plastic spacers, but in your case I would try to put the cells in a tight package to minimize the need for space. Solder and nickel strips will...

Which cells do you plan to use? 18650 or 21700? If the latter fit, they'd give a bit more capacity.

Like you said, in that scenario the motor doesn't do anything because the main battery is off. I assume there's some communication required between the motor and the battery and if that doesn't happen, the voltage from the extender is not enough to do anything. I've had many times the main...

Sorry, I actually have 10.22.3. I got confused with "3". These are the settings, which work again after re-installing the app, but which went crazy after enabling Smart HR.

... I removed and re-installed the app and got it to work again with my old settings. I'm sure that enabling Smart HR did something, which I wasn't able to revert again.

I've tried to get my head around with Current Motor and Assistance etc. values. I've been lately really happy with my setup, as I was getting a good range and also a good exercise (i.e. the uphills haven't been too easy, but the bike has assisted just the right amount), but here comes today: I...

...don't need the power anymore. Trail is for steeper and/or more technical uphills and Turbo for going over logs or other short technical sections. *** I do have one wish though: I have "Duration" visible in my 3+3+3 horizontal dashboard, but the moment, when duration goes over 1 hour, the...

...for longer sections of normal trail Trail: longer uphill sections, or even technical parts, or mud etc. Turbo: Give me everything you got -mode *** And yes, now when I know the reason for the delay, I will so more testingto find out, if I find some way how I could ensure that a change would...

Thanks for the explanation Paolo. Would it be possible to program a selectable option, which would do this: If rider is pedaling, but stops pedaling suddenly, BLevo would not do any Smart power changes for like 2 secs. It would kind of work like a clutch in a car with manual transmission; it...

One thing still: I don't know, if this might have an impact on registering the assistance level changes when using BLevo, but my iPhone is 8+, so quite a decent amount of processing power, but the Android phone that I used was LG G2, so already an old-ish model. I did not however have any other...

Others have been commenting the same and I do it as well: I'm planning to make a switch from iPhone to Android and I already purchased BLevo for my Android phone. I was happy to see that Android version has much more things to tinker with, but I was disappointed about the lagginess of assistance...

One way or another they avoid current between the batteries. I’m not going to ask from them directly, but to my understanding Italian Levorex and Belgian Levo range extender use ideal diodes and British Trailwatts some custom solution (which in the end might be exactly the same principle as...

If I'd have a chance of OEM 700 Wh battery (which I don't with my 2018 model bike) or to save few hundred £ and build a range extender, for sure I'd also take the OEM battery. I'd probably then sell the 500 Wh battery and be then close to break-even. One needs to remember that while OEM...

We are having a transition period from winter over here in Finland and I haven't ridden the bike properly since I got the DIY range extender done, but finally took a proper test ride yesterday. Actually to test the diodes and their heat management. Bike was de-restricted by BLevo, so I ended up...

Yeah, so let's say it once more (and I probably should've been more accurate in my previous message): if all is good in the battery and the BMS works as it should work, it's not a problem (for the battery itself) to leave the it in charger for longer periods of time (ok, then we start to talk...