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Email Fiido support. They're very helpful. Remember though they're in a totally different time-zone to us, so the reply will usually come when they're awake and you're still asleep.

I'm not sure if 19.2Ah is true either, but I did watch a couple of YT video reviews of this e-bike that seem to confirm it is 19.2Ah, and the Engwe website(s) do confirm it is too. What I think makes it believable is that the front battery-holding half of the main tube (from the folding hinge...

When choosing bear in mind how much slack/length is available in the cables and how the stem folds. A 2"/50mm rise works fine on my bike, but some of the higher rise bars I think might cause issues?

There're lots of examples on both YT and the Fiido Facebook group. You may need to use spacers or modify the support leg/bracket slightly to prevent fouling though.

There are lots to choose from that will fit - it's a standard diameter (25.4mm IIRC) at the stem clamp, the width and amount of rise there's a lot of choice. Everything from Brompton bars to BMX style will fit. I bought a Carbon Fibre 50mm rise x 580mm wide bar to save a little extra weight -...

I think your problem is more frame size rather than weight or range. Folding bikes by definition are most often "small" in size - at least when I tried a few before buying. I'm 5'10", weigh more than you, and my other normal/e-bikes are "L" not "XL" framed. I found "reach" on all the folders I...

Do you mean an EN compliance sticker? My D11 does have a CE sticker. As SF says, 36v 250w to show legal compliance is clearly printed directly on the motor (not a label). The thumb throttle is easily/simply unplugged if it worries you.

A few have commented on that. On my year old cadence sensor D11 it's implemented as a full throttle (which technically isn't legal here in the UK), but on the newer torque sensor D21 it's only implemented as walk assist (legal but limited as you've found). Fiido keep changing these things...

No. On PC, the Bafang Config Tool, later modified by Stefan Penov. Or the Speeed App on Android. You shouldn't need either just to change max speed (at least not with the bike shown in my avatar), which you can change from the handlebar display (Program menu - PS - 0512). My bike does use the...

As I understand it, regular capacitors present a higher resistance and low ESR caps present lower resistance. When measured, the 42v Sans charger reads 42v before the change, and 43+ a bit open voltage when the those output caps are changed. Ideally, yes, charging to 41v would IMHO be a better...

I'm a qualified - albeit retired - electrician. My 3 multimeters are all Fluke and all recently calibrated. I do understand your concerns. But in reality it's fine. 2 of my e-bike batteries are 2016/7, and still give a measured capacity (on a measured charge/discharge cycle) equal today to...

My own (very similar overall) hybrid e-bike uses an early version 36v M400 with the same control/display system. You can adjust the display to give (on my own bike) a max of up to 28mph assisted. Or use the freely available PC or Android app to change not only the max speed, but any other power...

Like MS, I've never been refused. Simply ask rather than assume it's okay, and always buy something... a meal, coffee and sandwich, beer... just something. Like motorists that stop at a pub or cafe just to take a leak and buy nothing... it really cheeses the owners off.

I think you're overthinking this. I routinely change the Sans output caps to Panasonic 63v Low ESR caps which are specifically designed for SM PS purpose. The cheap capacitors Sans fit are 50v rated and - lets be honest - total crap: In this application, they're hammered hard and will easily...

I'm always wary when putting (especially laying) my own folding ebike in the boot of my car because the motor cable can so easily be crushed or snagged, or the derailleur hanger bent (especially when driving and the bike could jiggle around a bit). You could maybe first check for wire damage...

It's interesting to hear what others are using. I admire @matthewslack innovate set-up where high generation, compactness & low weight, and conversion efficiency is important, but I don't think that's so important if you're basing your solar in a static garage/shed/house or mobile...

I used this one in my VW T5 for a while to charge e-bike batteries off the 100Ah starter battery. It's pure sine wave, better/kinder than modified square wave. It depends what fusing you have as to what you can draw off a 12v socket, but typical 10A fusing allows a 100w load which is enough for...

As Scorpio says, the "S" is used to identify models with gears, such as D2 or D2S. AFAICS I don't think there has ever been a D4 without gears though, it's always been a D4S with gears. Fiido changed the display on many of their bikes maybe a year ago now to include a USB port, but in the...

No I didn't, because if you're "connected" you're paying the standing charge anyway even if you use no electricity whatsoever. Prices vary markedly depending on where you are in the country, your supplier, and the tariff you've chosen. I just did a quick search, came up with this current table...

The one that always seems to appear at the National Camping and Caravan/Motorhome shows is the Raleigh Stow-e-way. They claim that has an all-up weight of 20kg and a range of 30 miles.