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The general rule used to be you can get away with 44.4v on a 36v controller. But you are using at the edge or max of design specs. Usually I found the controller to be weakest link. You will push motors, contollers and maybe batteries to their limits or beyond. I blew many bms, contollers and...

Being a somewhat early adopter of all forms of electric personal transport, I bought a SLA powered scooter (chain driven and weighed about 48tons) when I was 20 and living on brick Lane just outside the City of London (I'm 45 now) I made it about 50 yards into the City on a Sunday morning...

Ove seen these and similar but I do worry they can't handle th amps we need. I've never tested or used them though. I like me soldering iron! Maybe others do have experience?

Tiny packs that can deliver the current needed will be expensive , especially at 1s over 2s (13cell vs 26cell). Nealh recently gave my some great info on cells on a thread . I'll try to link it

May I ask how you have connected the power to a motor without a controller ? Are there simply two wires exiting the motor. I just googled harbin and it seems to be Chinese brand

To the OP You can legally have a throttle as per whisper and woosh. You can also have one on a conversion as long as you stick to the other rules (250w, 15.5mph limit). This is not quite as 100% whitwr than white as the whisper /woosh solutions. However, althiugh the law might be said to be...

Agree with that, can't see how much can be done. Though rise of deliverroo and others predated the scooters. In cities and towns there are rows of 1000w conversions with dual/triple batteries strapped to low quality bikes used by delivery guys. In London yesterday I saw two bikes in the heart of...

Thanks Neal, off i go searching armed with your knowledge

Thanks again Neal, one question for you is do you have any knowledge of the tesla 4800mah 21700 cell? I found a supplier for 19.2ah 36v packs using these cells at a reasonable price in the slimmer HL 1 casing

Thanks Neal , I'd prefer not to have to build myself so ill have a look around for a prebuilt with those cells options and perhaps email.jimmy too. I don't need more than 15ah /17ah really. I run my bbs at 21a rather than 24a

Very glad to hear from you but sorry to hear of your wife's family and gran. I wish you and her the best, it can be really tough at times. Twins are now 6 and eldest are 13 and 10 respectively. So we are coming out the other side ! I think I dropped out as they hit 18m/2

Hey Neal ! Great to hear from you and the reply just goes to show how out of date I am! Never heard of most of that lot and the appearance of 21700 format in ebikes was for outlier homebuilds previously Though I wonder how they fit into hailong cases or are there new 21700 specific cases...

That's for clarifying! , apologies for my poor recall !

Good afternoon I've been a long while off the forum for a number of reasons and find myself a little disconnected from the latest in battery tech and suppliers My 4 year old 36v pack made of LG mj1 cells is way past its best and nearing retirement. It used to be pretty much buy new from...

Hi Neal and all ! Glad to see the forum is still frequented and a font of knowledge. My interest in ebikes absolutely remains and is my primary form of transport as well as leisure uses. However, the four kids ,new jobs and needs of ageing parents and in laws have left me needing 9 days in...

I just fixed one of these, parts are easily available and repairable as vfr400

How does one charge it when in deep outback where such a thing might be needed. What range amphibious? (measured in metres rather than km maybe?) Plus how to launch the thing. Never just the t water that's the issue, you need a launch site to* *though as autocorrect just would not let me...

A solution to a problem no one has!

They are awful! The only issue with an arm is in the dark. Decent reflective material on arms or gloves is better than any indicator imho