Thank you. I can do the wiring and the battery holder fits for example halfords carrera holders and as long as I can see, many other batteries online are fitted same way. Just that the controller is in the battery holder itself... Was wondering if enyone could advice some model that has it integrated this way too..
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KT controllers that fit Hailong-type batteries are available from Topbikekit. It would probably be a good idea to go up to 48v if you're going to get a new battery. Greenlance and Yose both do good ones pretty cheap and fast. They do 20Ah 48v ones, which would give you all the range you want, so no need to carry a spare.
Alternatively, mount the controller in a controller box that you can also get from Topbikekit, or put it in a toolbag. I prefer the aluminium box controllers with block connectors because they're easier test if something doesn't work.
