I thought i just thought i'd share an idea with regards to batteries.
If you want a 36 volt battery for an ebike your looking at around £400 give or take for a good quality lithium-ion which is beyond allot of peoples price range,
what if i told you you can make a 36 volt lithium ion battery safely with 6ah for £130 without having to solder without having to strip old batteries out of laptops and very little work?
6 ah doesn't sound like much but it will get you around 9 miles with a power assisted lekky bike and given the price you can make it for you could make two batteries and extend your range to 18 miles for still less money than a genuine bike battery and they don't do much more mileage.
ultimately it's up to you how you want to do it but i will explain the pluses of my way of doing it which to me are entirely practical .
right here goes:
you can buy 18volt lithium ion drill batteries on some buying sites for as little as £35 just look around they do exist
you can wire these together easily with with spade connectors very cheap ...pennies
you need four batteries to make this work, for the record though you can pick batteries up at bootsales too just bear in mind the batteries you use must be the same power and tech i.e all lithium ion....or all ni-cad etc or indeed if you wanna go super cheap but mega inefficient lead acid.
step one: take two 18 volt 3ah drill batteries and wire them in series, this is simple but just in case it gets misunderstood i will suggest you look at youtube to find out how to wire in series to save me getting shouted at lol.
step two: repeat the above with the second two , this will give you two seperate banks of batteries still individually 18volt but both with now a higher rated amp rating of 6ah.
step three: take the two pairs of battery banks you have just created and wire them together in series again get yourself on youtube to learn how to do this it really is simple.
This will now give you a battery pack rated 36volt and 6 ah, obviously if you want to increase the amp hour rating you need to add batteries whilst in the series configuration but you need to keep the configuration equal.
the reason i think this is a good idea is few things, one its possible to make your own bike battery thats just s good as any commercially available one at less cost but also you can spread the cost by buying the individual batteries one by one,
multi sequential chargers are available at around £70 quid but individual chargers are allot less,
but heres the really good bit if you do it , theres two or three good points, one cheaper, two you can still use the individual batteries for you power tools, three because you are not disassembling the individual battery units as long as you dont tell the manufacturer what your using them for you do not compromise the makers warranty if bought new.
anywho any questions please feel free to message me, i am only just getting back on my feet after being homeless so as yet unable to upload diagrams and do videos, but as soon as i am i will be uploading some stuff detailing builds and sharing as much of my limited but useful knowledge as i can...peace and love people i hope the above helps someone.