Chris Abraham

I managed to take the controller out of it's hidy hole I believe it's a 36volt 18amp controller according to its number. Are there better controllers that are suited to use lithium more efficiently. Would anyone know how this one compares to up to date one's. I may end up renewing the controller throttle and power display, the battery display shows 3 bars to tell me the battery life and when the power kicks in.

Thanks for your help, tried the bike out today with lead acid to see if everything functioned, worked ok would certainly help if the bike was 3 batteries lighter, trying to work out the range and how long the batteries will last on a run.

Thanks for the info, I thought a conversion would be a bit of an issue, seems straightforward. So I will look for lithium ion, I see that you can get custom battery packs made to size so it can fit in my already existing battery pack, just need to find a recommended company that sells packs and chargers or if I were to make my own the parts. Would there be a difference in price with made up pack or home brew bearing in mind that the cost can mount up too with the extras and tooling to spot the tabs etc plus a bms. Anyone gone down this route from lead to lithium. I am sure it's a question e bike owners will need to find out when their battery life comes to an end and then find out the battery is worth more than they paid for the bike or the bike is now obsolete because the firm went bust or the model and battery is no longer made.

The eco bike, battery pack sits in the cross bar. A bit high up especially with heavy lead batteries but lighter lithium you can see why I want to change. The bike although it has a couple of rust marks on the chrome is hardly used as there is no wear on the tyre's. Any seen this type of bike or had one.

Hi Gaz

Is it that easy like changing batteries in a torch. What I want to do is keep the old casing which fits the frame and change the 3 x lead acid batteries inside which are 12 volts 12amps each total 36 volts. What I would like to do is swap and wire up the Same way the 3 batteries with lithium equivalents obviously with a new charger but that I don't think is going to be straightforward, I read somewhere that lithium gives out a slightly higher voltage and the amps are more efficient than that of a lead acid battery, I don't want to burn out the controller bearing in mind the e bike I bought is about 2003 not like the lithium made bikes of today but could be the same technology. I think the way to go would be lifepo4. My e bike seems to be made to good standard apparently these bike were issued to some police forces around the country back then who adopted the e bike concept. The bike is just called eco bike, I will post a picture and pick brains on the forum for peace of mind just to be sure.

I bought a fusion mountain bike light weight tangent frame, first thing I done was put a shimarno sealed bottom bracket on the bike had no problems since, just looked after it served me well could still go on for many years to come, touch wood.

Hi I am from Hampshire, been using the same mountain bike for over 25 years, thought I will give E bikes a try out, so bought an old model on eBay with lead acid batteries, hope I can get advice on the forum to change over to lithium, not sure if it will be easy but will wait and see.