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As luck would happen another cell has now failed but this time in the other 6s1p pack. At least now I know how to replace it correctly :D I had noticed over the last few weeks that the voltage of this cell has been trailing slightly behind the others. It will be interesting to see how long the...

An interesting update that throws a little more light on the up and coming official electric assist Brompton. It was posted on the Yahoo Brompton Forum. Regards Jerry

Just for comparison I cycled my EBrompton into work today. Here it is shown folded and stowed in the same spot in my office :p Regards Jerry

Thanks Frank at first glance I thought you had found something, until you look more closely at the specs Maximal Continuous Discharge C-Rate: 0.8C(1.76Amps). Maximal Discharge C-Rate: 1C(2.2Amps). Even with the 180 watt Tonxin I pull continuous at 5amps and probably peak around 15amps! I...

I agree at face value Lipos look the better option. I have extensive experience with Lipos when I use to do a lot of RC flight. I know many DIY ebike enthuiasts use them successfully and are content. If used with caution I am sure they are fine. For me personally I want a battery I can just use...

There has been some question over whether they are genuine A123 cells. IMHO they are and even if not, their performance in the ebike application is excellent. Remember they are only 2.3Ah though, so not necessarilly the best choice for all ebike applications. However for longer journeys you can...

By chance my third pack turned up from HK today. Two 6s1p packs in the config I favour most. I have to say their pack config/welding service just gets better and better. The complete 2 * 6s1p packs work out at just over £60 incl p&p though you then have to add leads. I checked each cell...

Thanks for your comments. I have had the bike for nearly a year now and although I have used it quite a bit in the summer, having some lite assist will hopefully mean I can use it more often or work commutes in the winter weather. I also hate it when my EBrompton is down for maintenance and I...

Thanks :D On my EBrompton I actually went from a 3 Speed S/A hub option to the two speed derailleur gear option. This saved about 0.5kg. The Brompton TI with the derailleur gear option and a Tongxin would be around 12kg plus 3kg of luggage with controller/battery components. A truly ultra...

The donor bike It is a Moulton TSR 2. It has a Sturmey-Archer S2C, 2-speed, "kick back" hub which also has a back pedal brake incorporated into it. As the bike splits in the middle this helps as there are no cables running to the rear of the bike. This model also has a belt drive fitted...

Ok as promised here is a taster post of my latest project. I have ridden it on my work commute a couple of times now and here it is shown stowed in my work office :p Those are 20" wheels. More to follow .......... Regards Jerry

:eek: Lol Jerry

This is the battery My second ebike was an early S/H Cytronex, a great set up and I loved it. I found I got between 15-20 miles on one charge. These bikes are supposed to be pedalled a lot more though, which is probably why the battery lasts longer. Although I am sure the batteries do last...

Scott that was the new replacement cell that sort of recovered after the single charge, but still whimped out when I took the pack to full discharge. I must have damaged it when it went down to 0.5 volts when I put it in the pack without fully charging it. Now I have swapped it out again with a...

I get them from this ebay seller. He sells them individually or in packs made up with balance leads and power connector. If you do buy them individually, I strongly recommend you get them to weld/glue them up into the config you want as it saves loads of hassle and time doing it yourself. They...

Well although the cell seemed to have recovered (though never really took a full charge after I knackered it) I found that whenever the pack approached discharge, the suspect cell got hammered and its voltage went down to below 1 volt! I fully charged the pack and then took another new spare...

Looks like it is cheaper too. Schwalbe Plus's seem to have gone up and up, price wise. .. actually scrub that the contact plus's are about the same price maybe even more! Regards Jerry

Yep I fitted a spare pair of those on my daughters DIY E bike I made for her. As you state they need plenty of mud guard clearance. Regards Jerry

Interestingly I was committed to Marathon Plus when I first converted my Brompton for fear of punctures and the added complications for fixing them that ebikes throw into the mix. However at the beginning of the summer I tried some Kojak tyres on one of my regular small wheeled bikes and was...

I am content to ride at 15mph assisted though my latest creation seems to cruise at about 16-17mph :o I commute through pretty flat Cambridge city center so don't want to be a danger to pedestrians by cycling faster and don't need the power for steep hills. I also want to get the most out of my...