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That was my original plan, my wife had a knee replacement and I hoped she might benefit from some gentle exercise, but it didn't happen and after 4 or or more years the bike hasn't done 5 miles. Now I'm interested in popping up the battery and using it for trips were it can be put I the car to...

Its very interesting to get the opinion of someone who has actually taken this on, I am still in the research stage but your input interests me. I was wondering about buying a welder something like: Welder To upgrade the shopper bike using higher Amp hr cells , and which I may use to re cell...

The wholesale site is pretty interesting, starts to make the project more viable

decent cells are not cheap atm and in short supply. Thanks that's interesting, wonder if they will come back down as supplies pick up. Probably worth paying for quality cells if you are going to do it.

Thanks for the input, it doesn't seem to be cost effective to set up just to do one cell pack, but interesting nonetheless I wondered about buying a ready assembled pack like the ones on Ali express but don't know what quality cells they use, I've often wondered why someone who has invested in a...

I have been looking at videos of people spot welding packs of cells using pure nickel strip and it seems pretty logical (I worked in engineering) sometimes the efforts of people learning the process can be helpful as they don't usually assume people know things. I bought my wife a hopper...

That's good to know, I would be interested to know more about your repair and about the cells you found. Repairing a battery is something I'm curious about as it seems continuity of battery supply is poor, and as cells get better can we update tired batteries with better ones?

No problem, I didn't know the protocol on linking to products on this forum, and I haven't fully tested the battery yet , but I have a good feeling about it. Battery Hope it will help someone get more life from their bike.

Yes I think you are right, probably using both is the best way. I am looking forward to testing it to see how it compares to the original battery, it's quite a bit cheaper than the original, so I don't anticipate miracles, but let's hope for the best, I think the cells are getting better all the...

Haven't been on here for a while, but just wanted to report that I received a new battery today, I ordered it from Ali express it cost £183.41 with shipping . Tried it on my bike and it works but not done a full test yet, obviously I can't comment on the quality at this stage but at least I have...

Looking at that it seems pretty fair. My understanding was that the battery doesn't actually run all the way down, the internal protection shuts it down with some reserve, I did the last bit up and down my street and then put it on charge immediately, similarly when its charged I take it...

Yes last I saw advertised by Halfords was £400 but they dont even show that now,

I actually found my receipt for the bike last week, it was bought in July 2017 so assuming it was made first or send quarter 2017. Have not used it much and at the moment I am trying to deep cycle the battery by running it until it cuts out then charging to the max (usually indicates 99%) I get...

Thanks for your reply, I looked through the feedback for this vendor, and found one that mentioned the crossfire saying it works fine. I am trawling through the internet and get the impression that it should be ok. I also contacted the vendor and asked if they knew for sure, just waiting for a...

Hi I am on ,my second E bike the first was a Trek bought second hand, it was fine until the battery graduaiy started to fade and I checked the price of a replacement, ouch ! Decided to move on and aas I am not a heavy user chose the Carrera crossfire form halfords, its fine and good value for...

Seems to be a quantum leap in batteries, but does it need any special balance cuircit or could I just put them in my old battery pack? Would my old charger be happy charging them? I am not up to date on this kind of technology which seems to be moving on a pace. The link I posted above shows my...

Well in reality like most of the world's battery users I would like the highest capacity, mobile phones, laptops, eco cars, are all looking for the magic technology to make their own application more useable. Batteries like the Sanyo ones you quote seem to have a much higher capacity that the...

Did a bit of googling and it seems they have been around for a while, and have some positive comments. I would like to build the best battery possible but I understand that it's recommended to use the Sony US18650V3s in the Trek battery.

looking at re cell for my Trek bike and I found this site, just wondered if anyone has bought from them. Prices are low but they have been there for a while, which is positive. https://www.nkon.nl/sony-us18650v3.html

I did not know they were tied to the bike, do you know if they can be unlocked? I will re cell my own eventually but I wanted a practice run at this I understand the casing is a bit difficult to open. I looked all over to try and and find someone who would make up the cell packs but I found...