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There's a small bulge in the third photo showing dimensions but definitely inspect the pack on arrival regardless of what the advert says.

When batteries with different types, capacities or condition (age etc.) are paralleled, even at the same voltage, there can be substantial cross-current between them during use, which detracts from their performance / adds to their stress (ageing or failure rate). They need a dual battery...

Kit 'conversions' make up 46% and the rest could be either. They're improving the reporting form which means figures aren't directly comparable between years. The link was the coloured bit in the footnote. e-bike – conversion 74 e-bike – unknown build 58 e-bike – manufactured 29 Is...

Alex and Bill buy new stems and being an engineer Bill lightens his. After a couple of months of daily rides Bill's twin Ben is convinced and buys the same stem and does the identical mod. Another two months go by and Ben face plants when his stem snaps only to be told "You must have screwed...

No panic here, you've the experience to tell when the cells have more to give, to arrive at a fine bike and write a really interesting thread. Suppose I click my 52V battery into my 36V bike, the display may not survive (see IEC 60384). In dissipation terms running at 15A instead of 8A is like...

With rain trousers swallow your pride, hitch up the crotch and raise a knee to keep it in place, then you can have two hands on the brakes while doing what saneagle said. If you're used to leaning on the (braked) bike and ending astride the crossbar (not the saddle) it's easier.

For anyone landing on this thread without seeing the original a word about the controller swap, especially as I plan on one myself. The new controller at 12A increases the torque over the old one and doubles the heating effect. The OP used calculations, heuristics and a wealth of experience to...

Just to back up the advice above, your pack measured 41.2V (in post #8) and cut out at 38V (post #10), a drop of around 0.32V per cell. The weak P-group started at 3.4V (post #8) and would have reached around 3.1V off-load when it cut out, so the BMS did its job there. Let the battery settle...

The Bill would impose several actions within 6 months on the Secretary of State, I fear they'd have to rush something out to fend off media claims of inaction. c) Police the laws around tampering with and stealing from vehicles, to include ebikes, to facilitate charging in spaces like back...

How can I put it more clearly? The fire rate in new stock is reducing naturally, old stock in circulation will continue to make headlines, the Bill will only affect new stock. Does this build confidence? It's not even safety by Whack-a-Mole, what about when we all realise current dangers have...

A direct parallel is happening now, under our gaze, with Lord Redesdale's Lithium-ion Battery Safety Bill. The Bill's on its way through the Lords and seeks to regulate ebikes, kits, batteries and chargers. The similarity to large-scale testing is the clause forbidding sale of an ebike unless...

Cheap galv spokes turn patchy grey and nobody minds. ICBW but at this rate it looks as though corrosion both outside and inside could make these hard to adjust, I'd definitely show them to Wisper. (Our posts crossed)

I have a Gran Camino. - What should I ask the seller before going to look at it? Mostly, how soon can you pick it up. It's total overkill for your purpose, which is fine because there's every chance you'll be using any ebike way more than expected and this one's well up to that. - What should...

Not suggesting for a minute that you'd advise amiss. Just trying to point to how electrically modifying a bike can need skills on a different level to buying a kit or doing the sums to build from parts. Real world experience shows there's a lot of headroom in many of these products in normal...

As the Battery Fires thread flickers on I just want to put this out there for others who may not have Saneagle's experience, estimation skills, stepwise approach, knowledge of what to look out for etc. Disposing of heat can be a pain with electronics. If you reduce the resistance of the shunt...

The capacitors in the controller and the inductors (phase windings) in the motor act together to some extent like a buck converter so both ways of seeing it are useful, especially 'average' voltage and current. In a basic hub motor system as the bike slows the back EMF from the motor falls, so...

That sounds like a potential gain - if LFP fires don't develop as fast (through needing air) that would be some improvement. I don't know if they're right but a couple of places say LFP don't catch fire on impact/puncture or shorting. I didn't find anything about other causes nor about LFP...

There's a strong lobby pushing for regulation that would mean reconditioned batteries couldn't be sold, and perhaps not used, so you'd have difficulty charging for this service. Also a bike battery fire is often very quick to develop and intense. For working with batteries ideally you need...

If it fails through reasonable consumer misuse I think of a battery as poorly built, as in the case of falling from hand height, overcharging or an incorrect charger. Would the bodies working on regulation be open to viewing it this way? It would make for easier and safer solutions.

Is this right? "If all Li-ion were replaced with LiFePO4 ebike fires would cease." Figures here suggest that the space for a 500Wh Li-ion battery would hold about 450Wh of LiFePO4.