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Very interesting. So that's 4 banks of 10 x 3.6V 2200mAh cells (nominal as opposed to "in use") making 316Wh versus claimed 288Wh. About 91% of calculation based on nominal cell capacities. I assume Kalkhoff uses 3000mAh rather than 2200mAh cells in 5 banks of 10 making the claimed 100% of...

OK so if I can get this straight then : 1) Your evidence of method of calculating capacity proves that Kalkhoff Impulse batteries are grossly and misleadingly overstated as to their capacities in use and this is not something Bosch, Panasonic or BionX follow suit with ? I think Kalkhoff ought...

God, keep your knickers on flecc. I'm simply pointing out with some conjecture that there are a whole host of things which might be inputting to some greater or lesser extent and making the point that no manufactururer's claims (or test results) can be taken too seriously. From what you've said...

Just thought about the similarity with 18650 Ultrafire vs Sanyo type battery debates (!) .... The 18 full power range you quoted really is very low especially for a bike with regen. Does make me think that perhaps the base cells aren't actually as good as in some other batteries (or perhaps...

^^ I guess someone would need to open up a Kalkhoff battery and a BionX battery and prove the cell capacity which would then give comparable results. You may get a better deal than implied in the BionX case for the reasons cited but the main underlying point about inadequacy of capacity is most...

Don't know about Oogoo - was referring to making a DIY mix and using it on my electrical circuits. For the sake of £1.50 worth of Sugru I wouldn't take the risk that's all ! Plus I've seen the cured results of Sugru and how strong it is and been convinced it's worth buying. But by all means use...

By calculation - if you have a 25A controller and a battery that's 36V nominal for example it would be 42 x 25 (42V when fully charged multiplied by 25 amps) = 1.05KW or 900W when at its nominal capacity. My guess is that if you have a 25A controller your bike will be quite capable of...

I'm not ignoring the facts of actual experience, flecc - I'm going by what you cited was actual experience and my own actual experience with a BMS battery... and a BMZ one. Well, contrary to what's implied on the BMS battery as 15A continuous rated it is quite capable of coping with max/min...

^^ flecc, I'm not looking at quoted ranges purely battery Wh capacities and extrapolating to CA-measured Wh/mile which I've seen the CST 500W hub motor consume used to its performance capabilities. what I think you're implying is that for example a 20Ah Chinese battery is a misrepresentation and...

I'd certainly never give you a slap in the face MS :p By the way .... Price questions aside, I didn't know they'd upped the capacity to that extent - 888Wh is much more sensible for a 37V bike. Quite the exception and very sensible to do that with the off-road button. Sounds like they know...

Is the high cost of replacement batteries basically at the heart of the desire to extend battery life ? Just interested because I think they're expensive enough to dissuade people from using the very thing they've bought as much as they otherwise might. On the motor noise is it really that...

It's not the bike or quality I'm having a bash at it's the battery capacity and the inevitable extrapolation of that to what the machine it's fitted to can deliver. It seems crazy that these high end manufacturers (apart from Kalkhoff on their non-Bosch offerings) insist on sticking to low...

I'm sure it is a good system else it wouldn't sell. However I think it's way overpriced. Having used a pretty powerful hub motor and a less powerful crank drive motor tuned up I realize now that for restricted bikes there's only so much the manufacturers can come up with in terms of both battery...

But set a 500W unit on max and I'd hazard a 9.5Ah battery won't last very long at all ... and that's the main point - its capacity is puny ! If you draw 30A+ it's going to go down fast and 9,5Ah is really small capacity. To me there's not much point in a spending thousands of pounds on a...

^^ That's one tiny front chainring !

No idea MS ... that's just the max I'd pay as any more would be a rip-off. Imho ! No idea whether you'd be able to get one either here or abroad for that .. would depend what battery you were trying to source and whether compatible with the relevant motor / controller you're trying to hook it up...

Mountainsport - I don't know about other consumers but the max I'd pay for a 15Ah battery is £499 and for that I'd want a high-end one. Completely frankly - I personally that's all they're worth and about double the cost of a 20Ah chinese battery that'll likely do most people 2+ years. Over a...

Serious ? :eek: ... that's such a rip-off it's hard to comprehend.

^^ that's called capitalizing on the downhills ! Using trails / canal paths might actually slow the journey down unless they knock miles off the total commute or cut out traffic lights etc....

I'd fit a kit to a regular Trek bike rather than buy one of their e-Bikes :). Don't know much about the hybrid bikes but their MTBs are great :cool:.