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Bafang have an option for a "push-button e-brake". http://em3ev.com/store/index.php?route=product/product&product_id=198 What exactly does it do? For mainly slow hill ascents, is it necessary?

Being that each add-e dremel is made individually by a lone Austrian watchmaker, there is a 4 month wait for delivery, so I am reluctant to put down 1100 pounds up front. They claim that the 600W version cannot be used with anything accept their original bottle battery, and acknowledge that...

It is claimed that: http://www.bikerumor.com/2015/05/14/the-add-e-electric-motor-kit-is-generating-watts-of-interest-on-indiegogo/ "The coating on the motor’s friction roller has been tested and will reliably help drive your tire in rainy, wet conditions." But a year since it came out and I...

For a 250W motor, would the extra amps from a 36V 15A battery gain any extra power and torque over a 10A battery? Or just extra range? For extra hill-climbing ability is the voltage the main determinant?

Although a roller's efficiency is less, its stealth value looks tremendous. The question is the e-add in its 600W version is enough?

If a 750W geared hub motor is used up a steep slope, is there any real difference whether it is on the front or rear wheel?

I live on a small mountain with lots of 100 metre-long 30 degree slopes, up and down. I do not require long range or high speed. I require 30 degree-slope climbing assistance, the ability to freewheel, and the ability to pedal with zero-drag and cogging, or to easily disconnect the motor from...

Someone else wrote: I have the bafang bbs02 and when powered off there is considerable drag making pedal riding difficult. I try not to run out of power before getting home because unless I'm less than 1/2 mile away I'll end up walking. This new friction drive disengages when you stop pedaling...

Can you confirm that. I was told by someone who has such a Bafang CD kit that although it can freewheel, it still drags considerably when pedalling when the power is switched off

Is the add-e the only way of electrifying a bike with the ability to totally disengage the motor from the wheel ie to cause zero cogging and drag if one wants to have the ability to pedal normally?

Have the pros and cons of this new "add-e" friction drive been determined yet? $1000 looks like a lot for what it is.

I don't have a bike yet, but what will be needed is greater slope-climbing ability rather than more speed. 250W just doesn't cut a 30 degree slope. Is it correct that provided one changes to the correct controller, most 36V 250W motors can be used with 48 volt batteries without burning out...

One option to increase the power of a little 250W e-bike is said to be to change its controller to a 'smart' one, thereby enabling access to the battery's 36V*11A full 350W power. Has anyone had any experience of this: does it work?