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Questions tagged [electric-power]

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5 votes
4 answers
5k views

Can I charge an ebike from another ebike battery?

I have a fiido d2s, and I love it. I'm not sure if I could upgrade to a bigger bike, because it fits so well in the back of my car and public transport. Anyway, it doesn't have a detachable/...
1 vote
3 answers
2k views

How much human-provided power is needed on an e-bike?

If we want to ride 50 miles (80 km) on a 35lb (15.9kg) Class 2 e-bike at an average speed of 20mph (32 km/h), how much power does the human need to provide if e-bike is on light-assist setting?
8 votes
3 answers
1k views

DIY system for charging battery packs from hub dynamo

recently I stumbled over an interesting feature of a bike. The gravel bike from Decathlon has an inbuilt USB hub where you can charge your battery packs while riding. Now I wonder if there is a way to ...
2 votes
3 answers
286 views

Why did the manufacturer fit a usb port on my e-bike battery when it is not connected?

I have a Viking gravity e-bike with an internal frame battery pack which has a usb port included. Thing is, I found out that it wasn't working even though its a brand new bicycle. So I investigated ...
4 votes
1 answer
141 views

What's the power supply for a Saris CycleOps PowerBeam Pro turbo trainer?

A friend is moving, and gave me his old turbo trainer. I've got the body assembly and a head unit, but he couldn't find the matching power supply. It has a standard 5.5mm barrel connector, but there'...
8 votes
8 answers
12k views

Can I use an RC motor to make my bike electric?

I would like to make my ebike to have the minimal look, so adding big hubs or mid drive motors isn't really an option since it also costs more. I found this Keda brushless outrunner 2000w 190KV motor ...
3 votes
2 answers
14k views

Ebike brake lever cutoff switch / interrupt switch : How does it work?

When pressing the brake lever on my ebike the bldc motor controller (aka ebike controller) 'cuts power' to the motor until the brake lever is released again/sensor is deactivated. I would love to know ...
4 votes
3 answers
3k views

Bicycle weight limit (carrying capacity) increase

I have a cheap 20" folding bicycle. Its specs say that the max rider weight is 105kg. The frame is steel (vaguely defined as "HiTen" steel). I want to convert it to electric, so will be ...
1 vote
0 answers
81 views

Are Magura HS33e levers compatible with HS22 brakes?

I plan to convert a bike with Magura HS22 hydraulic brakes to electric. Thus I would like to replace the brake lever by one having the controller output to stop the motor while braking. From my ...
2 votes
0 answers
1k views

Bosch eBike wiring diagram, where to find?

My RieseMüllerPackster80 refused to start today. I guess there is a bad connection somewhere but as all I could do was plugging the battery and computer in and out, I am not wiser whether cabling has ...
-1 votes
1 answer
134 views

Do gear train cogs exist (for driving a cog from a motor)?

Are there any gears made that can directly drive a cog? Specifically, there should be a rounded "flower" gear that could interface directly and reasonably efficiently to a bike cog. However, I ...
0 votes
1 answer
142 views

Dual electric/pedal bikes to solve pedalling effort issues

I prefer the good old pedal bike. For obvious reasons, I cannot get to the office sweating, and I have no time to shower before I get into the office. I have no issues biking uphill and steep road ...
2 votes
2 answers
953 views

"Right" way to store energy from 2 dynamo hubs

I just bought a recumbent trike, and plan to do a fair amount of long-distance traveling on it, to the point that a dynamo hub seems like a really good idea. I was going to put a dynamo hub on one ...
3 votes
1 answer
177 views

What is this ... electrical bike's setup? Is there a particular brand or model name for this? how to replace its battery?

Just bought it from someone, interested to get it fixed. he said it just needs to replace battery, I doubt it (after numerous experience with asking the sellers "what is wrong with the bike" and ends ...
10 votes
2 answers
2k views

Dynamo hub lighting system recommendation

I'm considering outfitting my hybrid/commuter bike with a front dynamo hub and associated lighting. Currently, looking at Sanyo, Shimano, and Schmidt dynamo hubs. The Schmidt's are pretty pricey, ...
22 votes
12 answers
8k views

How can I charge my phone while cycling?

I have an HTC Hero, which is a great phone, but the battery life is pretty poor if I'm using the GPS and music player on it as well. The phone uses a mini-USB connection for charging, and I have a ...
0 votes
0 answers
53 views

Fitting a CycloTricity E kit to a Sirrus Elite

The instructions are clear and accompanied by photographs of the procedures. However in attempting to fit the motor wheel into the forks of the Sirrus I find that the motor spindle is wider than the ...
1 vote
2 answers
2k views

tricycle engine compatibility?

Hi I was wondering if any bike engines would be compatible for a adults tricycle? An example of the bike I am talking about: TinyURL: http://tinyurl.com/otuo2d2 Thank You
2 votes
1 answer
2k views

How to securely connect cable to AXA Quattro dynamo?

See the image: How do I securely attach the cable to the dynamo? I tried the obvious, threaded the cable through one of the holes in the plastic cover, and pressed the cover snugly onto the socket. ...
2 votes
1 answer
341 views

Cheap energy sources for electronics during touring with low amount of sun energy?

My goal is to find a cheap energy sources for touring. I cannot use solar all the time so I am planning to get Reelights outlined here, for lights, because they are cheaper than installing a hub ...