Recent content by Ajax

What about banning mobile phones or laptops? After all, they have the same battery technology, with the same potential if misused.

Just a thought, but apparently, because we still don't know for sure, the first sign of a battery fire is these things starting to overheat. So what about a heat sensor [or semi-official sticker] on the sides of these batteries that either changes color or sounds a piezo buzzer? This way if you...

Great thread, but it seems to me there should be several categories of e-bike/ battery fires. As well as the types of fires there should already be advice on how to best avoid, or even on what to do if a fire starts, besides run. Are there extinguishers that will contain a battery fire...

You might want to get an "ebike tester". You can use this to test the phase and hall wire going to the motor, as well as the phase and hall wires coming from the controller. If you've replaced the controller, some controllers need you to calibrate the wheel by connecting a 'test wire', which you...

The jubilee clip is certainly the weakest point of this design. All that potential load on that thin sheet metal, not to mention its screw mechanism where the quality can vary. Those things also rust when left out. It seems wise to have a back up. If you are using this design then grease it and...

Thank you for the recommendation i've just ordered it. The disc brake side is also the cable side from my hub. This should be interesting. I like the fact the sprocket comes out allowing you to get that ideal fit to the axel. Edit: I just realized the link above is for a 12mm x 10mm axle...

Both bikes were proprietary, but then the motor on one froze one winter and had to be replaced with whatever i could afford. Later i had to replace the bike frame and rebuild the bike when the bottom bracket failed and could not be repaired. The other day after lengthy repairs, the rear hub...

I wonder how many of these fires are caused by folks finding a 2nd hand ebike and then sourcing their own batteries, or having the battery but sourcing their own chargers? eg charging a 36v battery with a 48v charger? If you are buying a battery make sure its supplied with its dedicated...

Here's the thing: If your motor breaks or you need a new controller, you either pay way over the odds for 250W or buy the cheaper motors/controllers that go well above 250W. The market and law are at odds.

The two e-bikes i own never featured Torque arms. Maybe the dropouts were stronger. I think I need a pair now, but I can only find one design. Is there a UK source for decent torque arms? I found this site showing a range of torque arm designs. I can only find their V1...

Last word on these budget controllers. I got it to work. The only thing i really needed to do was connect the 'door wire' to the battery/alarm positive, eg enable the controller via the throttle key switch. I used the alarm power to power the lights via a 12v 3mp step-down transformer. The odd...

OK, for anyone on the same quest, I just found out that the Yellow is a signal ground, the Blue is a signal wire 5v, and the Red carries the battery's positive voltage. If the yellow and blue are shorted, the bike is locked, e.g., the throttle won't work. This means that if you aren't using...

Thanks The controller has a wire-labeled door which i have connected to the key switch, i just wondered about the 3 wires for the alarm, and if I needed to connect one of those to the battery positive. They are, orange, yellow and blue,

Hi all. I picked up a budget controller off Amazon and then a virtually identical controller on eBay. I have identified most of the wiring. Both controllers have dedicated power and connection wiring for an alarm. My question is this, will i have to short the connection to the alarm to get it...

I also read this on the bbc site . The assumption here is that e-bikes are like cars, and stored with their batteries. We all know that most e-bikes have detachable batteries which would be taken indoors to charge.