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The 15 amps is the current from the battery, not the curent that goes to the motor. You are therefore taking 15 x 36 = 540w from the battery. That energy/power is then converted into motive power by the motor minus a small switching loss in the controller, which is converted to heat. The motor...

It's an Izip CB26. the Specialized stickers were probably bought from Ebay. https://www.amazon.co.uk/PEGATINAS-STICKERS-S-WORKS-AUFKLEBER-AUTOCOLLANTS/dp/B014X39T9M

Use the 200k scale and try again.

What operates the back brake?

36v batteries charge to 42v, so 36v and 42v is the same thing. A 36v battery charger is 42v.

You have to remove it completely. it looks identical to the one I linked above, which is a sealed unit with nothing to adjust. You just replace the whole unit. Is that whole arrangement on the chainwheel some sort of torque sensor or is it for a back-pedal brake?

Are you saying that you only get 17 miles with each batteries on that bike, and when you put each one on the other bike, you get full range? if so, did the bike ride without any noticeable problems or was there something obviously wrong?

The lights wouldn't normally have any effect unless they've done something stupid and shorted something. Step 1. Remove the battery, fully charge it and measure the voltage on the terminals at the bottom of the battery. It should be 29.4v hot off the charger. Any lower than 29v probably...

You can buy good cell packs for about £150. Less if it's 24v. https://www.ebay.co.uk/itm/36v-battery-Lithium-Ebike-42v-10ah-Ebike-Samsung-Lg-LI-ion-and-charger-good-bms/373489040529?hash=item56f5ae7c91:g:nXQAAOSwaRhgQQNa

Some of what you say doesn't make sense. " I was thinking of a front hub motor because it's lighter". Lighter than what? You get big, medium and small sized motors that can be fitted in the front, rear or middle of the bike. Some rear motors are smaller and lighter than the VeKKit one. Small...

On the same bike and ride, petite Women can get double the range of a some of our forum members who have eaten too many pies. Mass has a big effect on range, especially if there are hills in your ride. 50 miles from a 36v 10Ah battery is quite feasible for a sub 75kg rider, especially if the...

General advice is not to leave it for too long fully charged or completely empty.

yes, you can use any battery of the same nominal voltage connected to those two pins/wires. if your battery is knackered, you might be able to buy a standard replacement cell-pack, that fits inside the case. You have to check the dimensions of the space inside the case to see which one/s might fit.

This is the manual for the first version Crossfire. if it's not the right one, show a photo of your control panel.

I've had that same fault on two different bikes. One was on the first type of cylindrical bottle batteries, wgere it was the nut on the back of one of the sprung pins that hadn't been tightened before adding the glue, and the other was on an early Oxygen with the plastic battery, where it was...

OK, the red light means that the voltage is reaching the throttle, but it's too low. You need the meter to check your battery and charger.

You can't determine anything without a meter. The lights on the throttle show the battery voltage. No lights means no battery voltage reaching them, so you have to check, firdt the battery terminals, then the controller, connections, then the throttle connector. It might sound complicated, but...

The one on the left side is a normal thread. You can undo it with a large adjustable spanner. On the right side, you have that lock-ring that holds on that plate arrangement behind it. You have to inspect the thread to see which way it turns because it could be either way. According to the...

You're not getting it. You give up all that as soon as you buy the phone, not when you open up Google navigation. The alternative is not to have mobile communications.

https://www.ebay.co.uk/itm/DNP-Screw-Thread-In-Type-7Speed-Cycling-Bike-Freewheel-11-28T-Cassettes-For-SRAM/373299909097?hash=item56ea6891e9:g:~50AAOSwE0Nfl-H0