The replacement knob is made out of metal and works very well. It would be great if the original knob that came with the bike was also made of metal to avoid having to replace the first one!

Easy install, seems to do the job.

Some how I broke the plastic battery knob release and had to order another.
Unfortunately the shipping was twice the cost of the part (no fault to Biktrix)
They shipped it right away and this time it was made of steel 👍. Great upgrade
Thanks Biktrix

Poor quality. Broke too easily

I was surprised that everything I needed was readily available and how quickly the order was processed and shipped

I purchased a replacement knob for the battery release. It was shipped the same day and made it to Vermont in two days. Awesome customer service. The knob came, all shiny and clean. It was brand new. I took the old broken one out ad the new release knob gives me a nice piece to get my fingers on and it turns just like a well made lever would. This is one of the best turn-y things I've ever turned. It's like it was made for fingers.

Mine shattered and I needed a new one so to my surprise they are available
Got a new one works perfect

My battery thumb lock on Hub Duo broke. It was made of plastic. Biktrix support sent me a metal one as a replacement. That is good because it now will never break again. The support of Biktrix is very good. They are very fast to respond if you have a problem with your bike. The bikes are not perfect, no bike is. Any bike can have a defect. But what makes a bike great is if the company that sells it, supports it. Biktrix does that.

The original knob was plastic and broke easily while the replacement appears to be metal and obviously much more durable.