Works as expected, great customer support
I installed the new battery, and thought that it was defective because the toothbrush would only work for 1-2 seconds before shutting off. I contacted customer support, and they replied within 1 hour immediately asking if I'd like a replacement unit sent out. I said yes, and in a few days I got the replacement battery.<br /><br />I started replacing the "defective" battery, this time while looking through a microscope. I found out that one of my solder joints was not actually joined to the battery lead, but was resting against it (my fault). That explains why the toothbrush would work for 1-2 seconds before shutting off, likely due to vibrations shaking the battery lead away from the joint.<br /><br />I fixed my bad solder joint, and the toothbrush works now. It has been a couple weeks and it's still running strong.<br /><br />Long story short, soldering can be tricky if you don't have good eye sight and a small iron tip, the battery works well, and customer support is very responsive if you need help.
Rating: 5 stars