When I turned it on to use it I noticed ...
591667
When I turned it on to use it I noticed that one of the speakers was making a screeching sound. It gets louder the more I turn up the volume.
927257
Had problems with it, if you turn it all the way it won't work
3280426
At first I liked it now after I've spent some time using it I've noticed it fails to run the full designated length of track 2/3 of the time the light is properly balanced on a robo stilk I cannot figure it out maybe a faulty product
4792738
I was about to return it because it didn't work the first 8 or 10 times I tried it. It's the way the cord is attached on the bottom. Then, magically, it started working.
3231115
My wife saw it on TV and had me order it.  I was less than excited about getting it but boy was I surprised how much I ended up using it.
4012087
I have a hard time figure out exactly how this thing works and I stopped using because one day it wasn't on when I was pretty sure it should have been so I just gave up on it because I was super paranoid it wasn't going to kick on and off like it should when I couldn't be there
3519614
I liked it when I saw it but when I received it I relalized it is also a great device.
4655551
When I finally got around to using it, it was working it was alright but after a week it started to stop pumping and took a hit to get started again, then it stopped working all together
3428632
when it arrived i turned it on and it turned on and them it just kept restarting over and over again it won't stop i cant use it  i think im going to send it back and demand my money back.
8102
I used it only a few times and Ambon noticing that the charge to my phone is uneven, turning on and off continually.
3449925
Its inconsistent when it turns on. I have turn on and off the switch to get it started at times
543643
I thought that I would be able to charge it up and see a full charge the next time I turned the laptop on. Not the case but it had far better results then the one it replaced. I don't normally run it off the battery so I really don't know how long it will last. The original was bad from the get go but I was not a seasoned laptop user so I didn't realize it was bad until way after the warrenty expired. Hopefully this will last the lifetime of my ownership.
1774006
First time I flicked the switch to on, it blew out and began to smoke. I'm sure it was a rare occurrence but keep his malfunction in mind.
3575741
I discovered a couple of problems with this item that have caused me not to use it.  The indicator window that is supposed to tell the user when the battery being charged is fully charged ALWAYS shows that the battery is fully charged, even if there is no battery in the charger.  My second complaint is that the charger only has two electrical contacts and my battery has three electrical contacts.
3253333
While at first I wasn't sure that I would want it, after I started using it I realized cool it really was.
3624649
Initially, the oscilloscope would only work if the USB cable is connected, but wouldn't power on otherwise. Even after I tried charging the battery for 24 hours. Also, the red light would not stay on when USB is connected. It would flash momentarily and then go off. I was getting ready to return it as defective, but decided to opened the case instead and see if there are any obvious problems. Noticed there is a small switch in the upper right corner inside. Flipped it, now it works without USB cable! The red light also stays on when charging. You could actually toggle the switch without opening the case through a small "slot", but it's hard to see.
6642
I had to fiddle with this thing quite a little to make it work, but eventually got it to work.