Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: I have an Esprit E3 eliptical and need a replacement power cord.  I need a 9VDC 1A, as per the eliptical.  Will this charger work?
Document: Although it is very cheap, it also feels cheaply built with an incredibly short cord. If you need a 9V DC power adapter and cord length is not an issue, this will work perfectly.NOTE: Before purchasing, be absolutely sure YOU checked that you have the polarity right. You can't blame a product for not working when you get the polarity wrong in the first place.Pros:-Cheap price-Does its job perfectCons:-Very short cord
I got this for my Casio keyboard. in the move, my old power supply went missing, so I went to amazon for a cheap replacement. First off, if you can't solder and you need the center pin to be negative, don't buy this. this is backwards of the industry center of grounded pin, positive shield.
Not the best build quality I've ever seen, but gets the job done. Swapping the polarity with a quick desolder / solder was very easy like a previous reviewer suggested, and am using its as a cheap replacement for my vintage synth with a missing power cord
I got a few products that I needes to power with this and I had the horrible dissappointment that 2 out of the three that I ordered were for overseas use, yeah that's right with the wrong kind of input, and the other one doesnt work on my 1A products, I would return them but it would cost me more to return them and get y money back than keeping them, hope somebodyelse has a good experience with one
Did not work properly, charger has a buzzing sound when I plug it in. maybe others will work but it is poor quality nonetheless.
Not sure what else you can say. It replaces one that was broken and works as advertised. If you need a replacement adapator you can depend on this one.
It didn't work and the cord is only like two feet long. I would not recommend it. Good thing it was only a few dollars.
I am using this as a replacement power adapter on a DiamondBack stationary bicycle for the digital readouts. Works fine just fine and beats the heck out of the price for the original!
I tripped over the cord of the power adapter for my elliptical and broke it. This adapter does not look or feel as good as the original but has been doing the job for the past month.
This turned out to be the wrong polarity for my product. Not the power supply's fault. Just make sure you are ordering what you need. This supply has ground on the outside of the plug and +9V on the inside. Most of them are this way, but my electronic tuner required the opposite. I just swapped the leads internal to the power supply and it works with the tuner now.
Answer: I find that the the connector piece is important..I've purchased many that do not fit but are otherwise the correct voltage. Look closely at the piece that fits into the device and see if it will fit. Hope this helps.