Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Defective design

The lead from the power supply to the computer is defectively designed such that the wires at the supply end disconnect themselves with repeated use (at the rubber piece that bends). They do not sell this item separately from the product as a whole so you will need to re-purchase the whole thing.Their tech support is sufficiently slow that it took weeks for me to even discover this information (We traded 12 emails back and forth on this issue) and I had to buy an OEM supply to work my computer in the interim. Finally they agreed to replace the lead under warranty, just in time to not help at all.lifespan: 4 months