Who says you cant have your cake and eat it It is absolutely a miracle that this compatible Acer notebook charger AP.09001.003 is both powerful to be 90W and light to be 265g. If you have put it into your bag as a backup, you can figure out it has weights just as an umbrella. The only difference is that this AC adapter for Acer notebook is not water proofed. Come up to the chalk, will AP.09001.003 reduce or maintain its powerful specification after using for periods. Actually, we have our own technicians, old customers and organization inspectors, we have taken the aging rate into account and users can have a free 12-month warranty. Although it may have somewhat reduction after years, such a difference will be small with well maintenance. Furthermore, the 19V and 4.74A power energy has made AP.09001.003 even more powerful than those from OEM manufacturers.