Review of DELL MR90Y Laptop Battery

The DELL Inspiron 15-3521 does not achieve the best runtimes with its MR90Y 65 Wh lithium ion battery despite the low-voltage hardware (good ultrabook 6-8 hours in the WLAN test). Four hours in this practical setting are not acceptable for the 15 incher. Despite the fact that they have less capacity and 35 watts CPUs, the competitors IdeaPad Z580 (L11L6Y01 48Wh Battery, 4:34 hours) and Aspire V3-571G (48 Wh, 3:16 hours) run longer (Z580) or compensate this disadvantage with more computing power (V3-571G).
 
It is standard practice to test the battery runtime when watching DVDs. With 2:04 hours this test ends even faster than the WLAN test. The second measurement, which played the movie from a hard-drive, ended at 2:14 hours.
Given these short runtimes, the charge time of 3:45 hours is far too high (charging when device turned on, idle). This cannot be caused by excessive demands on the power supply which supplies 90 watts.
 
Case  
Why always show off with aluminum, when a little bit less would have sufficed? In the last years cases became more and more high-grade. The OEMs know how to punch, brush and anodize aluminum. Through mass-production this procedure was made available for the lower price-ranges. Nevertheless, it makes a difference in purchasing if plastic or a aluminum-plastic compound is ordered. When, in addition, high-quality hardware shall be offered at a low price point, there is nothing else to do for the manufacturer but to choose a low priced chassis. The DELL Inspiron 15 is equipped with a DVD-RW drive and a spacious hard drive to store your music, movies and pictures.