Having a good laptop battery is one of the most important parts of owning a laptop， especially if you intend to take advantage of the laptop's portability. Today， this Laptop Battery for Dell Latitude D820 Precision M65(9Cell 11.1v 7800mAh)Silver 207.5*82*22.2(mm) is recommended. Due to the high amount of power that this laptop battery is able to provide， it is typically quite useful and durable. It is extremely powerful while remaining cost effective; you can maximize your laptop's convenient portability and recharge this top-quality laptop battery easily. Overall， getting the power that you need from a battery is important， and this laptop battery provides amazing results for your laptop!                                    Features             You can get long hours of battery life without having to frequently plug into recharge with the notebook battery<br> No memory effect. Chargeable even if it has not been used up yet<br> Using advanced cell technology and quality parts， the notebook laptop battery guarantees the stamina you need for long work sessions and travel<br> Manufactured to the highest quality available， notebook laptop battery with true enhanced performance<br> Notebook laptop battery is powered by high quality cells<br> The replacement laptop battery recharges while it is installed and the computer is connected to AC power     <br>                                                            Specifications             Battery Type     Replacement Battery    <br> Cell Type     Li-ion    <br> Battery Cells     9-cells    <br> Voltage     11.1V    <br> Capacity     7800 mAh    <br> Color     Gray    <br> Dimensions     (8.15 x 3.23 x 0.79)" / (20.7 x 8.2 x 2)cm (L x W x H)    <br> Weight     16.22oz / 527g    <br> Manufacturer Warranty     3 Years    <br> Compatible with     DELL Latitude D530 D531 D531N D820 D830， Precision Workstation M65 M4300     <br>                                                             Package Includes            1 x Laptop Battery<br>                                                            Extra Info            Compatible Part Number:<br>310-9122，310-9123，312-0393，312-0394，312-0401，312-0402，312-0537，312-0538，<br>451-10308，451-10309，451-10326，451-10327，999C5830F，999C6570F，CF623，CF704，<br>CF71， CR160，CW666，CW674，DF192，DF230，DF249，FF231，FF232，GR932，GX047，<br>HR048，HX306，JT784， MM156，MM158，MM160，MM165，NX618，RW220，TT721，<br>WN791，WN979，XD735，XD736，XD739，YD623，YD624，YD626，YW652，YW670，TC030