Test System, Battery Runtime
|Notebook||Dell Latitude D630, Mobile Intel GM965 Express Chipset|
|CPU||Intel Core 2 Duo T9500 (45 nm; 2600 MHz, 6 MB L2 Cache)|
|RAM||Corsair ValueRAM, 2x 2048 MB DDR2-667 SDRAM 5-5-5-15|
|DVD ROM||8x DVD+/-RW|
|Wireless||Intel 4965 WLAN (802.11a/g/n) mini Card|
|Screen||14.1 inch Wide Screen WXGA+ LCD (1400x900)|
|Graphic Card||Intel Integrated Graphics Media Accelerator X3100|
|Power Supplies||9-cell/85 Wh Primary Battery|
|System Software and Drivers|
|OS||Windows Vista Ultimate 6.0 Build 6000 SP1|
|Platform Drivers Intel||Version 188.8.131.524|
|Graphics Drivers||igdumd32.dll (7.14.00.10.1253)|
|Benchmarks and Settings|
|VLC||Version 0.8.6h, Playing VOB file in continuous loop|
Run Time Results
We played the vob file from the notebook’s hard drive in a continuous loop to stress both batteries until they were empty. We connected the Universal Notebook Battery to the Latitude D630 notebook and launched BatteryMon 2.1 as well as the video playback. After three hours and 38 minutes, BatteryMon reported that power supply switched to battery mode, which means that the APC battery was now empty. We still had a remaining run time of four hours and 35 minutes. In the end, the Dell notebook played the video file for eight hours and 13 minutes, which gave us an 80% battery run time increase on top of the notebook’s 9-cell battery.
|APC Universal Notebook Battery||3h 38min|
|Dell 85Wh||4h 35min|
We also did some battery run time testing without any active workload, which resulted in approximately 11 hours of battery run time using both batteries. Run time can probably be even longer if you force yourself to work with very low display brightness. The second test showed the same 80% increase in run time, mainly because this is effectively the battery capacity difference between the 85 Wh Dell battery and the 70 Wh APC Universal Notebook Battery (82% gross difference).
If you maximize the notebook power saving features and limit display brightness to a reasonable level—which is certainly possible on a plane—you will be able to hit more than nine hours of battery run time when working with desktop applications.
Check prices for APC's Universal Notebook Battery 70