"Full Range AC adapter, AC in 100~240V, 50~60Hz, DC output 20V, 15A, 300W
Removable 8 cells Smart Lithium-Ion battery pack, 89.21WH
Battery life: 150 minutes (with AMD Radeon™ HD 7970M single, 89.21WH battery)"
300w AC adapter! I'd still watch out when fully loading the machine with a high end quad core and dual GPU config. The adapter's going to get hot since it is only passively cooled even with it's high rating, and there won't be cheapo aftermarket AC adapters for this on Ebay so be careful!
2.5 hour battery life with one GPU is impressive, thanks to modern GPUs and CPU/chipsets.