Help for sony PCGA-BP1N battery life?

Question:I recently bought a sony PCGA-BP1N battery, i keep it on high perfomance and my battery life only last about 1 hour and the battery capacity is already 5200 mah, can i find a battery higher then that if so where? or should i drop my performance to normal which will give me about 2 hours. Answer:would drop it to less than normal for battery unless you need hi-performance for some app you are using .. 1. Lower CPU performance. 2. Lower screen brightness 3. Make screen saver turn power off to screen quicker. 4. Use an external monitor and shut down built-in LCD.5. Buy another battery ($150+ for this model. Ouch!) Model is Dell: Dell Inspiron 710m , Dell Inspiron 8500 , Dell XPS M1210 battery , Dell KD186 battery , Dell HD438 battery , Dell XD187 battery , Dell YD624 battery , Dell XD736 battery , Dell DF230 battery , Dell YD626 battery , Dell GX047 battery , Dell TD175 battery , Dell TC030 battery , Dell PC764 battery , Dell JD634 battery , Dell G1947 battery , Dell H5559 battery , Dell F1244 battery Sony:sony VGP-BPL5A battery , sony VGP-BPS5A battery , sony VGP-BPS5 battery , sony VGP-BPL1 battery , sony PCGA-BP2NY battery , sony PCGA-BP2NX battery , sony PCGA-BP2SA battery Acer: Acer BTP-APJ1 battery , Acer BTP-73E1 battery , Acer 909-2620 battery , Acer BTP-AMJ1 battery , Acer BTP-ASJ1 battery , Acer BTP-37D1 battery , Acer BTP-3761 battery.