With the progress of technology, the Laptop Battery manufacturing process is more refined and improved. More powerful high capacity batteries are manufactured for laptops of different brands. That is to say, if your original battery is 4400mah, most likely that you are able to find a 6600mah or even higher 8800mah battery for your laptop. Usually, the charge of a 4400mah battery can last for about 2 hours, while the 6600mah or 8800mah can probably last for about 4 or 6 hours.(Anyway, how long the battery charge can last mainly depends on how you use it.) No doubt that everyone will prefer the super long lasting battery. Even if your laptop manufacturer does not offer extended life battery, you can find after market battery manufacturer come up with a much higher capacity version of Dell Laptop Batterythat could work with your laptop. such as, 6600mAh extended dell Inspiron E1705 battery, dell Inspiron 6000 battery(dell 6000 battery), dell Inspiron 9300 battery, dell Inspiron 9400 battery, dell 310-6321 battery, dell 310-6322 battery, dell D5318 battery, dell G5260 battery and dell G5266 battery(9-Cell), while OEM (original equipment manufacturer) battery cost easily over $100+ at only 4400mAh.
