About 11 minutes
up to 5 hours max depending on laptop battery consumption rate
The number that you refer to is the ampacity of the battery. The higher the number the longer the battery will operate in the device. As long as the voltage output of the two batteries are the same it will not ruin your laptop.
Most laptops come with two different battery options, one that's small and light, and one that's bigger and heavier and offering more runtime. If the bigger battery is listed as compatible with your laptop(there's no standards when it comes to battery compartments), then you're good to go.
mAh is a rating of a battery's capacity. A 4400 mAh battery is capable of delivering 4.4 amps of current for one hour. A 6600 mAh battery is capable of delivering 6.6 amps for one hour. That is not to say that both batteries will only last for one hour, since the laptop will probably draw less current than that. The important thing to notice is that the 6600 mAh battery has 50% more capacity than the 4400 mAh battery. If battery life is your #1 priority, the larger battery would be a good choice. However, it may be larger and heavier than the 4400 mAh battery. If a small, lightweight laptop is #1 priority, the smaller battery might be better. Also, if the laptop will not be unplugged, on the go all the time, the smaller battery might be a better choice due to it being cheaper. As all things engineering, there are compromises to be made.
Do you mean 6600mAh? In relation to a battery this would mean a capacity of 6600 milli-Ampere hours. In other words the battery can supply 6600mA for 1 hour.
6600 as a fraction= 6600/1
The multiples of 6600. Just calculate 6600 x 0, 6600 x 1, 6600 x 2, etc.
33% of 6600 = 6600*33/100 = 2178
75% of 6600= 75% * 6600= 0.75 * 6600= 4,950
6600
Short answer - Yes. I just got an xti and had the 6600 that I used on my Rebel film camera. It fires ok on the xti but I have not fully tested it. (distance, etc) I believe that it will be ok..... Sign me...Novice
6600