Yes.
I have one of those style packs and it will run MY laptop about 4 hours.
Be aware the ratings on that are totaly and completely Fictitious. It is impossible for a battery that size to have that sort of capacity and discharge.
You should take a look at the " dealing with some ebay sellers" Thread.
I have found it VERY difficult to find these that are true to rating. In the few I have had, I have also found the ones with the less Features ( Flashy lights, power readouts etc) to be the best. These things seem to take up room in the pack and leave less space for the battery. An indication of power and capacity is weight. The more they weigh, generally the bigger the battery.
The MOST you will get out of a normal sized pack of this type is about 4 Ah, maybe 6. There are larger truck types with more capacity and amp output but they are disproportionally more exy. If you want to mainly use a laptop or appy them for portable power, get the plainest type you can get. will be cheaper and probably more bang for the buck.
The bigger the claims on capacity for these things AND most other Lipo and 18650 type batterys, they cheaper and less capacity they tend to have. Something with a more modest rating will almost always be better than something screaming 10X the capacity/ output.
I also use mine to power a remote camera for about 9 hours and they are good for running USB devices from or charging them.
They will also even start Cars!! :0)
Do your homework on these things. The crap outnumbers the decent one by a factor of about 50.
The good ones are excellent and having had them for a while, can't do without them now.
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