Rated 2.8 out of 5 by 5
Rated 4 out of 5 by Happicide Slim form factor. Twice the charge.
Sony is on to something with the sheet battery. Its slim form factor is unobtrusive and twice the charge for mobile computing is nice.
On my old laptop, I had to turn off the system to swap batteries. In some laptops, you have to sacrifice an optical drive to have a 2nd battery.
Not so with Sony's sheet battery. I can just snap it on the bottom of my Vaio and go twice as long without AC power. When attached, it looks like it's just the bottom of the laptop.
The sheet battery even comes with an adapter so you can connect it directly to AC power to charge without being connected to the laptop. Nice!
The way the batteries charge when the sheet battery is connected is quirky. Only one battery can charge at a time. If the sheet battery has less of a charge than the internal battery, as was the case for me, it'll start charging first.
In my experience, once the sheet battery charged to 80%, the primary battery started charging again until fully charged.
The only problem I experienced with charging is the sheet battery didn't automatically start charging again when the primary hit 100%. I tried disconnecting the AC power for a second, then plugged it back in. That did the trick, and the sheet battery is on its way to 100%. But I took a star off of this review for having to do that.
January 17, 2012
Rated 3 out of 5 by QueenSusan13 Worked great for a while
The sheet battery is slim and light, a great idea. However, as someone mentioned previously, I am now having issues with it charging correctly. If I leave the computer off and let it sit over night, it charges fine. However, if I am using the computer with it plugged in, the battery charge on the sheet battery drops over time, as if I am using the sheet battery for power. The only way to recharge, it seems, is to turn the computer off. As an example, I powered up the computer 45 minutes ago. At that time the battery read 80% (which I have set as a max charge.. it is now 37%. This really needs to be fixed because, otherwise, it is a great idea!
March 28, 2014
Rated 1 out of 5 by Fercho Not working
I bought this battery sheet but its not working
In my computer appears battery #1 and the percent. and battery #2 not present and its fully charged and never worked.
December 26, 2012
Rated 5 out of 5 by JesseR Great product
I honestly never take this battery off my laptop. Sure, my laptop is super-slim without it, but it's not too thick with the sheet battery and I can get almost 6 hours on a full charge. On "Speed" setting I get 2.5 hours easily.
Definitely get this battery if you have a Vaio S.
May 27, 2012