Surface Book review

Surface Book review
Welcome to a Biomedical Battery specialist of the Lenovo Laptop Battery
Microsoft rates the Surface Book for up to 12 hours of battery life with the keyboard dock attached. I'd say that's a conservative estimate: I logged nearly 14 hours on the integrated-graphics model, and that was with a 1080p video looping and the brightness fixed at a punishing 65 percent. Even the configuration with a Core i7 CPU and discrete graphics managed 11 and a half hours in the same test, and that's on par with the 13-inch MacBook Pro, which doesn't have discrete graphics. Either way, I have no doubt that with a dimmer setting (not to mention the ambient brightness sensor enabled), you could squeeze out even more runtime.
The catch is that most of that battery with like Lenovo ThinkPad X120e Battery, Lenovo FRU 42T4789 Battery, Lenovo 57Y4559 Battery, Lenovo 121001096 Battery, Lenovo 57Y6455 Battery, Lenovo IdeaPad G560 Battery, Lenovo IdeaPad Z570 Battery, Lenovo Thinkpad R400 Battery, Lenovo ThinkPad T400 Battery, Lenovo 41U3196 Battery, Lenovo FRU 42T5227 Battery, Lenovo FRU 42T5264 Batterycapacity lives inside the keyboard dock, meaning you won't be able to use the Surface Book for more than a few hours in tablet mode before needing a trip back to the charger. With a Core i5 processor, the tablet lasted a brief three hours and 20 minutes; with a more power-hungry i7 chip, that number dropped to three hours.
In any case, I suppose none of this is surprising: It's a 1.6-pound tablet with a Core processor and a 3,000 x 2,000 screen. Something has to give, and that something is battery life. I won't knock the Surface Book too much for that, but I would remind you to see this for what it is: a laptop that can be used as a tablet. If what you really want is a tablet that can replace your laptop, you'd be better served by the Surface Pro.
Configuration options
The two Surface Book configurations I tested represent two extremes: the entry-level model and the most tricked-out SKU Microsoft has to offer. Separating them is $1,700 -- and a potentially big performance gap. So let's break down what you can get as you move up in price. Starting at $1,499 you get a Core i5 CPU with 8GB of RAM, a 128GB SSD and integrated graphics. For $200 more ($1,699) you can double the storage to 256GB. Microsoft also recently added a new option at that $1,699 price point. Essentially, you have your choice of either doubling the storage to 256GB or adding in discrete graphics to the Core i5/128GB model.
If you want both discrete graphics and more storage, the least expensive model is the $1,899 configuration, which also has a Core i5, 8GB of RAM and 256GB of storage space. From there, you can get a Core i7 machine with the same NVIDIA GPU and 256GB of storage with 8GB of RAM ($2,099), or a 512GB SSD with 16 gigs of memory ($2,699). Finally, that brings us to the big kahuna: a $3,199 beast of a system with a Core i7 processor, 16GB of RAM, discrete graphics and a full terabyte of solid-state storage. Basically: the one we all want, but few of us can afford.