Even if it isn't perfect

Even if it isn't perfect
Welcome to a Biomedical Battery specialist of the Lenovo Laptop Battery
When Microsoft unveiled the Surface Book, I was just one of many who said that other PC makers should be worried. Still, that doesn't mean they're doomed. Although the Dells, HPs and Samsungs of the world sell flagship laptops, most of them are in a different category than the Surface Book. Which is to say, they tend to be thinner and lighter, but their specs aren't as robust and they aren't quite as comfortable to use in tablet mode. If you're looking for a machine with discrete graphics, and maybe 16GB of RAM and a full terabyte of solid-state storage, you wouldn't have been satisfied with the likes of the Dell XPS 13 ($800-plus) or HP Spectre x360 ($900-plus). Likewise, if you don't require that level of performance -- or if you don't care about using your PC as a tablet -- you might indeed prefer one of those other models, both of which weigh less than the Surface Book.
Also, most competing Windows laptops with such as Lenovo 40Y8314 Battery, Lenovo FRU 42T5206 Battery, Lenovo FRU 42T5251 Battery, Lenovo 3000 Y300 Battery, Lenovo 43R1954 Battery, Lenovo L08S6D12 Battery, Lenovo IdeaPad U330 Battery, Lenovo IdeaPad Y330 Battery, Lenovo 43R1955 Battery, Lenovo 121TS040C Battery, Lenovo 3000 Y410a Battery, Lenovo 3000 Y400 Batterystart somewhere below $1,499 -- often well below. So, you know, they have that going for them too.
That said, there are a couple Windows models that come a little closer to competing with the Surface Book. One is Dell's redesigned XPS 15. Yes, it's bigger than the Surface Book, and has a fixed screen, which means you can't use it as a tablet. But at 3.9 pounds, it's in the same ballpark as Microsoft's laptop, and with a compact footprint more in line with 14-inch notebooks, it's not that much bigger than the 13.5-inch Surface Book. Also, it has the potential to perform like the Surface. Although the entry-level $1,000 model has plain ol' integrated graphics, the top-end configuration packs a sixth-gen Core i7 processor, color-accurate 4K screen, 16GB of RAM, a 2GB NVIDIA 960M GPU and a 1TB PCIe SSD. Battery life there is rated at up to 17 hours with a lower-res 1080p screen, but even with that top-end SKU, you're still looking at around 11 hours, according to Dell.
You also might want to consider Lenovo's just-announced Yoga 900 ($1,200 and up), which replaces last year's Yoga 3 Pro. At 2.8 pounds, it's considerably lighter than the Surface Book, and can also be used in tablet mode, but it, too, is offered with sixth-gen Core i5 and i7 processors, a similar 3,200 x 1,800 screen and up to 512GB of storage. The trade-off seems to be that in exchange for a thinner and lighter design, you get shorter battery life (up to nine hours, says Lenovo) and no discrete graphics.
And, of course, there's the machine against which Microsoft itself is comparing the Surface Book: the MacBook Pro. Let's stick with the 13-inch Retina display MBP, which starts at $1,299 and weighs a similar 3.48 pounds. At that price, it comes with a Core i5 processor, 8GB of RAM, a 128GB SSD, Intel Iris 6100 graphics and a 12-hour battery, although you can also configure it with a 1TB solid-state drive. Other than that, though, Apple has saved its best specs for the 15-inch MacBook Pro, including discrete graphics and a quad-core Core i7 option. There's nothing wrong with the larger model, except at 4.49 pounds it's far heavier than the Surface Book. Either way, it has no touchscreen and can't be used as anything other than a clamshell laptop. Similar to what I said earlier, if you want something that can double as a tablet, you're likely to ignore the MacBook Pro, regardless of the size.