Finally, the keyboard, touchpad, and TrackPoint system are what you'd expect from a ThinkPad. The keys are slightly cupped, they have a lot of travel, and they make a satisfying click. The appropriately-sized touchpad uses Precision drivers for the full range of Windows 10 gestures, and the TrackPoint system remains intact, with three physical buttons and red pointer. It all works as it should, and comfortably at that.Like a lot of Lenovo's cheaper laptops, the ThinkPad L380 suffers from a display with low brightness and poor color reproduction. The brightness issue is a bigger deal here, with the display hitting just under 250 nits. It has a matte finish that helps cut down on glare, but in a well-lit room you'll probably find yourself wishing for a few more increments of brightness. Testing color accuracy, the L380 hit 66 percent sRGB and 49 percent AdobeRGB, both pretty low results. This isn't a huge deal on a business-oriented laptop — as long as you don't plan on any photo or video editing — but it's still something to keep in mind.

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The other main grievance I have is with the SATA SSD. Here Lenovo's gone with a Samsung PM871b, with a faster PCIe option available. In testing, I got a 545 MB/s read speed and a 528.9 write speed, which is average for budget devices. The great thing, though, is the ease with which you can swap out the SSD down the line for something far faster.Other than the dim display with poor color reproduction and the slow SSD (which can be upgraded at checkout or easily swapped out after purchase), Lenovo's ThinkPad L380 has a lot to like. Its 13-inch size hits the sweet spot for many people, there's a good selection of ports that will cover accessories for the next few years, and it's built well, true to the ThinkPad line. It's also priced competitively, opening it up to a large audience that can't splurge on the higher-end X- and T-series ThinkPads. All-day battery life and versatile USB-C charging ports means most days you can leave your charger behind when heading to the office.

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It’s not something you often give a lot of thought to, but the modern consumer laptop battery is a pretty advanced piece of technology. Not only does it pack several dozen watt-hours of energy into a relatively small and lightweight package, but it features integrated diagnostic capability to make sure all those temperamental lithium cells are kept in check. Widely available and extremely cheap thanks to the economies of scale (unless you try to get them from the OEM, anyway), they’re a very compelling option for powering your projects.Of course, it also helps if, like [teliot] you have a bunch of the things lying around. For reasons we won’t get into, he’s got a whole mess of Acer AL12x32 battery packs which he wanted to use for something other than collecting dust. He had the idea of hooking one up to a solar panel and using it as a power supply for some ESP8266 projects but wanted to be able to talk to the battery for status and diagnostic information. After studying the Smart Battery System (SBS) protocol the batteries use, he was able to come up with some code that lets him pull 37 separate fields of information from the pack’s onboard electronics using his ESP8266.