The Moto X line of phones has never had stellar battery life, but for most users these phones will last the day with no problem. This is especially true of the Moto X Pure Edition and its 3,000mAh battery. You're trading battery life for features with this phone, and that means it's not hard to stretch your battery beyond your initial experience if you know where to look.
Here's a few quick tips on getting more battery out of the Moto X Pure Edition.
Set Adaptive Brightness Low
Google's internal brightness controls are nice and fast, but are ultimately designed to only work within a segment of your brightness gauge. Adaptive brightness will never go from lowest possible setting to highest possible setting on your brightness bar on its own, so if you want your screen to use less power you need to reach in and control the brightness yourself. The easiest way to do that is sliding the brightness bar in quick settings down to a more manageable level. This way your phone still changes brightness a little in environments where that is important, but you're never reaching the max brightness and consuming all that extra power.
You could also disable Adaptive Brightness entirely in Settings>Display, and set the brightness to an exact point whenever you want. This isn't going to get to too much more battery, but if every bit matters this won't hurt.
Battery Saver Mode
Like most phones, the Moto X Pure Edition flips into a power saving mode when you get below 15% battery remaining. This Battery Saver mode slows things down on your phone and dims the brightness, as well as limits the activity of apps in the background. It's a great way to stretch that last 15% out for a while, but it's also something you can enable on your own whenever you like.
Head to Settings>Battery and tap the menu button in the top right. The only option there, Battery Saver Mode, will take you to a page where you can enable this low power mode whenever you want. This can be disabled whenever you want, but will be disabled automatically when you connect the phone to power.
Disable Moto Features
Motorola's sweet list of unique features is a big part of what sets a Moto X apart from the rest of the phones out there, but they also use a decent amount of battery. Moto Display, Moto Voice, and Moto Actions are all very cool on their own, but together the battery drain is noticeable. If you absolutely must get the most out of your battery, you should consider disabling some or all of these features for a little while.
Head to the Moto App, and under each category you'll find check boxes for everything Motorola does to make your phone awesome. Turning these features back on doesn't take anything other than re-checking these same boxes, so head back to the Moto app when you're finished and you can have your features back.