Apple’s estimates and early reports indicate that the iPhone X’s battery life will site somewhere between the iPhone 8 and iPhone 8 Plus, so if that’s not going to cut it for you, you can already grab a 4,000mAh battery case for just $30 with promo code YRZQ7IO5.
And in case you missed it, a few Anker cases are on sale as well, albeit without built-in batteries.