If you want a cheap smartphone that packs a generous battery, you may want to check out the Asus ZenFone 3 Max. Amazon just started selling the ZenFone Max for $149, US warranty and free shipping included. This is an unlocked handset that will work on AT&T and T-Mobile, but not on Verizon and Sprint.
Running Android 6.0 Marshmallow customized with Asus’ Zen UI 3.0, the ZenFone 3 Max comes with a 4100 mAh battery that provides up to 20 hours of talk time, or up to 18 hours of Wi-Fi web browsing. You can even use this battery as a power bank to charge other devices via microUSB.
