Mlais MX Base Android 5.1 Lollipop MTK6735 64bit 4G LTE Smartphone on the Gearbest flash sale for only USD$109.99 with free shipping.
Specs look good for the price and the battery looks amazing:
4300mAh removable lithium polymer battery
5.0 inch HD Screen (1280 x 720)
2GB RAM
16GB ROM
MTK6735 64bit Quad Core CPU
5.0MP+8.0MP Camera
Network:
2G: GSM 850/900/1800/1900MHz
3G: WCDMA 850/900/1900/2100MHz
4G: LTE 800/1800/2100/2600MHz
Wowsers, Impressive for something so slim and small screen wise.
Edit: I continued to look at the image and noticed the back is fairly curved so not such a slim device ;) … which would make sense.