TCL 4021 User Friendly Mobile Phone, 4.6 cm (1.8 inch) 2G Display, Rear Camera, 4 MB RAM, ROM, 1030 mAh Battery

Currys

Good to know - If you need a phone that just lasts and lasts, this TCL can get up to 10 days of standby time- Switch to the speakerphone while you prepare dinner and enjoy a hands-free convo- It's got an LED torch that'll come in handy if you're rummaging in the dark

Amazon

12.7mm slim design 1.8’’ display 1030mAh battery