portable charger

Translations
портативное зарядное устройство
I need a portable charger for my phone.
Мне нужно портативное зарядное устройство для моего телефона.
Definitions
A portable charger is a compact, battery-powered device that can be used to recharge electronic devices, such as smartphones, tablets, and laptops, while on the go, without the need for a wall outlet.