To charge the battery while it’s attached with your phone:
Plug your charger into the phone’s USB port.
All status lights briefly turn solid, followed by solid light at each charge level and a blinking light at the current charge level. If the battery is fully charged, all lights are solid. After 30 seconds all lights turn off and the attached battery continues charging.
The TurboPower charger that came with your phone charges the phone and attached battery simultaneously. Other chargers fully charge the phone, then charge the attached battery.
You can also charge your phone and the attached battery by plugging your charger into the USB-C port on the attached battery. The phone’s battery fully charges first, then the attached battery charges.
To charge the battery while it’s detached from the phone, plug your charger into the battery’s USB port.