Mophie PS-PRIME-20 20000mAh power bank

20000mAh portable charger

The Mophie PS-PRIME-20 is a 20000mAh lithium polymer power bank built for users who need multiple phone recharges away from a wall outlet. It delivers up to four full charges for compatible iPhone models and supports a wide range of Samsung Galaxy devices. The black enclosure uses up to 50 percent post-consumer recycled plastics. It suits commuters, travellers and anyone managing several devices through a long day.

18W USB-C PD with 15W shared output

Fast charging reaches 18W over the USB-C Power Delivery port, bringing a compatible phone to 50 percent in roughly 30 minutes. The unit provides one USB-C and two USB-A ports for simultaneous charging, yet total output is capped at 15W shared across all active ports. When three devices draw power together, each receives a fraction of that limit, so charge rates drop compared to single-device use. The 5V operating voltage is standard for the supported phone lineup.

Capacity and practical headroom

The 20000mAh cell comfortably handles several days of typical smartphone use or a full tablet top-up alongside a phone. It runs out when total drawn energy exceeds the stored capacity, which occurs faster if you charge three devices at once because the 15W shared ceiling prolongs each session. Users needing laptop-level power delivery or sustained high-wattage output for larger devices will find the ceiling too low. The pack weighs 0.9259 lb and measures 6.8898 x 3.937 x 1.6929 in.