COSLUS Facial Cleansing Brush Face Scrubber Portable Silicone Waterproof Rechargeable Face Wash Brush, 5 Cleansing Modes The COSLUS portable silicone face scrubber uses a powerful battery, with a battery life twice that of other products on the market. With just 1.5 hours of charging, it can be used for 50 days. Its compact and lightweight design makes it perfect for use at home or on the go, and it comes with a USB cable (adapter not included) for charging. With a super long 50-day battery life, it is truly a portable solution for your convenience while traveling.