Hitting waste where it hurts. AA and AAA are the biggest contributors to the single-use problem. This kit is a great commitment to a better way - with 8 AA and 8 AAA USB-C batteries, two charging cables, storage cases and minimalistic curb-recycleable packaging. Fast Charging Lithium Battery 1000+ Charge Cycles Convenient USB-C Charge Port Use the included cable to charge four batteries at once. Built-In LED Charging Indicator Paleblue Batteries let you know when they are fully charged. On-Board Smart Technology Provides Safe Charging No more batteries ruining expensive electronic devices!