I ordered 2,000 of these little chargers to use with a fast charging cable I ordered from the company to maximize overall charging speeds. This charger is very useful and really improves the charging speed. When I plug it in with this charger it doesn't drain at all. It maintains 100% charge! They can be customized with USB and C ports to make them more versatile. They are stylish and attractive. The price/performance ratio is very good.