LightInTheBox offers the Nitecore F2 Battery Charger
with free shipping
. That's the lowest price we could find by $8. It's compatible with a wide range of lithium batteries, as detailed on the product page. It also has a USB 3.0 Micro-B port.
Note: This item ships from China and may take two to three weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.