LightInTheBox offers the Nitecore i4 Intellicharge Smart Battery Charger for $15.99 with free shipping. That's the lowest price we could find by $8. It's compatible with IMR, Li-ion, and Ni-MH/Ni-Cd batteries.

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.