I recommend the Efest Blu6. They're about $40 regular price at ecig.com I believe. I love mine. Can charge 6 at .5 amps, 4 at 1 amp, or 2 at 2 amps. The real reason to get it over others is the Bluetooth, IMO. It's so nice and works flawlessly. You can monitor all your batteries in detail, and change the charging rate from your phone. It's so nice to be able to keep an eye on your batteries elsewhere in the house. Check the app, pull em if they're done. If it had push notifications for when they finished charging it would be perfect, that's a small complaint, though. It's well worth it.