Watson 4-Bay USB Charger and Portable Power Pack for AA and AAA NiMH Batteries For 2 or 4 AA/AAA NiMH Batteries | Charges AA/AAA Simultaneously Charging Time: 1.9-6.0 hr | Micro-USB Input for Charging Batteries USB 2.0 Output to Charge Mobile Devices | Reverse Polarity Protection What's In The Box: USB-to-Micro USB Cable - 23.6