Keep the power you need at hand with the convenience of Energizer Recharge Value Charger. This handy device charges 2 or 4 AA or AAA NiMH batteries in 5 hours.* And its easy to use: Load up the device, plug into the wall, and get fully loaded battery power when you need it. The chargers indicator screen glows green when you have a full charge. Should you insert a bad or primary battery, the screen pulses to notify you. Perfect for those most used devices like remotes, computer mouses, and even gaming controllers So maximize battery performance with the charging power of Energizer, the worlds #1 recharge brand (according to market survey data). Specs at a Glance: 2 or 4 AA or AAA NiMH batteries Comes with four (4) 1300 mAh 1.2V AA Energizer Recharge Batteries Large LED Charge Status Indicator Screen (red glow = charging, green glow = complete) Bad & Primary Battery Detection (screen flashes when detected) Reverse Polarity Protection Delta V Charging Cut-off Safety Timer to prevent overcharge Limited Lifetime Warranty (see manual for details) * Times may vary by NiMH battery.