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 it~s easy to use: Load up the device, plug into the wall, and get fully loaded battery power when you need it. The charger~s 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 world~s #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.