Universal battery charger is an ideal device to charge your spare battery, especially if you have a phone with disabled charging port(s), easy operation makes this device a very handy tool, charge almost any size cellphone, PDA, MP3, Camera or cordless Ni-MH battery (depending on capacity), simply slide to expand the cradle, then place the battery and lock the battery facing battery contact points toward the charger, adjust contact prongs and slowly push / slide the battery in to make prongs to contact with + – points of the battery, plug it to the wall, the LCD display will indicate the battery level and once its fully charged unplug the charger, battery is ready to use, you can also use your data cable to connect the charger while its charging your battery to your phone to enjoy your device ( this feature may not be available on all phones, check your owner’s manual for reference.