Samsung SPH-a740 Series User Manual page 22

Charging the Battery
Your phone's LiIon battery is rechargeable and should be charged as
soon as possible so you can begin using your phone.
Keeping track of your battery's charge is important. If your battery
level becomes too low, your phone automatically turns off and you
will lose all the information you were just working on. For a quick
check of your phone's battery level, glance at the battery charge
indicator located in the upper-right corner of either of your phone's
display screens. indicates that the battery is full. If the battery
charge is getting too low, the battery icon blinks and the phone
sounds a warning tone.
Always use a Samsung-approved desktop charger, travel adapter, or
vehicle power adapter to charge your battery.
Warning!
Using the wrong battery charger could cause damage to your
phone and void the warranty.
13 Getting Started