LCD Indicate: Cool Green LCD Indicator Screen shows battery remaining capacity: 25%,50%,75%,100% Fast Speed: The battery charger rapidly charges your spare cell phone battery Adjustable: Input:The length of the battery you are trying to charge should be between 1.65in and 2.76in, Align the positive and negative poles on the charger until the light turns green Universal Charging: Adjustable dock fits over 90% of removable phone batteries and charges via a wall outlet, freeing up your phone for other things Smart built-in IC chip,protections against over heat, short circuit, overcharging and electronic shock