1000 mAh Spare Battery for Sony Alpha DSLR-A100,200,300,350,700,900
The NP-FM500 can be charged or discharged at anytime without developing memory effect. This means they never lose their ability to hold a full charge. They also display remaining battery time on the LCD as well as in the viewfinder by continuously communicating with the camcorder.
InfoLithium battery packs have a built-in microprocessor that accurately calculates remaining battery life in minutes.