At 2400 mAh, this extended battery crams more multimedia possibilities into a similar-sized package. - Brand-new extended battery. Included battery door cover accommodates slightly larger form factor. - Perfect as a replacement or spare!. - Designed specifically for the BlackBerry Curve 8520/8530. Extended Battery w/Door for BlackBerry Curve 8520/8530 (2400 mAh) Your BlackBerry Curve 8520/8530 is a fantastic device, but its ''standard issue'' battery doesn't quite cut it. - Constructed with premium-grade Lithium cells. Level the playing field with a cellular fuel source that can handle the super performance. - Offers excellent talk and standby time. Now you can watch more HD video content, stream countless jams from your music library and stay connected with friends and family longer.