1) Compatible for IBM battery:02K7054 02K7055 02K7056 FRU 02K6928 FRU 02K7053 FRU 02K7057 2)Voltage:14.4V Capacity:4400mah We produce all kinds of batteries for APPLE,HP,DELL,IBM,TOSHIBA, ACER,FUJITSU,SONY and other brands laptop notebook. Your OEM project also warmly welcome!