... Voltage:11.1V,Current:7200mAh . 2.Replacment battery for acer Extensa 3100. 3.Warranty:1year. 4.Certificate:CE,ROHS, ... B2J1,LC.BTP01.101.MS2180. Fits Laptop Model:For acer travelmate 4320,extensa 3100,aspire 3600,3620,5540,5550,5560,5590 ... terminals by keeping your battery pack away from metal objects such as necklaces or hairpins.acer travelmate series Replacement laptop battery for Acer Extensa 3100