Acer Main Battery Pack - NinjaBatt Laptop Battery AS07A31 MS2220 For Acer AS07A32 AS07A41 AS07A51 AS07A52 AS07A71 AS07A72 AS07A73 AS07A74 Aspire 4220 4230 4310 4710 4920 5300 5442 - High Performance [6 Cells/4400mAh/48Wh]