CWK New Replacement Laptop Notebook Battery for Gateway 4025GZ 4026GZ 4028GZ M320 4012 4024 4025 4026 4028 4030 4035 4535GZ 4536GZ 4538GZ 4540GZ 4541BZ 4542GP 4543BZ 4028GZ 4028JP 4030GH 4030GZ 4520GZ Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!