This is a brand new extended run large capacity Acer replacement laptop battery. It features lithium-ion cells. Li-ion battery technology provides longer run times with less weight. This battery is going to be physically larger than the original battery. The rear of your laptop will tilt up slightly allowing for greater air circulation underneath the laptop and greater ease of typing. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This laptop battery replacement is 100% compatible with the original battery specifications and is individually tested and backed by a 2 Year warranty.

You can expect about 4 - 6 hours of run time with this computer battery when new, depending on your energy use.

Like all Li-ion primary batteries, your run time will decline over time.

This battery replaces the Acer Aspire PEW71, 4551, 4551G, 4741, 4741G, 4741Z, 4771, 4771G, 4771Z, 5741, 5741G, 5741Z and Acer TravelMate 4740, 4740G, 4740Z, 5740, 5740G, 5740Z series laptop batteries.

Laptop Battery Express only deals with brand new premium computer batteries. We never carry recycled or used batteries. We only use the highest quality cells inside the battery pack so you will have a long service life (300-500 recharge cycles). We do not use cheaper battery cells which can wear out in a little as 6 months. Our inventory turns rapidly and you will always receive a freshly manufactured battery.