This is a brand new Extended Run Dell replacement battery. This long run battery will run at least 50% longer than the standard capacity battery that ships standard with your laptop. This battery is going to be LARGER than the original battery and will protrude to the rear of the laptop but will not be noticed when the screen is open, it will still snap into your computer and power it up. The added run time is achieved with an additional 3 cells inside the cartridge. Users of this battery pack experience an additional 1-2 hours of run time over the standard battery. Estimated run time with this battery is 3-5 hours. Longer run times can be achieved by minimizing the power use, especially the screen brightness. The superior South Korean cells inside the battery cartridge will provide longer run times between charges as well as a longer service life than cheaper batteries. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This means you can recharge your laptop any time without diminishing your battery capacity. This laptop battery replacement is typically superior to the original battery and is 100% compatible with your Dell laptop computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 1 year warranty.

Not all computer batteries have the same capacity and run times. The higher capacity battery cells inside this cartridge have an energy capacity of 7800 mAh. These are the highest capacity Li-ion batteries on the market today and superior to batteries rated at 4400 & 5200 mAh. This battery will deliver up to 60% more run time than cheaper 6 cell versions. If you prefer the 6 cell battery, click here (DELL-78).

This battery replaces the Dell Inspiron 1520, 1521, 1720, 1721 & Vostro 1500, 1700 series laptop batteries and additional machines which are listed at the extreme bottom of this web page.

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.