ASUS K40IL Battery  http://www.deal-battery.com/asus-f52.html , This is a brand new ASUS K40IL Series battery to replace your current aging battery. Get your full battery back up time back. We offer replacement batteries for you at a bargain price. This ASUS K40IL Series battery is rigorously tested and safety to exceed original equipment manufacturer specifications. There is no battery "memory effect" with this rechargeable battery. ASUS K40IN Battery  1.New asus k40in series battery must be fully charged before use. 2.New battery pack needs to be fully charged and discharged (cycled) a few times before it can condition to full capacity. 3.Laptop battery undergo self-discharging when left unused. Always store a asus k40in series battery pack in a fully charged stage for storage. 4.Fully drain and fully recharge your battery every few months. ASUS K40IP Battery  http://www.deal-battery.com/asus-k40s-series.html Just like there are many different makes and models of laptops, there are also different technologies used in laptop batteries. Whether you're purchasing a replacement ASUS K40IP Series laptop batteries, looking for spare external laptop batteries, or trying to get every last ounce of juice out of your current ASUS K40IP Series laptop batteries, it's important to know which technology is compatible with your specific laptop. Knowing this will help you decide not only what kind you need, but also how to keep it clean and healthy, and maintain a nice long battery life through proper care. ASUS K40S Battery  http://www.deal-battery.com/asus-k40ip-series.html This ASUS K40S battery replacement is rated at 10.8V or 11.1V, 4400mAh / 6Cell. This replacement battery for ASUS K40S is 100% compatible and will meet or exceeds original specification. Our ASUS K40S battery has been tested for safety and designed for high performance. ASUS K40S Battery is made from the highest quality cells and parts. Our provides reliable, high performance replacement batteries for your original laptops. The ASUS K40S Battery is designed to be 100% manufacturer compatible with OEM part numbers. This precision-engineered battery is designed for use in the ASUS K40S Laptops. Asus f52 Battery  http://www.freepressbox.com/news-asus-k40id-battery-acer-5742-adapter-155378.html 1.New asus f52 battery must be fully charged before use. 2.New battery pack needs to be fully charged and discharged (cycled) a few times before it can condition to full capacity. 3.Laptop battery undergo self-discharging when left unused. Always store a asus f52 battery pack in a fully charged stage for storage. 4.Fully drain and fully recharge your battery every few months. Asus f82 Battery  http://www.deal-battery.com/asus-f82.html , This replacement Asus f82 battery will get your laptop up and running the right way at the very best price. It is safe with overvoltage, shortcircuit and overcurrent protection. The battery for Asus f82 is sturdy and well built as it is made from the highest quality parts and first class worksmanship.The quality of this f82 battery is certified as well by TUV,RoHS and the CE to name a few. Spare 4400 Replacement Battery for Asus f82. There is no battery memory effect with a Lithium-Ion battery - you can charge the battery whenever you like without fear of reducing its charge capacity. Moreover, you do not need to drain a Lithium-Ion asus laptop battery completely before recharging it.