Dell RC107 battery This is a brand new Dell Inspiron 640m replacement battery. There are two things you need to look for when buying a new computer battery: the quality of the lithium-ion power cells inside the battery cartridge, and the quality of the computer chip in the battery pack. All of our batteries come with the highest quality components, not the cheapest. This battery contains the very best Li-ion cells on the market from Samsung. We are a US based business with knowledgeable support staff to assist you before and after the sale. YES, we have a phone number and real people answer your call! Free technical support is available if you need additional help in diagnosing power problems with your battery, ac power adapter or battery meter software. All our products carry a full 2 Year warranty and every battery is charged and tested before it ships. We provide a 30 day money back guarantee if you are not completely satisfied. We are so confident in the quality of our batteries, we will pay for any and all shipping expenses if our product fails to perform in the first 30 days you have our battery, even if it is not our fault. Tech Specs Xtend brand; 10.8 Volts - also compatible with 11.1 Volt systems; 5200 mAh or 58 Whr; also compatible with 4400 & 4800 mAh batteries; 6 Cell Li-ion (12 cell available here); Samsung (South Korea); Black; 2 Year Warranty; 30 day full satisfaction guarantee; 300-500 recharge cycles; You can expect about 4 -5 hours of run time with this Dell RC107 battery when new, depending on your energy use.
If you are looking for even longer battery run times, check out our extended run battery for your HP laptop (our DELL-640mXT). Replaces these many Dell Inspiron 640m laptop battery part numbers: 312-0451 451-10284 C9553 CC154 CC156 DC224 DC226 FC140 HJ588 MJ365 PP19L RC107 Y9943