V7's high-quality replacement laptop batteries are made from the highest-quality cells available and incorporate all of the standard logic boards, thermal protectors, thermistors and circuit breakers to ensure maximum levels of safety, reliability and efficiency. V7's wide selection is compatible with top-line products from all major manufacturers and meets or exceeds original OEM specifications to provide longer-lasting quality. All replacement laptop batteries are not created equal. "Grade A" lithium cells from Panasonic and Samsung are all they use and, not surprisingly, it's all the original manufacturing brands put in their battery packs. Since the battery cells are the most important part of the battery pack, never settle for a cheap imitation product.