This ACER replacement battery pack is a 4865mAh, 7.5, rechargeable, removable, Li-ion battery designed to work with ACER Chromebook Spin 311 CP311-3H-K2RJ. The Hi-Quality battery meets or exceeds original manufacturer specifications for the ACER Chromebook Spin 311 CP311-3H-K2RJ Laptop Battery in quality, durability, and performance. Li-ion batteries do not suffer from the memory effect. They generally last between 300-500 charge/discharge cycles. All laptop batteries are tested for 100% quality control assurance. This battery for ACER Chromebook Spin 311 CP311-3H-K2RJ includes a one year warranty. We offer a 30 day money back guarantee and fast shipping on all of our products.