Designed for the Samsung Q1 Ultra Mobile PC, this 6-cell Extended Life lithium-ion battery charges to 100% in 3.5 hours and lasts over 6 hours. Note: This product is only compatible with these Part Numbers; NP-Q1UA000, NP-Q1UAY01, NP-Q1U/000, NP-Q1U/001, NP-Q1U/600, NP-Q1U/SD1