100% OEM compatible. Keeping your laptop un-plugged and working longer is essential in today's business world. Axiom replacement batteries are manufactured using the highest quality components for long and reliable battery life. Meets or exceeds OEM laptop battery power specificationsGuaranteed Compatible - Our laptop batteries and power adapters are 100% compatible for your system-specific applicationHigher Environmental and Safety Protection - Each battery and power adapter product meets CE, FCC, and RoHS certificationsIC Board, Integrated components to protect against over heating, over-charging, over discharge, short-circuit and over voltage Lower cost when compared to OEM laptop batteries and AC adaptersHigh capacity and high quality LG & Samsung grade A cells utilized - ensures superior performance and longer battery lifeHigh quality superior casing for ultimate protectionUtilize environmentally sustainable -least levels of heavy metals in battery chemistriesAxiom products won't void your system warranty Compatibility: Dell - Latitude E5540 Dell - Latitude E5440 Dell - Latitude 5000 14 (E5440) 451-BBID-AX