Total Micro FN04 Notebook BatteryThe Total Micro FN04 Notebook Battery is designed for serious productivity, offering a reliable, high performance power solution for notebooks that require a proprietary FN04 form factor. Engineered to deliver consistent energy while keeping weight and heat in check, this battery balances runtime and portability so you can work longer between charges and travel with confidence. With a robust 41 Wh energy capacity and a practical 2800 mAh rating at 14.