Overview:100% genuine Nokia product Model: BL-5 J High performance & high reliability lithium battery Perfect for replacing worn out Nokia batteries, giving your cell phone a fresh start Built-in safety & protective circuitries Recharges with regular Nokia battery / cell phone chargers Designed for the following Nokia cell phones: 5800 Specification: Dimension: 2.36 in x 1.5 in x 0.24 in Weight: 0.67 oz