Adafruit Lithium Ion Coin Cell Charger

This special-purpose charger perfectly suits rechargeable LIR2450 Lithium Ion coin cells. Simply slide the coin cell in correctly and plug into any USB port for an effortless recharge.The charging process lasts about 3 hours, and you'll know it's complete when the green DONE LED lights up. Please note that the rechargeable coin cell is sold separately.Charging occurs in three stages: preconditioning, a constant-current 45mA fast charge, and a constant-voltage trickle charge for optimal battery maintenance.Exclusively for use with LIR2450 cells; avoid using with non-rechargeable Lithium coin batteries. Always supervise charging and avoid using damaged cells.