Powerextra 2 Piece 14.4v High Capacity 2000mAh Rechargeable Replacement Battery for Bosch 13614 13614-2G 15614 1661 1661K Highly compatible with your original power tool No memory effect, you can charge it anytime you want Self-discharge keeps battery cells active and ready for use Built-in memory chip memorizes the usage history and communicates with the charger The package includes two batteries and two pairs of gloves