Dimensions H x W x D: 112.35 x 51.65 x 23.4 mm Operational Time (approximately): 22/17 hours (Digital/Analogue – DP4000e Series) 17/12 hours (Digital/Analogue – DP4000 Series) Capacity: 2450mAh (Typical), 2300mAh (Minimum) Compatible with: DP4400, DP4400e, DP4600, DP4600e, DP4800, DP4800e Chemistry: Lithium Ion (Li-Ion) IMPRES batteries when used with an IMPRES charger provide automatic, adaptive reconditioning, end-of-life display, and other advanced features. Data is stored in the battery and communicated to the charger via a unique IMPRES communication protocol which is designed to maximize talk-time and optimize battery cycle life - all automatically.