Battery voltage: 3V. Battery capacity: 20mAh. Battery Type: Li-Ion. Material: Lithium vanadium pentoxide. Diameter: 20mm. Conditioning unit: 1. Function: Batterie de secours, faible décharge, 2% par an, rechargeable. Configuration: horizontal mounting with axial connections. Equivalents: VL2020-1HFE (old code). Dimensions: 20x2.7mm