Replacement battery fits 30 HP compatible models. Specifications: 200mAh, 3V, Li-ion. Compatible with: ECS 331, ECS Advent 3030, ECS Advent 7079, ECS Advent 7082, ECS Advent 7083, ECS Advent 7084 and 24 more compatible models. Replaces: HP 431436-001. HP replacement battery designed for CMOS/BIOS devices. Built to OEM specifications for reliable performance.