Replacement battery fits 6 Acare compatible models. Specifications: 1700mAh, 3.7V, Li-ion. Compatible with: Pulse oximeter AH-MX, Biolight M800, Biolight Yonker YK-8000C, Bollywood M800, Bolate M800, Bolate LB-03. Replaces: Acare LB-03, Biolight 12-100-0002, Biolight LB-03, Bolate 12-100-0002, Bolate LB-03. Acare replacement battery designed for Medical devices. Designed for long-lasting power.