UC3SFL Suitable for 3.6V Li-Ion batteries only. 30 minute charge (1.5Ah battery). UC10SFL Suitable for 10.8V Li-Ion batteries only. 60 minute charge (1.5Ah battery). UC14YFA Suitable for 7.2 - 14.4V Li-Ion/NiMH/NiCd batteries. 30 minute charge (1.4Ah battery). UC18YRL Suitable for clip-on 7.2 - 18.0V Li-Ion/ NiMH/NiCd batteries. 20 minute charge (1.2Ah battery). 40 minute charge (2.6Ah battery). UC18YRSL Suitable for slide-on 14.4 - 18.0V Li-Ion batteries. 20 minute charge (1.2Ah battery). 40 minute charge (2.6Ah battery). UC24FYA Suitable for clip-on 7.2 - 24.0V Li-Ion/NiMH/NiCd batteries. 35 minute charge (1.3Ah battery). UC36YRL Suitable for slide-on 25.2 - 36.0V Li-Ion batteries. 60 minute charge (25.2V x 3.0Ah battery). 80 minute charge (36.0V x 2.6Ah battery).