Li-ion battery:
Li-ion battery doesn't contain heavy metal, no pollution to the environment.
No memory effect, it can be charged or discharged as you want.
Li-ion battery's energy density is higher than Ni-CD battery, lighter than Ni-CD battery.

Specifications:
Voltage: 18V
Capacity: 2500mAh
Battery Type: Lithium-Ion

Compatible with:
HITACHI 18V battery, 330139, 330557, BSL1815X, BSL1815S, BSL1830.

Fit for:
HITACHI: Hitachi C 18DSL2, Hitachi C18DSLP4, Hitachi CJ 18DSLP4, Hitachi CR 18DSAL
Hitachi CR 18DSLP4, Hitachi DS 18DSAL, Hitachi DV 18DSFL , Hitachi FCG 18DAL, Hitachi FCG 18DL, Hitachi R 18DSL, Hitachi WM 18DBL

Note:
It's recommended that the battery should be fully charged and discharged 3 times after you receive the battery.
For transport safety, our batteries are not fully charged before leave the factory. After use, please charge the battery after cooling.
Battery charger is not included.