This is a generic, equivalent one, 100% compatible. This 18V 4000mAh Replacement Li-ion battery is designed to compatible with Hitachi BSL1825, BSL1840, BSL1850.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 18V
* Battery Capacity: 4000mAh
* Dimension: 116.05 x 74.00 x 67.80 mm
* Weight: 686.10 g
* Chemistry: Li-ion
* Condition: new, 1 Year Warranty!
* It is easy to use, convenient to carry with.
* No memory effect, Integrated microchip prevents overcharging & lengthens battery life.

Compatible Part Numbers:
BSL1825, BSL1840, BSL1850

Compatible with the following Hitachi Power Tools models:
For Hitachi Cordless Drills, Drivers, and Wrenches:
DH18DSL, DS18DBL, DS18DSFL, DS18DSAL, DS18DSL, DV18DBL, DV18DBEL, DV18DSDL, DV18DSFL, DV18DSL, KC18DHL,WH18DBAL2, WH18DBEL, WH18DBDL, WH18DDL, WH18DSAL, WH18DSL, WM18DBL, WR18DBDL, WR18DBAL2, WR18DSDL, WR18DSHL

For Hitachi Cordless Flashlights: UB18DAL, UB18DSL, UB18DGL, UB18DDL, UB18DEL
For Hitachi Cordless Jigsaws, Circular and Reciprocating Saws:
C18DSL, C18DSL2, C18DSLP4, CJ18DSL, CJ18DSLP4, CR18DSAL, CR18DSLP4, CR18DSL

For Hitachi Brush Cutters / Grass Trimmers: CG18DSDL, FCG18DAL, FCG18DL
For Hitachi Stud Cutters: CL18DSL
For Hitachi Angle Grinders: G18DSL
For Hitachi Nail Guns and Staplers: NP18DSL, N18DSL
For Hitachi Cordless Vacuums: R18DSL
For Hitachi Cordless Blowers: RB18DSL
For Hitachi Mini Tools: CV18DBL

NOTE:
1.The battery must be FULLY charged before first use.
2. The battery is stored in a cool and dry place.
3. Do not Separation, extrusion, and impact.
4. Do not put battery into water and fire.
5. Keep away from children.