This is a generic, equivalent one, 100% compatible. This 4V Replacement Li-ion battery is designed to compatible with Milwaukee 2101-20 M4, 45242298150 M4, M4 1/4, M44V.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 4V
* Battery Capacity: 3000mAh
* 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:
Milwaukee: 48-11-2001, M4B2, 4932430098, 4002395377596

Compatible with the following Milwaukee Power Tools models:
Milwaukee: 2101-20 M4, 45242298150 M4, M4 1/4, M44V

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.