fits Ego Power+ Garden Toolstemperature-control Battery 360° Airflow For Faster Charge Timeego Power+ Battery Realises The Best Of Arc Lithium Technology. This Battery Is As Effective In Performance As Petrol & Has A Design Encompassing The Latest Technology For Efficient Battery Cooling & Effective Temperature Control.cells Within The Ego Power+ Batteries Are Placed At The Correct Density For A Compact Battery But Without Overcrowding, Which Can Cause An Excess Build Up In Heat.this Battery Is Controlled By Intelligent Software, Microprocessors & An Internal Power Management System Allowing The Greatest Run Time Of Your Outdoor Power Toolsunique Ego Power+ Design Allows Battery To Be Placed On The Exterior Of Your Tools & Not The Interior So Your Cells Remain Cool & Work Efficiently. Smart Electronics Within The Battery Are Protected From Dust & Moisture By A Resin Coating & Shock-absorbing, Robust Case.your 4.0ah Battery Has A Charge Time Of 30 Minutes With The Ego Power+ Rapid Charger.your 4.0ah Battery Has A Charge Time Of 80 Minutes With The Ego Power+ Standard Charger.battery Weight: 2.2kg