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Ninja with DUO Auto-iQ BL642 Personal blender

This Ninja

  • 1500 watt personal blender was very good in overall performance, and has
    • touchpad controls
    • 3 cup capacity
    • 5 claimed speeds
    • and a full size blender attachment that is not sold separately
    • and the following accessories: full size blender not sold separately, lid.
    • dishwasher safe
    • a 1 yr warranty.


The Ninja with DUO Auto-iQ BL642 Personal is part of the Blender test program at Consumer Reports. In our lab tests, Blender models like the with DUO Auto-iQ BL642 Personal are rated on multiple criteria, such as those listed below.

Predicted reliability:

Owner satisfaction:

Icy drinks (Smoothies): Smoothness and thickness of non-alcoholic pina coladas are determined using assorted size sieves. Blenders that do well for icy drinks also do well for smoothies.


Accessories Accessories Additional items either found in box or on the model.
Full size blender not sold separately, lid
Full sized blender attachment Full sized blender attachment Comes with a full-sized blender attachment which is not sold separately.


Wattage Wattage How many watts each blender is. Some were converted from horse power or amps to watts.
Capacity Capacity Capacity of the blender jar in cups
Speeds Speeds The number of speed settings the model has.
Weight (lbs.) Weight Weight of the jar, lid and base.
Controls Controls Indicates the type of controls the blender has.
Jar weight (lbs.) Jar weight Weight of the jar and blade.
Dimensions Dimensions The footprint of the blender.
7 x 10