They are more compact, lightweight, quieter, quicker to set up than conventional fans, and there's no gas fumes. But which model of battery powered PPV fits your needs?
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Super Vac 18"
Run Time: 45 minutes (35 min. optional)
Weight: 46lbs. (21kg)
Batteries: Two DeWalt 12.0Ah (optional 9.0Ah)
Swappable Batteries: Yes
Blade Size: 18"
Output: 10,840 cfm
Shore Power Option: Yes
Body Material: Steel
Warranty: 5 years
Charge Time: 4.5 hrs (1.5hrs with Fast Charger)
Dimensions: 25.75"h x 25.75"w x 11.75"d (654mm x 654mm x 298mm)
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Super Vac 16"
Run Time: 35 minutes (45 min. optional)
Weight: 34lbs. (15kg)
Batteries: Two DeWalt 9.0Ah (optional 12.0Ah)
Swappable Batteries: Yes
Blade Size: 16"
Output: 9,200 cfm
Shore Power Option: Yes
Body Material: Steel
Warranty: 5 years
Charge Time: 4.5 hrs (1.5hrs with Fast Charger)
Dimensions: 23.75"h x 22.5"w x 11.75"d (603mm x 572mm x 298mm)

Leader BATFan 2 20
Run Time: 20 minutes
Weight: 50.7lbs (23.5kg)
Batteries: Proprietary NiMH
Swappable Batteries: No
Blade Size: 16.5"
Output: 9,420 cfm
Shore Power Option: Yes
Body Material: Plastic
Warranty: 2 years
Charge Time: 4 hrs
Dimensions: 21"h x 21.25"w x 10.6"d (530mm x 540mm x 270mm)

Leader BATFan 2 45
Run Time: 45 minutes
Weight: 57.3lbs. (26.5kg)
Batteries: Proprietary NiMH
Swappable Batteries: No
Blade Size: 16.5"
Output: 9,420 cfm
Shore Power Option: Yes
Body Material: Plastic
Warranty: 2 years
Charge Time: 7.2 hrs
Dimensions: 21"h x 21.25"w x 10.6"d (530mm x 540mm x 270mm)