Best Variable Voltage Batteries

AVID POWER 20V MAX Lithium lon Cordless Drill Set, Power Drill Kit with Battery and Charger, 3/8-Inch Keyless Chuck, Variable Speed, 16 Position and 22pcs Drill Bits (Red)

Worx WX240L 4V 3-Speed Cordless Screwdriver

DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Power Supply with Intelligent Charging Mode, 18W USB Interface, Precision Encoder Knob (White)

Bielmeier 20V MAX Cordless Drill Set – 285 In-lb Torque,2 Variable Speed,64+1 Position,3/8" Keyless Chuck,Drill Machine Includes 2 Brushes,Flex Shaft,Cloth Bag & 58 Drill Bits（Black）

NICE-POWER DC Power Supply Variable, 30V 30A 900W High Power Bench Power Supply with Encoder Knob, 4-Digit LED Display Lab Power Supply Adjustable Switching Regulated Power Supply Battery Charging

NICE-POWER DC Power Supply Variable 30V 10A, Adjustable Switching Regulated DC Bench Power Supply with Output Switch High Precision 4-Digit LED Display, Benchtop Lab Power Supplies with 5V/2A USB Port

NICE-POWER DC Power Supply Variable, 30V 30A 900W High Power Bench Power Supply for Battery Charging, Adjustable Switching Regulated Power Supply with Battery Charging Button, 3 Indicator Lights

DC Power Supply Variable,0-30 V / 0-10 A LW-K3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used for Spectrophotometer and lab Equipment Repair

Mellif Power Grease Gun Compatible with Milwaukee 18V Battery (Tool ONLY), 10,000 PSI, Brushless Motor, 5 Variable Speed, 14 OZ Capacity, 30" Hose, Built-in LED, Safety Lock, Low-Voltage Protection

Vastar 7.2V Cordless Screwdriver, Electric Power Screwdriver Set With Rechargeable Battery & Pivoting Handle, 320RPM/10+1 Torque Small Automatic Screw driver Kit with 47Pcs Bits/LED Front Light