does this have a "boost" button for dead battery?

Not that I'm aware of. Just connect the cables to the dead battery, wait a few seconds, and then start the car

Turn on meter it read 85% - turned on power and cycled through the lights did not get red safety light is there a trick to get red light?

When the green light on the jump cables is on, it indicates that they are connected properly. However, if the green light is blinking or off, it may mean that your car battery is either too low or completely dead. you can press the boost button, within 30 seconds, the green light will turn on and start your engine. If the red light turns on, it may indicate that you may have reversed the connection of the clamps. Double check the connection before attempting to start your vehicle.

How many times will it jump one one charge?

I used mine 4 times in one week and it only dropped 10% of charge.

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Specifications

Brand	VTOMAN
Product Dimensions	7.2"D x 3.5"W x 1.5"H
Item Weight	1.2 Pounds
Amperage	3000 Amps
Peak Output Current	3000 Amps
Manufacturer	VTOMAN
Model	V8
Item Weight	1.2 pounds
Country of Origin	China
Item model number	V8
Batteries	1 Lithium Polymer batteries required.
Exterior	Machined
Manufacturer Part Number	V8 PRO-JUMP STARTER-UK
Bulb Type	LED
Special Features	10 Advanced Safety Protections Jump Boxes, Super 3000A Peak Current Car Jump Starter, 12V/10A DC port can power for other car products, 24 Months Long Standby Time, Jump Box With Compass, Work From -4℉~140℉, 2 USB outputs (5V/9V)and (5V/2.1A), A Versatile Emergency Power, Jump Box with Jumper Cables LCD Display

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