jump starter instructions

I recently bought a standalone, battery-powered jump starter. Days before it arrived, the seller sent instructions, so I take it they are important. Heaven forbid I print them out. Also, I wanted to filter what was least obvious or what I hadn't already accounted for.

First, my "cheat sheet," then the raw email from the seller.

The precise email

Here is the raw email:


Bella from Amazon store Nova Tech US here.Thanks for purchasing DBPOWER Jump Starter from us. We sincerely hope this product will bring your life more convenience.

DBPOWER [Ultra Compact] 300A Peak 8000mAh Portable Car Jump Starter (Only for Gas Engine up to 2.5L) Auto Battery Booster Charger Portable Phone Charg

The package is already on the way to you. We sincerely hope you can have an excellent shopping experience from us. So we are sending you this email to make sure you can use it safely and properly. We hope you can read it carefully before using because all misuses may cause damage to your device and vehicle, or even danger to you.


1. Don't jump-start any petrol engine exceeding 2.5L, or any diesel engine.  
2. Don't crank the engine for more than 3 seconds. Allow the jump starter to cool down for at least 1 minute after each jump-start.
3. Your jump starter will perform best when it is fully charged. If less than 50% charged, it may not be able to start your engine.
4. It is highly recommended to charge the device with a wall plug to get the fastest charging speed (The kit doesn't contain a wall plug but a universal cellphone wall charging plug is compatible).
5. Please fully charge the device before using for the first time and recharge it at least once every three months to prolong its life span.
6. Please ensure the LED indicator on the clamps is solid green once everything is connected before attempting to jump start. If it flashes red and green alternately, just long press the boost button near the indicator for 3 seconds and it will turn solid green.
7. If the instructions have been followed correctly but your vehicle doesn't start instantly, please wait for 5-10 minutes and try again.
8. If you want to recharge the device after a jump start, please wait for at least 30 minutes.
9. Please clear up the dust on the electrodes of your car battery before jump starting.
10. Do not connect the positive and negative polarities together when it's turned on.
11. Separate the cables from the jump starter when they are not being used.

Meanwhile, if you have any doubt about your order, please contact me first. Simply reply this email and it will be sent to us automatically. I promise that any problem will be handled timely and properly. Your support means a lot.

Thanks A Million!

Yours sincerely,
Customer Service Manager
Nova Tech US

more info

Amazon link to the jump starter. I got it for $30 on May 14, 2019.

I believe it was 75% charged when I got it. It took several hours to fully charge.

I have not needed to do a jump start, but I plugged it up to my car battery to confirm that I got a solid green light on the cable attachment (as opposed to the jumper battery). I could hear a clicking every 2 seconds or so, probably from a coil / capacitor. As I remember, the light flashes back and forth green-red when the cables are attached to the jumper batter but not the car battery.