TOPDON JS3000

Product Information

When it comes to power it delivers more than 1700 peak cranking amps, but the main thing is it started the (cold) engine every time. Supercapacitor jump starters : Instead of using a separate battery that you have to charge, supercapacitor-based jump starters use the weak charge from your vehicle (or other power source) to recharge the capacitors within the unit. The battery meter gives you the exact battery capacity this jump starter has and is easy to read in direct sunlight. It has the almost the same power (in real world testing) as the AVAPOW A28 but also has some other extra features like 60W USB-C charge out port.

It also has safety features like reverse polarity protection so if you ever connect it the wrong way to the battery terminals (like I did on purpose for testing this) it flashes the red light and won’t let you jump or damage anything in your car or your wallet. I like these features, but the more I think about them, the more I find them gimmicky and nothing else. Then in the next couple of days, I ran my jump start tests on different vehicles multiple times and measured the cranking amps provided by each jump starter.The lithium-cobalt battery has USB-C and USB-A ports to keep your phone and other electronics charging on long trips.

The Texas Department of Insurance recommends waiting two to three minutes between attempts if there is no cranking for five seconds. Most reviewers like this jump starter because of its easy-to-use design, sturdy feel, and reliable performance.

It is good enough for jump-starting a car with a weak battery but if you are in a situation where your battery is completely dead (under 2 volts) then this jump starter is not going to help you. For the best jump starter, make sure you purchase one with the appropriate power output for your vehicle.

The biggest downside to lithium-ion jump starters is they are generally less powerful and more expensive than lead versions with the same output. It has really strong metal clamps that don’t flex when clamped on the battery post and also has reverse polarity protection. The Topdon JS3000 has every single protection known to man, such as reverse polarity protection, surge protection, overload, spark, low and high-temperature protection, over-discharge, and over-voltage protection.In my testing, I found that this flashlight, I mean, jump starter, is best for gasoline engines (with weak batteries) that are up to 5.