5.0 out of 5 stars Great Product!

2026-01-10    -GY

This item is well-built and works great. Shortly after I received it, my neighbor had a dead battery and needed a jump start to get to the automotive store. Instead of using jumper cables, I used the Lifmocer GS300. It was simple to hook up and it started right away! I highly recommend this.

5.0 out of 5 stars Works as advertised

2026-01-06    -Jeffrey Dutill

Came charged and ready to use. Started my car right up. No complaints. Sweet flashlight as well and power bank for other emergency situations.

5.0 out of 5 stars Massive power in a tiny package!

2026-01-18    -JACJL

My Jeep Wrangler has had a parasitic draw that literally drains my battery overnight. I have had it in the shop so many times and they still have no IDEA what's causing it but I need my car until I can get it back in. So I bought this little box of magic jump starts so I no longer have to worry about having another vehicle jump starting it for me or being stuck somewhere without a working vehicle. Let me tell you this thing WORKS! Charge it, clamp it, and car starts right up from totally dead in seconds. I'm shocked at how easy it is to use (57 year old women who knows nada about car engines) and how quickly it works. It came fully charged and only dropped to about 85% after one jump and it's USB so you can charge in your car/home as needed but it holds a full charge for a long time (months) when not in use. I'm honestly amazed at how well this thing works! It also can be used as a power bank to charge other things, has a flashlight and is super portable and safe and easy to use. Buy it you won't regret it!

4.0 out of 5 stars Does the job

2026-01-24    -Night Owl

Nice Jump Pack for the Price. Comes with a nice carrying case. 12 watt output to charge devices. 14 watt charge rate.

5.0 out of 5 stars A tool every car should have!

2026-02-02    -Danimal

This jump box works great! I’ve only had it for a few months but I have used it 3 times- twice on my wife’s car (until I was able to replace the battery) and once on a friend’s car who also needed a new battery. It started the car easily all 3 times and still had over 85% power left on the box. It has a helpful, easy to read display and a handy storage case. It’s easy to use and sure beats dragging out the jumper cables and finding someone to help. I have purchased 2 more to give as Christmas gifts for friends and family. I don’t know how I’ve gone this long without this box. We’ll worth the investment!

5.0 out of 5 stars Great Product!

2026-01-03    -GY

This item is well-built and works great. Shortly after I received it, my neighbor had a dead battery and needed a jump start to get to the automotive store. Instead of using jumper cables, I used the Lifmocer GS300. It was simple to hook up and it started right away! I highly recommend this.

5.0 out of 5 stars A reliable well built unit jumper unit/power brick that comes in a nice storage case

2026-03-04    -DYC

I have been using this product for over two months. We have several old cars, with two over 25 years old. It was time to sell one of them, but it had a battery that was starting to go. Bought this new battery jumper as the one we didn't have the juice to start the car.The car's starter would instantly start when I used the Lifmocer. No weak starter turning, which tells me it's getting a healthy power stream. The unit itself is a little on the big size but still quite portable. I rather have the power for the jump than a smaller size. The whole unit fits in the included case. The quality of the clamps (copper) were good and included instructions are clear. The unit's LED tells me remaining power in percentage, so I know when to recharge. I have jumped the car multiple times and have plenty of power left.When I sold the car, I told all the potential buyers that the battery will need to be replaced. The car was sold, and I save money by buying the jumper versus replacing a car battery that now easily cost over $200. I can also use the unit as a USB charging brick or to power a light during a power outage. A nice unit to have in a household.

5.0 out of 5 stars Amazing product

2026-01-02    -Brittney Morrison

Simple to use and had long battery life. Has already got me out of sticky situations. I live in the frozen tundra in ND and it worked perfectly every time.

5.0 out of 5 stars A reliable well built unit jumper unit/power brick that comes in a nice storage case

2026-02-14    -DYC

I have been using this product for over two months. We have several old cars, with two over 25 years old. It was time to sell one of them, but it had a battery that was starting to go. Bought this new battery jumper as the one we didn't have the juice to start the car.The car's starter would instantly start when I used the Lifmocer. No weak starter turning, which tells me it's getting a healthy power stream. The unit itself is a little on the big size but still quite portable. I rather have the power for the jump than a smaller size. The whole unit fits in the included case. The quality of the clamps (copper) were good and included instructions are clear. The unit's LED tells me remaining power in percentage, so I know when to recharge. I have jumped the car multiple times and have plenty of power left.When I sold the car, I told all the potential buyers that the battery will need to be replaced. The car was sold, and I save money by buying the jumper versus replacing a car battery that now easily cost over $200. I can also use the unit as a USB charging brick or to power a light during a power outage. A nice unit to have in a household.

5.0 out of 5 stars Massive power in a tiny package!

2026-02-07    -JACJL

My Jeep Wrangler has had a parasitic draw that literally drains my battery overnight. I have had it in the shop so many times and they still have no IDEA what's causing it but I need my car until I can get it back in. So I bought this little box of magic jump starts so I no longer have to worry about having another vehicle jump starting it for me or being stuck somewhere without a working vehicle. Let me tell you this thing WORKS! Charge it, clamp it, and car starts right up from totally dead in seconds. I'm shocked at how easy it is to use (57 year old women who knows nada about car engines) and how quickly it works. It came fully charged and only dropped to about 85% after one jump and it's USB so you can charge in your car/home as needed but it holds a full charge for a long time (months) when not in use. I'm honestly amazed at how well this thing works! It also can be used as a power bank to charge other things, has a flashlight and is super portable and safe and easy to use. Buy it you won't regret it!