WolfBox 4000A Peak Car Jump Starter, Portable 12V Battery Pack, Quick Charging, Emergency Booster for 10L Engines

As a woman traveling alone I feel much safer having this charger in my truck! It's a little bulky and heavy but I don't mind it! Flashlight is super brite and ratings on this brand is very good! Did I mention it sat in my box for 6 months and it held its battery to 100%

The Wolfbox 4000A car battery jump box paid for itself when I needed a jump a couple of weeks ago during the cold weather. Plus it has at least 10 more jumps left in it after this one. No need to recharge after every jump. They do recommend to charge it every 3 months. It's quick, simple, easy to do. Just attach the clamps, hit power then boost and start the car. Done. I am impressed.

Bought for the hubby on Christmas 2025. On Christmas we had flooding in our town so the power went out for FOUR days! This thing came fully charged out of the box. I charged my iPhone 4 times and hubby's 2 times. It was perfect and clearly a great meaningful gift.

I bought 2. One for my son and myself. Mine did not work from the start but was replaced very promptly without hesitation. My son's was 85% charged on receipt and said it was awesome. Fired up a full sized big rig! He said to make sure to read directions regarding the power boost.

I'm astounded. I live in the north. We've had several days when it did not make it above zero for highs. Lows would be around -15. The other night the windchill got down to -53. Needless to say my car didnt start. I purchased this item to jump start my car. AMAZING. My battery was very low. I had to use the "jump" button on the device. A green light lit up on the jumper. I hit the start button and BINGO! Started right off. I definitely rate the item 5 stars, more if I could. Couldn't be more happier.

was using a conventional booster charger with an AC compressor in weather under 40° degrees on my old exterior. In weather under 30° degrees that wouldn't even even start it. But this does first time every time. well worth the money and it is not that expensive compared to other boosters.

This thing started my Buick right up. Battery was completely dead and it cranked it right over. I used it straight out of the box. It had an 87% charge. I fully charged it from 60-100% in about 30 minutes. This thing charges fast.

i just got the wolfbox and the instructions were easy to follow. it is actually charging right now.

we needed this to start our tractor so we could scrape our driveway that was covered in snow. Worked first time using it! Tractor started, driveway scraped!

While I have not used this yet, it comes very highly recommended for our area of the country (upper Great Lakes) for holding charge and sustainability.