Antigravity Batteries: 4650A Jump Starter – 12V Heavy Duty Lithium Battery Booster Pack, Portable Jump Box, for up to 10.0L Gas & 8.0L Diesel Engines

Great to carry in your vehicle for emergencies

When I needed a jump recently, the person who helped me out had an older version of this kit. I was so impressed, I immediately bought this newer bigger version. Very thankful I did, because my car battery died again, this time at 10 o’clock at night in a Boston parking lot. This new starter worked awesome and saved me at least an hour dealing with AAA. worth every penny. It is super easy to use and pretty portable. It’s about twice the size of the older version but it also has a lot more capacity. It needs periodic charging, so I just put a note in my calendar to do it every three months. I clearly need a new car battery, but until then this is essential. It’s probably also pretty useful for camping trips and power outages. Definitely read the entire user manual (which, bonus points, is written in easy to read English). There were lots of warnings about what not to do. Super fan.

Batteries don't give you any warning (like slow starting) anymore. Even if you have great road service, a half hour wait in the cold stinks! This has bailed me out a few times. It's even started my lawn tractor. It maintains charge really well so far. I've reduced my times when I check its charge to about quarterly and even then, it's always tested at 100%. If I'm going to leave the vehicle for an extended period, I still "top off" the charge before I leave.

Absolutely essential. It is small, compact, powerful, easy to charge and easy to use. I’d give it 20 stars!

Update: heard from customer support and they said that you can use a USB C wall phone charger! I used my USB C charger from my Samsung S25 Ultra. Took longer you top off battery from 77% when i got it to 100% about 2.5 hrs but it works! --------- I see what others say that there's no specifications on using anything other then the supplied lighter socket to USB C input port (can't see if i can use a standard USB C phone charger)? They really for the price should include the optional wall charger or at least list the input required to use another usb C charger. You can't use the wall charger from the older models which had a barrel style plug. Older model the case was much nicer and practical to get to the accessories

This thing is sick. It’s very small and light and looks cool and has great features comes with all the charging cables but all that aside it performs crazy good. I jump started my moms 09 c350 benz (H7 group size battery) that had been dead 2 months. Opened the box, jumper came charged at 76%, I connected to the battery and nothing happened at first (battery super dead) which means I got to try the reset feature which is the button next to power. Pressed it once, heard the car chirp to life, started her right up. 5 mins and done. Super easy to use, 2 buttons total on it. Very much worth the money and a huge upgrade from my old huge “briefcase” jump starter.

Best gift for ANYONE who owns a combustion engine. Absolutely life saver if you're alone, remote with a dead battery. Have one in every vehicle and my boat. Have easily purchased over 1/2 dozen for gifts to rave reviews.

Maybe I got a bad one. Since new it had trouble jump starting. It worked on slightly drained batteries so thought nothing of it. Until I purchased another model xp15. I noticed the xp30 did not have the power the lesser amp model had. Now the charge is stuck on 84% and won't charge, it won't go up or down. It's just past the one year warranty, maybe that's why customer service won't respond to any messages or emails. Don't need a free replacement. $195 paper weight.