








⚡ Stay charged, stay ready—power that fits in your pocket!
The Schumacher SL1638 is a compact, 800 peak amp lithium-ion jump starter designed for up to 6-cylinder vehicles. It delivers up to 15 jump starts per charge, doubles as a fast 2.4A USB power bank, and features a versatile LED emergency light. Lightweight and safety-focused with spark-free smart cables, it’s the ultimate portable power solution for professionals who demand reliability and convenience on the road.


| Brand | Schumacher Electric |
| Product Dimensions | 3.62"D x 5.04"W x 8.11"H |
| Amperage | 800 Amps |
| Peak Output Current | 800 Amps |
| Specification Met | UL |
| Manufacturer | Schumacher Electric |
| UPC | 026666816380 |
| Model | Schumacher Electric SL1638 Lithium Portable Power Pack and Jump Starter, 800 Amps, 12 Volt, |
| Item Weight | 1.81 pounds |
| Item model number | SL1638 |
| Exterior | Machined |
| Manufacturer Part Number | SL1638 |
Y**N
Packs a punch!
Schumacher is a brand you can trust. I've purchased Schumacher year's ago and the charger was very dependable. When it did finally breathe it's last breathe I purchased the jumper box which I was very happy with and last but not least this little miracle of a gadget. It kinda makes one laugh because you wouldn't believe how much power it has but it works every time. I just love this little Schumacher jump start gadget. I'll definitely keep coming back to Schumacher.
J**A
good purchase
Great product. Simple to use and very compact. I bought this primarily to go in my wifes Jeep, and for me to take on long distance motorcyle trips. It charges pretty quickly after the battery is low.
J**A
Good to have for emergencies
Have had the jump pack for about a year and have used it a couple times. Got the battery replaced in my car now so it just rides in the trunk for emergencies. One of those things you may only need once in five years, but it got us going when we needed it.
R**K
great jumper
i bought it for my motorcycle, it will work on cars as well, but i bought it to carry on my adventure biking trips, it has already saved me, i was testing my heated gear to see how much amperage i could pull from the stator without killing my battery, and i took it just a but too far, with full heat, heated grips, heated seat, high beams, aux lights and add on fog lights. when i stopped to get gas, my battery had dropped to 11.5 which during cranking went to 10.4 which is not enough to get the computer to turn on.. hooked up the jumper and it ripped right over.. also i can use it as a mobile 12v power bank to heat my heated riding gear away from the bike... and has usb charging ports for other stuff, and the led light is handy as well.. it will be great insurance when im in the middle of nowhere on the bike.
P**S
I now own 2
Performs as expected but very slow to charge.
D**S
Works great!
I bought this a couple of years ago and have never used it, until yesterday. I need a new car battery, but haven't had time. My battery will die if I don't drive the car every couple of days. I finally remembered that I have this, so charged it up and threw it in my car. Yesterday, my car wouldn't start, so I hooked this up (I keep it charged and it holds a charge for a very long time) and it worked like a charm. No more asking neighbors or strangers for a jump. Very glad I have it.
K**H
It was a great product, until I used it.
The first 5 or six times I used the jump box. It worked perfectly, couldn't of asked for a better product. Infact the jump box was so powerful it even cold started my New Holland 5610 tractor. I was amazed...I woke up one Saturday morning around 7ish , wanting to get some much need yard work done,. Being early spring. As I prepare my Cub Cadet lawnmower for the task of cutting knee high weeds, every stick, branch, child's toy or tree that will be in sight of the Barefoot family yard.. for the fortunate none North Carolinas. that's all the beautiful yards will grows the early spring of North Carolina.As I turned the ignition key to start, nothing happened. I quickly realized, "yes " the battle dead. No problem right. I have a new amazingly powerful jump box. I quickly applied the +'red' to the positive termamal. Same process to the negative. I firmly grabbed my trusty jump box and pressed the center button to activate the device. The center button became stuck.??? I was confused, I taped it softly, repeated the taping over and over again. Same result. I tried a small flat screwdriver to pry on the sides and edges of the button. My attempts were in vain. I slowly gave into the fact my new amazingly powerful, impressive and perfect in my eyes, had failed me so soon. I now shamefully avoid friends and family for the fear of my failure jump box will be brought up in conversation. I am taking the disappointment day by day trying to void it from my memory of the power I once could yield freely and boastful. As time slowly drags on , the one light that keeps me going is the one year warranty I have shamefully applied for. I often look back on the days I could laugh at week or dead batteries. My one hope for redemption is a lone email that was sent to a manufacturer name I dare not say. I will continue to attempt being strong through the trial of my future on cranking trucks, lawnmower and even tractors again some day.
M**N
Outstanding battery jump starter.
Fantastic. I bought it a couple of months ago and it was easy to charge and compact. I kept it in my trunk until two days ago when my battery died. It was easy to use and my car started on the first try. The charger still had 92% charge after the jump.
Trustpilot
1 month ago
1 month ago