Stanley Fatmax Jumper Box Not Working-Easy Fix! (2023)


How to open up and look for problems with your Stanley fat max jumper box


Hey youtube: it's vince here, hey! I looked on the internet for videos about trying to fix one of these stanley fat max jumper boxes.

I've had them for a couple of years, and performance has been okay and started to taper off and uh.

I said: well, maybe there's a way to like take it apart, replace the battery.

Something like that.

I love this thing because it's got its own charger here.

You just plug in an extension cord usb charging air compressor inside of it a little led, uh battery status and a little led light and an alternator check which I've never even used, but uh anyway hook up your cable, it's positive and negative, and it's got one of those polarity reversing things.

So you can't mess it up.

So I bought two of them and, like I said, the performance has not been uh up to par lately, so I opened it up and uh surprised to what I found.

So let me show you the top here.

Uh these two black pieces on the ends will come off they're like guards on the top.

It's a five millimeter hex that you uh undo four of these across here and then the bottom is just uh phillips screws.

So I'll pull these out and I'll show you what I found so the four hex screws uh come out pretty easy, uh nice looking little cap screw for the top on the bottom is where the other screws are that hold these two pieces on and also just hold the bottom cover on uh.

So some of them are quite deep.

You'll need a longer screwdriver uh phillips like this to get down in here and get these screws out and there's four screws here on the surface that take these two pieces here off so I'll go ahead and zip those off real, quick and show you how that works.

So I took it again.

I took the two or the four hex cap screws off at the top, and this just comes right off here.

The uh cable is just clipped into it.

I'm just going to leave it hanging off the side there, but it gives you access to the rest of this thing.

Let me get the other side off and now we've got uh about nine or ten phillips screws that are holding this case in, but again it's uh pretty easy to get to they're just phillips.

All of these screws are the same, except for one of course, and that one is right here: the hole is slightly smaller and the screw you'll see is slightly smaller.

So again, that's this hole right here, just remember where it's at mark it, if you need to for when you put it back together, so now get this this cover off and if you left any of them not fully unscrewed you'll find that out now I told you I like the features of this thing.

The build quality is not bad.

It's typical made in china stuff, but uh.

Now you can see inside this is the battery of course takes up most of the room.

Here's a little air compressor and I've used this thing.

I had a flat tire when I got back from a trip after three days in the parking lot plugged.

This hooked this thing up used the battery, ran the air compressor for about eight or ten minutes put 30 psi in it was a slow leak, so I drove home, took it to the tire shop, the next day, uh.

So anyway, here's what it looks like on the inside, but let me show you something else: okay, so took the back off of the stanley fat max power jumper, here's the battery obviously takes up most of the inside of it.

There's a little air compressor over here, and you know the unit's relatively new.

It's just not taking a charge, but once I opened into it started, taking a look.

These screws that hold the uh cables under the posts are actually loose.

The nut see that the nut is loose on both of these.

So I'm going to tighten this thing back up and hope that it'll uh it'll take a charge and uh give me some more life I'll.

Let you know all right so tightening these posts up maybe put a little thread locker on them, something like that to make sure they don't vibrate loose, because these ride around on our cars.

We have two of them: they ride around our cars, all the time that vibration might work those screws out uh after a while, but then putting it back together, make sure that this little black uh piece that covers the uh, the charger plug, is just kind of sitting there, and then it lines up with this little cutout right here in the uh, the back cover.

So that's really, the trickiest part is kind of getting that lined up and then oh by the way, take all the screws out.

A lot of them will want to stay in there uh, but trust me it's easier if you take them out and that way when you're putting them together, you know which ones don't have screws or which ones do they all have the screws removed and then also you got to kind of look through and line up the holes they don't line up perfectly again.

This is a plastic uh piece of gear made.

You know in china and, like I said, build quality is not horrible, it's pretty heavy and pretty solid, but of course it's not up to the standards of some tools.

You might be used to, but anyway, the other thing I wanted to tell you was there's actually two of these smaller screws, so there's like 10 of the full full-sized screws and there's two smaller screws and they go as you look at the label on the back in the bottom uh right, corner uh here and then underneath the uh, the handle that we're going to reattach.

So we'll zip the screws back in and should be ready to opt check.

It put it back in the vehicle and it's ready to assist with full charge all right.

All the phillips screws are in the bottom, there's the fourth hex screw in the top of the handles it's all back together and ready to go back in the trunk.

A couple of pro tips for you.

First of all, these things, you know, make us lazy and uh the problem with working with plastic metal screws in plastic.

With these things, is you can't strip them off? So don't be afraid to? You know, start them with the driver and then just use a good old-fashioned screwdriver.

So you don't get them too tight and strip.

That plastic in there, the other uh pro tip for you, is on the bottom of mine.

It was sliding around the trunk, and I got some of this heavy uh velcro and I just put the uh like the male side of it, four patches of that on here and uh.

Now it it sits, put and the trunk doesn't slide around when I'm hanging those curves and hitting the brakes and whatnot.

So anyway, again, the stanley fat max, like I said, a pretty good piece of gear uh when that battery does go out- and I know it only lasts three or four years I'll- probably try and find another battery the rest of the units, all functioning and just uh, replace the battery and keep using it uh anyway.

I hope this helps.

If you have problems with it, don't just throw it away, open it up and see if those cables are loose.

We'll see you next time.


Stanley Fatmax Jumper Box Not Working-Easy Fix!? ›

Used Fatmax several times worked perfectly to charge a car battery, mower battery, marine battery, battery for electric winch & gel motorcycle battery.

Can a Stanley Fatmax jump starter charge a battery? ›

Used Fatmax several times worked perfectly to charge a car battery, mower battery, marine battery, battery for electric winch & gel motorcycle battery.

How long does a Stanley Fatmax last? ›

Although the Fatmax retains charge up to 12 months without recharging, the instructions recommend recharging it every three months if it's not in use. The battery lasts around one hour on the highest setting and seven hours on the lowest setting.

Why does my Stanley Fatmax keep beeping? ›

This is the low battery indicator. … Our fatmax was charging a cell phone during a power outage and kept making a piercing beep…

Can a portable jump starter charge a dead battery? ›

Con: Jump Starters Don't Charge the Battery Fully

Jump starters don't have enough power to charge a battery completely. This means that if the battery is empty, a jump starter will provide enough power to turn your car on. But the battery itself will still have to be recharged using a different method.

Does a jump starter have to be fully charged to work? ›

Before using any portable jump starter, make sure that it's fully charged, and that all cords and plugs are in good condition.

How long does it take to charge a Stanley jump box? ›

Cable gauge6AC or DC
FeaturesAccessory Outlets, Reverse Polarity Protection, Safety SwitchAir Compressor, Work Light
Peak Amps100018 lb
Recharge time (min.)60018

What batteries are compatible with Stanley FatMax? ›

STANLEY Batería 18V Li-Ion 2Ah.

Can battery be too dead to jump? ›

One common reason why a car won't jump start is because the battery is completely dead. If the battery is completely dead, it won't have enough power to turn over the engine, even with a jump start. In this case, you'll need to replace the battery to get your car running again.

How do you test a battery jump box? ›

How can I test a portable battery jump-starter, to make sure it works? Disconnect the battery from the car and connect the car's battery cables to the jump starter. If it successfully starts the car, it's good. If not, it's bad.

How long do you leave jumper packs on battery? ›

Allow both vehicles to run connected for about three minutes. Leave the jump-started vehicle running and disconnect the cables in the reverse order that they were attached and close the hoods. Keep the jump-started vehicle's engine running for about a half hour to allow the battery to fully charge.

Why is my jump box beeping? ›

The Jump&Go will flash all 5 battery indicators simultaneously and provide an audible beep if the input charging voltage is too low or too high. To properly charge your Jump&Go with the Car Charger, the DC input voltage should be 13.6 to 16 volts (Vehicle charging system when vehicle engine is running).

What does continuous beeping mean? ›

One long, continuous beep generally means that there is a hardware problem – often memory related – that can prevent your computer from starting up at all. If you can't start your computer properly, you'll need to take a look at the physical hardware inside your machine.

Why is my jumper beeping? ›

The main alarm devices are for low battery level, overload on the inverter, or "reverse connection" alarm. Assuming that you've not connected the jumper cables to anything and aren't using the inverter, then the low charge seems the only possible issue.

Will a jump box work if the starter is bad? ›

A car's engine won't start if you jump-start it with a damaged starter motor. Jump-starting just increases the power of the battery. An auto transmission automobile cannot be pushed or towed started. However, a manual transmission car with a broken starter may.

Is a jump box better than jumper cables? ›

The most obvious advantage of a jump starter is the fact that it eliminates the need to find someone to loan their car to be used as a host vehicle, which is required when using booster cables. This advantage isn't just about the hassle of having to find someone willing to help you. It is also a safety consideration.

Do you need to replace a dead battery after jump-start? ›

Getting a new battery for your car is unnecessary since you have to jump-start it. A car battery can last long after being jump-started, but only if the alternator keeps it charged. If your battery is five years old or more, you should get a new one to prevent it from giving you trouble again and again.

How do I know if my jump starter is bad? ›

Signs of a Bad Starter
  1. A clicking sound can be heard when you turn the key.
  2. Turning the keys in the ignition won't start the vehicle, but the dash lights come on.
  3. When jump starting your vehicle, it does not turn over at all.
  4. The vehicle cranks slowly or may even turn over weakly.
Jul 2, 2019

Why is my jump starter not working? ›

Your car's ignition switch, alternator, battery, starter, or a fuse could be malfunctioning. Your safety switch could be broken. This switch keeps your transmission from starting unless you're in park or neutral. If it is malfunctioning, it will keep your car from starting.

Why don't you connect the negative when jumping a car? ›

Never connect the black cable to the negative (–) terminal on your dead battery. This is very dangerous, could result in a possible explosion. Make sure you follow the instructions in your owner's manual when jumpstarting your vehicle.

Are jump boxes already charged? ›

YES. It will be delivered partially charged. However, we highly recommend you fully charge your device before the first use. Note: The jump starter requires at least 20% battery power to start your car.

How long to leave a portable jump starter on? ›

Never crank the engine for more than five seconds as you may damage your vehicle's battery, the portable jump starter or even both. If your engine does not start the first time around, wait about a minute before attempting to crank your engine again.

How long does it take to fully charge a battery with jumper cables? ›

Once you've got the cables connected, jumpstarting your car should only take a few minutes. Like five minutes tops in normal cases and 30 minutes in extreme conditions. To fully recharge the battery, you must drive for at least 15 minutes after starting the vehicle.

How long do portable jump starters last? ›

1) Typically, a modern lithium battery's lifespan is 2–3 years, which is about 300 to 500 fully charge cycles as rated by manufacturers. 2) This doesn't mean that your jump starter will die or won't work after 2–3 years.

Are all Stanley FatMax batteries interchangeable? ›

The 18V Stanley FatMax V20 Cordless System batteries can be interchanged across your V20 power tools, using new and improved battery technology for longer runtime and power to get the job done.

Will a DeWalt battery fit a Stanley? ›

Stanley Dubuis, makers of the high-quality crimping and cutting tools that Total Connections distribute, are part of the Stanley Tools group, along with DeWalt. With both of these brands under the same umbrella, making the batteries interchangeable brings obvious advantages.

How do you jump start a totally dead battery? ›

Turn the ignition off on both cars. Connect the positive cable to positive terminals on both batteries. Connect the negative cable to the negative node of the functioning battery. Connect the other end of the negative cable to the ground on the dead battery.

When I try to jump my car it just clicks? ›

It might be a battery or alternator problem.

A rapid clicking noise when trying to start your car could mean there's something wrong within the electrical system. Perhaps your battery's dead, or your alternator, which charges the battery, isn't working correctly.

What happens if you try to jump a battery that isn't dead? ›

This process will put slight stress on your battery and alternator. However, in most cases, this process is harmless. A healthy battery will be unfazed by the jump-start, and your battery will recharge as you drive. However, If done improperly, jump-starting another car can pose some risks for your vehicle.

How do I know if my battery needs a jump or replacement? ›

Signs Your Battery Needs Replacing
  1. Difficulty Starting the Ignition/Turning Over the Engine. ...
  2. Dashboard Lights & Lighting Issues. ...
  3. Electrical Malfunctions. ...
  4. Poor Performance in Cold Weather. ...
  5. Strange Odor.
Nov 19, 2022

Will jumper cables fix a dead battery? ›

“When a vehicle battery dies, the most common solution is to jump-start the battery using jumper cables and another vehicle. However, if proper steps are not taken, there is no guarantee this method won't cause damage to the vehicle,” says David Bennett, AAA's manager for repair systems.

How many volts should a jump box have? ›

For cars with large engines, a jump start cable with a cross section of 25 mm is recommended. The vehicle which has suffered a breakdown must be supplied by a battery with the same voltage. Normally, the voltage of most vehicles is 12 Volts. Only a few vintage cars are operated with a voltage of 6 Volts.

Does revving the engine charge the battery faster? ›

The battery will charge faster if you rev the engine faster. Why? Because the faster the crankshaft turns, the faster it turns the belt that runs the alternator. And the faster the alternator turns, the more electricity it produces to run all the electrical stuff in the car — and recharge the battery.

Does revving help jump start? ›

Increasing the engine speed on the donor vehicle makes sure enough amperage (current) flows to the weak battery. Yes, it is helpful to rev the engine and hold it around 1,200 rpm.

Can you overcharge a jump box? ›

In those times where it is necessary to use the DC method, there are a few things to remember. The first is that the DC power port on your jump starter is a direct feed to the internal battery, so care must be taken not to overcharge the jump starter.

Can you leave a jump box on a battery? ›

If the charger does not have automatic charge termination then the answer depends on the current that the charger is pushing into the battery. If it is a low current charger, e.g. 2 amps then you are safe to leave it. If it is a high current charger, e.g. 20 amps, then you need to be more cautious.

Why is my car alarm going off when I jump my battery? ›

Ray: So when you hook up the jumper cables, it's like you're replacing the battery. Because the alarm's memory is intact, it picks up right where it left off, and it starts honking the horn and flashing the lights. It also immobilizes the engine so you can't start the car.

What is beeping every 30 seconds? ›

Beeps Once Every 30 Seconds or Minute

Most often, a single smoke alarm beep every 30 seconds or one-minute signals a low battery. It could also mean you put the batteries in the wrong direction or that the battery drawer is still partly open.

What is the code for 5 beeps? ›

5 Beeps - Processor Failure.

Why won't my jump box stop beeping? ›

A: Your starter needs to be recharged and the red insert for the alarm is out. Once you charge it, it should stop beeping and if you put the red insert back in in the front that should keep it from beeping. Hope this helps.

What could the most common causes of beep codes be? ›

Items that may cause a beep code include the following:
  • Motherboard battery failure.
  • CPU fan fault.
  • CPU fault.
  • RAM fault.
  • PCIe card, GPU, network card, etc.
  • Power supply fault.
  • Improper BIOS configuration.
  • BIOS or UEFI firmware corruption.

What does beeping instead of ringing mean? ›

This means that your phone handset and it currently has a beep alert tone activated instead of the ringtone.

Will my jump box charge a battery? ›

Unlike a charger, portable jump starters (aka battery boosters, emergency boosters, battery jumpers, and jump boxes) can be used anywhere. They don't need to be plugged into an outlet. They also don't re-charge your battery, but rather provide the necessary amperage to crank the engine and start the vehicle.

What's the difference between battery charger and jump starter? ›

While the battery chargers can only be used to charge car batteries, you can still use the Jump-Start power banks to charge other electrical devices, such as your smartphone, tablet, camera or laptop. Even larger consumers, such as car air compressors, can be supplied with power.

Does Hulkman jump starter charge battery? ›

NO, it CAN NOT. The HULKMAN Alpha jump starter is a jump starter, NOT a battery charger.

How long does it take a jump box to start a dead battery? ›

You should expect jumpstarting a dead battery to take five minutes, but in harsh conditions, it could take up to thirty minutes to jumpstart your car. You need to drive for at least fifteen minutes after a jumpstart to fully recharge the battery.

How do I know if my jump box is working? ›

How can I test a portable battery jump-starter, to make sure it works? Disconnect the battery from the car and connect the car's battery cables to the jump starter. If it successfully starts the car, it's good. If not, it's bad.

Do you jump starter negative or positive first? ›

Attach the red jumper cables first. Start by clamping one red cable to the positive side of the battery that won't start. Then attach the other red clamp to the positive side of the working battery. Next, clamp one black cable to the negative side of the working battery.

Is it better to jump or charge a dead battery? ›

For example, if you leave your headlights on overnight, it might drain even a new car battery. However, a simple jump-start will be enough to get you going. As you drive, your healthy battery will regain and keep this charge. Conversely, once a battery has gone bad, it will require a battery replacement service.

How long does a jump box last? ›

Jump Starters Require Charging and Don't Last Long

Even when you take good care of your jump starter, it is likely only to last about three or four years. However, quality jumper cables can last a lifetime, and will certainly outlast the lifespan of your car. Not to mention, they are much cheaper.

How long does a jump box need to charge? ›

The Jump Starter needs an initial charge of 24 to 48 hours.

How long does a jump box hold its charge? ›

A: A car jump starter usually holds its charge for as long as 18 months if it is powered off. Q: Does the battery size of the car jump starter matter?

Are STANLEY FatMax good? ›

Yes, Stanley Fatmax tools are excellent because they're trustworthy, durable, safe, and forged in high-quality. Also, there's a wide range of innovative tools to pick from Fatmax. I'll tell you why Stanley Fatmax tools are a must-have if you have a garage or just a toolbox based on my experience.

How accurate is a STANLEY FatMax? ›

The FatMax 72 in. non-magnetic level has an accuracy of 0.0005 in. / in. The MaxEdge cover the vial for a smooth consistent level surface. A 1-piece of aluminum is used in this levels construction.

Top Articles
Latest Posts
Article information

Author: Jamar Nader

Last Updated: 06/12/2023

Views: 5255

Rating: 4.4 / 5 (55 voted)

Reviews: 94% of readers found this page helpful

Author information

Name: Jamar Nader

Birthday: 1995-02-28

Address: Apt. 536 6162 Reichel Greens, Port Zackaryside, CT 22682-9804

Phone: +9958384818317

Job: IT Representative

Hobby: Scrapbooking, Hiking, Hunting, Kite flying, Blacksmithing, Video gaming, Foraging

Introduction: My name is Jamar Nader, I am a fine, shiny, colorful, bright, nice, perfect, curious person who loves writing and wants to share my knowledge and understanding with you.