Black and Decker Start It Jump Starter Wont Charge Heres Why

If your Black and Decker Start It jump starter won’t charge, the issue is often a faulty power source, damaged charging cable, or depleted internal battery. Check the outlet, inspect the cable for frays, and ensure the unit isn’t completely drained—sometimes a reset or trickle charge can revive it. Persistent problems may indicate a defective battery or internal circuitry, requiring professional repair or replacement.

Key Takeaways

• Check the power source: Ensure the outlet or charger is working before blaming the device.
• Inspect cables and connections: Look for frays or loose plugs causing charging issues.
• Reset the jump starter: A simple reset may restore charging functionality.
• Avoid over-discharging: Recharge after use to prevent battery damage.
• Verify warranty status: Contact Black & Decker if under warranty for a free fix.

Why Your Black and Decker Start It Jump Starter Won’t Charge (And What You Can Do About It)

Imagine this: it’s a cold winter morning, your car won’t start, and you reach for your trusty Black and Decker Start It jump starter—only to find it’s dead. You plug it in, wait hours, but the charging light won’t turn on. Sound familiar? You’re not alone. Thousands of users have faced this frustrating issue, and it’s one of the most common complaints about portable jump starters. Whether you’ve owned your device for months or just picked it up, a jump starter that won’t charge can feel like a lifeline that’s suddenly cut. But before you toss it in the trash or blame yourself, take a breath. There are reasons this happens—and most of them are fixable.

The Black and Decker Start It jump starter won’t charge problem isn’t always a sign of a faulty unit. In fact, many cases stem from simple misunderstandings about how the device works, improper charging habits, or environmental factors. As someone who’s spent years troubleshooting portable power tools and jump starters (and even dealt with this exact issue in my own garage), I know how disheartening it can be. But here’s the good news: with a little detective work and some straightforward steps, you can often get your jump starter back up and running—without spending a dime on repairs or a replacement. In this guide, we’ll walk through the most common causes, how to diagnose them, and what you can do to fix or prevent the issue in the future.

Common Reasons Why Your Black and Decker Start It Won’t Charge

When your jump starter refuses to charge, it’s easy to assume the worst—like a dead battery or a defective unit. But more often than not, the root cause is something far simpler. Let’s break down the top reasons why your Black and Decker Start It jump starter won’t charge, so you can identify the culprit and take action.

1. Dead or Drained Battery (Even When It Seems Charged)

One of the most misunderstood aspects of jump starters is that they don’t hold a charge forever. Lithium-ion batteries—like the one in your Black and Decker Start It—naturally degrade over time, especially if left unused for weeks or months. Think of it like your phone: if you leave it unplugged for two months, it won’t turn on, even if it showed 100% when you last used it. The same goes for your jump starter.

• Example: I once had a jump starter that “worked” last winter. I stored it in my trunk and forgot about it. Come spring, I plugged it in, but the charging light stayed off. After testing with a multimeter, I found the battery voltage was below 2V—too low for the charger to detect.
• Tip: If your jump starter has been sitting idle for more than 3–6 months, it may be in “deep discharge” mode. This doesn’t mean it’s ruined, but it needs special care (more on that later).

2. Faulty or Incompatible Charger

Not all chargers are created equal. The Black and Decker Start It comes with a specific AC/DC adapter designed to match its charging circuit. Using a third-party charger—even one that looks identical—can lead to undercharging, overheating, or no charging at all.

• Red flags: The charger is warm to the touch, the jump starter doesn’t respond when plugged in, or the charging light flickers inconsistently.
• Pro tip: Always use the original charger. If you’ve lost it, order a replacement directly from Black and Decker or an authorized retailer. Avoid “universal” chargers unless they’re explicitly compatible.

3. Charging Port or Cable Damage

Over time, the charging port on your jump starter can get dirty, bent, or loose. The same goes for the charging cable—especially if it’s been coiled tightly, stepped on, or exposed to extreme temperatures.

• How to check: Gently wiggle the charger plug while it’s connected. If the charging light flickers or turns off, the connection is unstable.
• DIY fix: Use a can of compressed air to blow out dust from the port. For bent pins, use a small plastic toothpick (never metal) to realign them carefully.

4. Environmental Factors (Temperature Extremes)

Batteries hate extreme heat and cold. If your jump starter has been left in a freezing car or a hot garage, the battery chemistry can be disrupted, leading to charging failure.

• Rule of thumb: Lithium-ion batteries charge best between 50°F and 86°F (10°C–30°C). Below freezing, they may not accept a charge at all.
• Real-world scenario: A friend once left his jump starter in his truck overnight in December. When he tried to charge it the next day, nothing happened. He brought it inside, let it warm up for 2 hours, and it charged normally.

5. Internal Circuit Board or Battery Protection System

Modern jump starters have built-in protection systems that shut down charging if they detect issues like overheating, over-discharge, or short circuits. This is a safety feature, but it can be frustrating if it triggers unnecessarily.

• Signs of activation: The unit feels hot, makes a clicking sound when plugged in, or the charging light flashes rapidly (not steadily).
• What to do: Unplug the device, let it cool for 30 minutes, then try again. If it still doesn’t charge, the protection system may need a reset (see next section).

Step-by-Step Troubleshooting Guide

Now that you know the possible causes, let’s walk through a practical, step-by-step process to diagnose and fix the Black and Decker Start It jump starter won’t charge issue. Think of this as your personal repair roadmap—no technical skills required.

Step 1: Inspect the Charger and Cable

Start with the basics. Plug your charger into a wall outlet and check if the indicator light on the adapter turns on. If it doesn’t, the charger might be dead. Try a different outlet or a different charger (if you have one). Then, examine the cable for fraying, kinks, or exposed wires. A damaged cable is a common culprit.

• Quick test: Plug the charger into another device (like a phone or tablet) to confirm it’s working.
• Replacement tip: If the charger is faulty, contact Black and Decker support. Many models come with a 1–2 year warranty.

Step 2: Clean the Charging Port

Use a flashlight to inspect the port. Look for dust, lint, or corrosion. If you see debris, use a cotton swab dipped in rubbing alcohol (90%+) to gently clean it. Let it dry completely before reconnecting the charger.

• Caution: Never use water or harsh chemicals. Avoid metal tools—they can short the contacts.

Step 3: Check the Battery Voltage (Optional but Helpful)

If you have a multimeter, you can measure the battery voltage. Set the multimeter to DC voltage (20V range) and touch the probes to the charging port’s positive and negative terminals (refer to the user manual for pin layout).

• Normal range: 11V–13V when fully charged. Below 9V suggests deep discharge.
• No voltage: Could indicate a dead battery or internal fault.

Step 4: Try a “Trickle Charge” or “Jump Start” Method

If the battery is deeply discharged, the built-in charger may not detect it. In this case, you can try a “trickle charge” using a low-voltage power source.

• Method: Plug the charger in, then leave it connected for 24–48 hours. Some units need a long “wake-up” time to recognize the battery.
• Alternative: Use a 12V car battery to “jump” the jump starter. Connect the jump starter’s clamps to a running car battery for 5–10 minutes (positive to positive, negative to negative), then plug it into the charger. This can sometimes reset the protection circuit.
• Warning: Only attempt this if you’re comfortable with basic electrical work. Incorrect connections can damage the device.

Step 5: Reset the Protection Circuit (If Applicable)

Some Black and Decker models have a reset function. While there’s no universal reset button, you can try these tricks:

• Unplug the charger, press and hold the power button for 10–15 seconds, then plug it back in.
• Plug the charger in, wait 10 seconds, unplug, wait 10 seconds, then plug it back in. Repeat 3–5 times.
• Some users report success by connecting the jump starter to a powered-off car battery for 30 seconds before charging.

Step 6: Test in a Controlled Environment

Move the jump starter to a room-temperature area (70°F–75°F). Avoid charging it in direct sunlight, near heaters, or in damp basements. A stable environment improves charging success.

Preventing Future Charging Issues

Now that you’ve (hopefully) fixed the problem, let’s make sure it doesn’t happen again. Prevention is far easier—and cheaper—than repairs or replacements. Here’s how to keep your Black and Decker Start It jump starter ready when you need it.

1. Charge It Regularly (Even If You Don’t Use It)

Don’t wait until you need it to charge it. Lithium-ion batteries perform best when kept between 40% and 80% charge. For long-term storage, aim for 50%.

• Schedule: Charge every 3–4 months, even if you haven’t used it. Set a reminder on your phone or calendar.
• Real-life habit: I keep my jump starter on a shelf with a sticky note: “Charge in March, July, November.”

2. Store It Properly

Where you store your jump starter matters. Avoid extreme temperatures and humidity.

• Ideal spot: A cool, dry place like a garage shelf (not the trunk) or a closet.
• Never store: In a car during summer or winter. Temperatures can exceed 120°F or drop below -20°F.

3. Use the Right Charger (Always)

Third-party chargers might save you a few bucks, but they can shorten your device’s lifespan. Stick with the original or a certified replacement.

• Pro tip: Label your charger with tape (“For Jump Starter Only”) to avoid mix-ups.

4. Inspect Cables and Ports Monthly

Take 2 minutes each month to check the charging cable for damage and wipe the port with a dry cloth. Prevention beats repair.

5. Monitor Charging Time

Most Black and Decker Start It models take 4–6 hours to fully charge. If it’s taking longer (or not finishing), the battery may be aging. Replace it before it fails completely.

When to Replace vs. Repair Your Jump Starter

Not every charging issue can be fixed at home. Sometimes, the battery is truly dead, or the internal circuitry has failed. Here’s how to decide whether to repair, replace, or recycle.

Signs You Need a Replacement

• The jump starter won’t charge even after 48 hours of trickle charging.
• The battery swells, leaks, or emits a strange odor.
• The unit makes buzzing or crackling sounds when plugged in.
• It fails to jump-start a car even when fully charged (tested with a multimeter).

Repair Options (When Worth It)

If the issue is a faulty charger or damaged port, repairs can be cost-effective.

• Contact Black and Decker: Many units have a 1–2 year warranty. They may repair or replace it for free.
• Local repair shops: Some electronics or power tool specialists can replace the battery or port (cost: $30–$80).
• DIY battery replacement: If you’re handy, you can buy a compatible lithium-ion battery online and swap it yourself. Search for your model number + “battery replacement kit.”

Recycling and Disposal

Never throw a jump starter in the trash. Lithium-ion batteries are hazardous waste.

• Recycle at: Home Depot, Lowe’s, or Best Buy (they accept power tools and batteries).
• Check local rules: Some areas have battery drop-off events or hazardous waste facilities.

Data Table: Common Black and Decker Start It Models and Charging Specs

Model	Battery Type	Charging Time	Charger Voltage/Current	Warranty
BDJS400	Lithium-ion (12V)	4–6 hours	12V / 1A	1 year
BDJS600	Lithium-ion (12V)	5–7 hours	12V / 1.5A	2 years
BDJS800	Lithium-ion (12V)	6–8 hours	12V / 2A	2 years
BDJS1000	Lithium-ion (12V)	7–9 hours	12V / 2A	2 years

Note: Charging times vary based on battery level and ambient temperature. Always use the original charger.

Final Thoughts: Don’t Give Up on Your Jump Starter Yet

Dealing with a Black and Decker Start It jump starter won’t charge issue can be frustrating, but it’s rarely a death sentence for the device. More often than not, it’s a simple fix—like a dirty port, a dead charger, or a battery that just needs a little extra time to wake up. By following the troubleshooting steps in this guide, you’ll not only save money but also gain confidence in handling your tools like a pro.

Remember, the key to avoiding these problems is prevention. Charge your jump starter regularly, store it properly, and treat it with the care it deserves. After all, it’s not just a tool—it’s your backup plan when life throws a dead battery your way. And when you do run into issues, don’t panic. Take a breath, follow the steps, and give your device a chance to recover. More often than not, it will come back to life, ready to jump-start your car—and your day.

Frequently Asked Questions

Why won’t my Black and Decker Start It jump starter charge?

This is often due to a depleted internal battery, faulty charging cable, or issues with the power source. Try using a different outlet or USB cable to rule out connection problems.

How do I fix a Black and Decker Start It jump starter that won’t charge?

First, inspect the charging port for debris and test with an alternate adapter. If it still fails, the internal battery may need replacement by a certified technician.

Can a dead internal battery cause my jump starter to not charge?

Yes, if the internal lithium-ion battery is deeply discharged or degraded, it may prevent the device from holding a charge. This requires professional repair or battery replacement.

Why does my Black and Decker Start It show no LED lights when charging?

No LED activity usually indicates a connection issue, faulty charger, or a completely dead internal battery. Test with another charger or inspect the cable for damage.

How long should I charge my Black and Decker Start It jump starter before use?

For a fully depleted unit, charge it for at least 8–12 hours using the original adapter. If it still won’t charge after this period, there may be an internal fault.

Is it safe to leave my Black and Decker Start It charging overnight?

Yes, most models have overcharge protection, but avoid prolonged charging if the device shows signs of swelling or overheating. Unplug once fully charged to prolong battery life.