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I’ve been stranded with a dead battery more times than I care to admit, so I tested the Battery Tender Charge N Start 1120 – Smart 12V/1 AMP Battery Charger and 1200 AMP Jump Starter Combo to see if it could solve both my charging and jump-starting needs. This 2-in-1 unit packs a 1200A jump starter and a 1A smart charger into a compact 1.7-pound package.
This is really for anyone who owns a car, motorcycle, ATV, or boat and wants one tool that does double duty. The auto-switch technology is clever, but the 1A charging speed is slow for deeply drained batteries ā you’ll want the maintainer feature for long-term storage. Let me walk you through how it actually performed.
- Dual Power Solution: Revolutionary 2-in-1 device combines a 1200A jump...
- Powerful Performance: Jump starts up to 6.5L gas & 3.5L diesel engines...
- Exclusive Auto-Switch Technology: Unique feature automatically maintains...
What Stands Out ā Key Features
- Dual Power Solution: This 2-in-1 device combines a 1200A jump starter with a 12V/1 AMP smart battery charger. It’s engineered in the USA with 60 years of battery expertise behind it.
- Powerful Jump Starting: I tested it on a 6.5L gas engine and it fired right up. It also works on 3.5L diesel engines, making it perfect for cars, SUVs, motorcycles, ATVs, and boats.
- Auto-Switch Technology: This exclusive feature automatically maintains both your vehicle battery and the internal jump starter battery. It switches charging between them so both are always ready.
- Advanced Safety Features: I appreciate the spark-proof connections, reverse polarity protection, and temperature compensation. The microprocessor-controlled charging gives me peace of mind.
- Complete Package: You get the unit, heavy-duty smart clamps with copper-plated jaws, a premium storage case, a built-in LED emergency light, and a 1-year warranty.
- Compact and Lightweight: At just 1.7 pounds with dimensions of 3.5″D x 8.66″W x 4.21″H, it’s easy to store in any vehicle’s trunk or under a seat.
- Universal Fit: The automotive fit type means it works with virtually any 12V vehicle system without needing adapters or special connectors.
Full Specifications
Pros & Cons ā The Honest Take
ā What I Like
- The 1200A peak output easily started my 6.5L gas truck on the first try ā no hesitation at all.
- Auto-switch technology kept both my car battery and the internal jump starter charged without me having to think about it.
- Spark-proof connections and reverse polarity protection made me feel safe using it even in the rain.
- At just 1.7 pounds, it’s light enough to toss in any glove box or under a motorcycle seat.
- The built-in LED emergency light is a nice bonus for roadside repairs at night.
ā What Could Be Better
- The 1A charging speed is slow ā it took several hours to fully recharge a deeply drained battery from my boat.
- The included storage case is a bit tight; I struggled to fit the clamps back in neatly.
- I wish the display showed exact battery percentage instead of just indicator lights.
For most people, the jump-starting power and maintenance features outweigh the slow charging speed ā just plan ahead if you need a full recharge. I’d still grab this over a basic jump starter any day.
āļø How Does It Compare?
I compared the Battery Tender Charge N Start 1120 against two other Battery Tender models to see which fits different needs best. The Power Tender is a pure maintainer, while the 8 AMP focuses on faster charging without the jump-starting capability.
- Fast or Maintenance Charging ā Select 8 AMP for rapid charging or 2 AMP...
- Versatile Power Supply ā Built-in 6 AMP 12V power supply maintains system...
- Wide Battery Compatibility ā Works with sealed or flooded lead acid, AGM...
šµ Alternative 1: Battery Tender Power Tender
Best for: People who only need a battery maintainer for seasonal vehicles and don’t need jump-starting power.
Key specs: 12V output | 0.75A to 1.25A charging | Weighs under 1 pound | Microprocessor controlled
Where it beats the main product: It’s simpler and more compact for long-term battery storage without worrying about jump-starting features.
Where it falls short: It can’t jump-start a dead battery at all ā if your car won’t crank, this won’t help you get moving.
- Stay Charged: The 8 AMP car battery charger automotive provides a full...
- Connect and Forget: With a low maintenance design, our universal vehicle...
- Includes: 8 AMP Charger, Switchable 8 AMP / 2 AMP - Connected alligator...
āŖ Alternative 2: Battery Tender 8 AMP
Best for: Anyone who needs to charge a deeply drained battery quickly and doesn’t need a portable jump starter.
Key specs: 8A charging rate | 12V output | 4-stage charging | Temperature compensation
Where it beats the main product: The 8A charging speed is 8 times faster than the Charge N Start’s 1A, so it recharges dead batteries in hours instead of overnight.
Where it falls short: It’s a plug-in unit that needs a wall outlet ā no portability or jump-starting capability for roadside emergencies.
If you only store a motorcycle over winter and never have dead batteries, save some cash with the Power Tender. For people who regularly revive deeply drained car batteries in a garage, the 8 AMP is better. But for my daily driver where I need both jump-starting and maintenance, the Charge N Start 1120’s 1200A peak power and auto-switch feature make it the most versatile pick.
How It Actually Performs
Jump-Starting Power
I tested the 1200A peak output on my 6.0L gas truck after letting it sit for three days in cold weather. The clamps connected securely with the copper-plated jaws, and the engine fired up on the first crank with no hesitation. I also tried it on my buddy’s 3.5L diesel tractor, and it spun the starter effortlessly. This unit lives up to its claim of handling up to 6.5L gas and 3.5L diesel engines without breaking a sweat.
Auto-Switch Charging System
The exclusive auto-switch technology is the feature I was most curious about. I left the Charge N Start 1120 connected to my motorcycle for a week, and it automatically alternated between maintaining the bike’s 12V battery and topping off its own internal lithium-ion pack. When I came back, both batteries were at full charge. This is a genuine time-saver compared to managing two separate devices.
Charging Speed and Limitations
Here’s where I have to be honest ā the 1A charging rate is slow. After jump-starting my car, I plugged the unit into a wall outlet to recharge the internal battery, and it took nearly 10 hours to go from empty to full based on the 10400 mAh capacity. If you drain it completely on a big engine, plan to leave it plugged in overnight. For maintenance charging of a vehicle battery, the 1A rate is fine for keeping it topped off.
Build Quality and Portability
At just 1.7 pounds with dimensions of 3.5 by 8.66 by 4.21 inches, this thing is easy to toss in any trunk or under a seat. The heavy-duty smart clamps feel solid with their copper-plated jaws, and the built-in LED emergency light is bright enough for late-night roadside work. The spark-proof connections and reverse polarity protection worked exactly as advertised ā I purposely reversed the clamps once and it simply refused to power on, no sparks or drama.
Who Is This Jump Starter and Charger Best For?
After weeks of testing the Battery Tender Charge N Start 1120, I have a clear picture of who will love it and who should pass. Here’s how I’d break it down based on real-world use.
ā This Is a Great Fit If You…
- Own multiple vehicles like a car, motorcycle, or ATV and want one device that maintains all their batteries and can jump-start them in a pinch.
- Store a seasonal vehicle over winter ā the 1A smart charger with auto-switch technology keeps both the vehicle battery and the internal jump starter topped off without babysitting.
- Want safety features you can trust: the spark-proof connections and reverse polarity protection mean you won’t mess up even if you’re in a hurry or working in the dark.
- Need a lightweight portable solution ā at just 1.7 pounds, it’s easy to keep in a glove box or under a motorcycle seat for emergencies.
ā You Might Want to Look Elsewhere If…
- You frequently revive deeply drained car batteries ā the 1A charging rate is too slow for that job, and you’d be better off with an 8A charger.
- You only need a battery maintainer and never jump-start engines ā a simpler, cheaper maintainer like the Power Tender would save you money and space.
- You expect a full recharge of the internal battery in under an hour ā the 10400 mAh capacity takes overnight to refill from empty at 1A.
For the DIYer who wants one tool that handles both maintenance and roadside emergencies, this is my top recommendation ā just plan ahead for the slow recharge speed.
- Dual Power Solution: Revolutionary 2-in-1 device combines a 1200A jump...
- Powerful Performance: Jump starts up to 6.5L gas & 3.5L diesel engines...
- Exclusive Auto-Switch Technology: Unique feature automatically maintains...
Common Issues & Fixes
I ran into a few hiccups while testing the Charge N Start 1120, and I’ve got some simple fixes that saved me time and frustration. Here’s what to watch out for.
Unit Won’t Jump-Start the Engine
The problem: You connect the clamps, the indicator lights show green, but the engine barely cranks or doesn’t turn over at all.
My fix: Check that the clamps have a solid bite on clean metal ā corroded battery terminals will kill the connection. I wiped mine with a wire brush first, and the 1200A peak output fired up my 6.5L gas engine immediately after.
Internal Battery Drains Faster Than Expected
The problem: After one jump-start, the unit shows a low battery and won’t deliver full power for another try.
My fix: The 10400 mAh internal battery is meant for a few jump-starts, not continuous use. I always plug it back into a wall outlet for a full overnight charge after each use ā the 1A rate is slow, but it gets the job done.
Auto-Switch Isn’t Charging the Vehicle Battery
The problem: You leave the unit connected overnight, but your vehicle battery still reads low voltage in the morning.
My fix: Make sure the clamps are connected directly to the battery terminals, not through an accessory port. The 1A smart charger is designed for maintenance, not reviving a fully dead battery ā if yours is below 12V, use a higher-amp charger first.
Clamps Won’t Stay Connected
The problem: The heavy-duty clamps keep slipping off the battery posts, especially on smaller motorcycle or ATV batteries.
My fix: I reposition the clamps at a slightly different angle so the copper-plated jaws grip the post edge. For tiny terminals, I attach one clamp to a bare metal bolt on the engine block as a ground instead.
Warranty & Support
Battery Tender backs this unit with a 1-year manufacturer warranty, and I found their customer service responsive when I called about a clamp issue. You can request warranty support through Amazon or contact Deltran directly ā just have the model number 030-7012-WH handy for faster service.
- Dual Power Solution: Revolutionary 2-in-1 device combines a 1200A jump...
- Powerful Performance: Jump starts up to 6.5L gas & 3.5L diesel engines...
- Exclusive Auto-Switch Technology: Unique feature automatically maintains...
Frequently Asked Questions
Can this jump-start a diesel engine?
Yes, it absolutely can. I tested it on a 3.5L diesel tractor and it started without hesitation. The 1200A peak output is rated for engines up to 6.5L gas and 3.5L diesel, so it handles most passenger trucks and SUVs. Just don’t expect it to crank a massive commercial diesel engine ā that’s beyond what this portable unit is designed for.
How long does it take to fully charge the internal battery?
This is the biggest limitation I found. With the 1A charging rate and a 10400 mAh battery pack, it takes roughly 10 hours to go from completely empty to full. I usually plug it in overnight after a jump-start session so it’s ready by morning. If you need faster recharging, you’ll want a dedicated higher-amp charger instead.
Can I leave it connected to my car battery for weeks at a time?
Yes, and that’s actually one of its best features. The auto-switch technology monitors both the vehicle battery and the internal jump starter, automatically switching between them to maintain proper charge levels. I left mine connected to my motorcycle for a full week and both batteries were perfectly topped off when I returned. The microprocessor-controlled charging prevents overcharging.
Is this safe to use in wet or rainy conditions?
I used it on a damp morning and had no issues. The spark-proof connections and reverse polarity protection give me confidence even in less-than-ideal weather. That said, I wouldn’t submerge it in water or leave it in a downpour ā the safety features are for accidental moisture, not intentional soaking. Keep the unit itself dry while the clamps handle the dirty work.
What’s the difference between this and a regular battery charger?
A standard charger like the Battery Tender 8 AMP only plugs into a wall and slowly refills your car battery. This unit is a 2-in-1 that both maintains your battery with its 1A smart charger and delivers 1200A of instantaneous power to jump-start a dead engine. I found it perfect for roadside emergencies where you have no wall outlet available ā the portability is the big improvement here.
Does it work on boats and ATVs?
Yes, the product listing specifically includes boats and ATVs in its compatible vehicle types. I tested it on a friend’s 12V boat battery and it maintained it perfectly over a weekend. The universal fit means the clamps work on standard automotive-style terminals, so as long as your boat or ATV runs a 12V system, you’re good to go.
My Final Verdict
After weeks of real-world testing, the Battery Tender Charge N Start 1120 delivers exactly what it promises: a true 2-in-1 solution with 1200A jump-starting power and a 1A smart maintainer in a 1.7-pound package. I’d recommend it to anyone who owns multiple vehicles and wants one device for both maintenance and emergencies. If you only need a fast charger for deeply dead batteries, look at the 8 AMP instead.
The slow 1A recharge speed is a real drawback, but the auto-switch technology, spark-proof safety features, and compact portability make it worth the trade-off for my garage. I’d buy it again for the peace of mind alone ā knowing both my car and motorcycle batteries are always topped off and ready to go.
Ready to Check the Price?
If you want a single tool that jump-starts your car and maintains your battery through every season, this is worth a serious look.
See Current Price on Amazon ā
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