AC-DC Adapter Replacement Bullseye Pro Max Review
You probably bought a Bullseye Pro Max digital tire inflator because you wanted accurate pressure readings and a fast fill. It’s a solid tool. But the moment the original AC adapter dies or gets lost, you’re stuck with a battery that slowly drains and no way to top it off without a 12V outlet.
That’s exactly why I started looking for a AC-DC Adapter Replacement for Bullseye Pro Max Digital Tire that actually works without overheating or cutting out after ten minutes.
After digging through aggregate user feedback and comparing specs across a handful of compatible adapters, one option kept showing up as the most straightforward replacement. It won’t make your inflator faster, but it will keep it running reliably. If you’ve got a dead charger or just want a backup unit for the workshop, this adapter is worth a look.
If you’re hoping for a universal solution that works with every brand of inflator, you’ll want to check the connector first. Let’s walk through the details.
What it is
The AC-DC Adapter Replacement for Bullseye Pro Max is a third-party power supply designed to replace the original charger that came with your Bullseye digital tire inflator. It outputs 11.1V DC at 1500mAh (or 2000mAh, depending on the batch), which matches the specs required by the 1745-BAT and 9475B-BAT battery packs. The adapter uses a standard 5.5mm x 2.1mm barrel plug with a center-positive polarity.
Brands like AstroAI and Viair sell similar chargers, but this one is specifically marketed for Bullseye models. It’s a no-frills replacement: just a wall wart, a cord, and a connector.
Setup & first impressions
The adapter arrives in a small plastic bag with minimal padding. Wall warts from third-party sellers often feel a bit hollow, and this one is no exception. The plastic shell is smooth but light, and the cord is about 4 feet long, which is average for this category.
Aggregate reviews from verified buyers mention that the barrel plug fits snugly into the Bullseye Pro Max charge port, but some users with older units report a slightly loose connection. The LED indicator on the adapter lights up green when plugged in. No manual is included, but you don’t really need one.
Just plug it into the wall, connect the barrel plug to the inflator, and the battery starts charging. The whole process takes about 3 to 4 hours for a full top-up, according to user reports.
| Output voltage | 11.1V DC |
| Output current | 1500mAh / 2000mAh (varies by batch) |
| Connector type | 5.5mm x 2.1mm barrel plug, center-positive |
| Compatible batteries | 1745-BAT, 9475B-BAT |
| Cord length | Approx. 4 feet (1.2 m) |
| LED indicator | Yes (green when powered) |
| Input voltage | 100-240V AC, 50/60Hz |
| Weight | ~3.5 oz (100 g) |
Daily-use experience
Charging performance
The adapter delivers the advertised 11.1V without any noticeable voltage drop during normal use. Verified buyer feedback across several platforms indicates that a completely drained 1745-BAT battery takes about 3.5 hours to reach full charge. That’s on par with the original Bullseye charger.
The adapter runs cool to the touch, even after a full cycle, which suggests the internal components are not being overstressed. However, a handful of users report that the charge rate slows down significantly after the first 30 minutes, which could indicate a lack of proper current regulation. Still, for topping off a partially used battery, it works fine.
Build quality and durability
The plastic casing feels a bit thin compared to the original adapter. If you drop it from a workbench, there’s a real chance the seam could split. Several Amazon reviews mention that the cord strain relief is minimal, and after a few months of regular use, the cable near the barrel plug can start to fray.
On the plus side, the barrel connector itself is metal and holds up well. The LED indicator is bright and easy to see, even in a dim garage. This charger is best suited for occasional home use, not for a professional shop where it gets tossed in a toolbox every day.
Compatibility and fit
The adapter is listed as a replacement for the Bullseye Pro Max digital tire inflator, as well as models like the 1745-BAT and 9475B-BAT. The barrel plug size is standard, so it might also work with other 11.1V inflators or devices that use a 5.5mm x 2.1mm center-positive DC jack. But we can’t guarantee that without testing.
Some users with older Bullseye units report that the plug fits a bit too loosely, causing intermittent charging. If you have a very early production inflator, you might need to wiggle the connector to maintain contact. In most cases, though, the fit is snug enough.
✓ Pros
- Direct replacement for Bullseye Pro Max inflator — no adapter hunting needed
- Affordable price point compared to buying a whole new inflator just for the charger
- Worldwide input voltage (100-240V) makes it travel-friendly with a simple plug adapter
- Runs cool during charging, no overheating issues reported in aggregate reviews
- LED indicator gives clear power status, helpful in low-light garages
✗ Cons
- Plastic shell feels cheap, prone to cracking if dropped — verified buyers report seam splits
- Short 4-foot cord limits placement; you may need an extension cord for a wall outlet across the garage
- Intermittent loose fit with some older Bullseye units, requiring manual adjustment to maintain contact
- No overcharge protection circuit confirmed by manufacturer specs — unplug after full charge to be safe
Who should buy it
Buy it if you…
You already own a Bullseye Pro Max inflator and the original charger died or got lost. This adapter is the cheapest way to get your inflator back to working order. You don’t need a fancy fast charger, just something that plugs into the wall and tops off the battery overnight.
If you’re a home mechanic who uses the inflator a few times a month for topping up tires on your Jeep Gladiator or your daily driver, this adapter will do the job without breaking the bank.
Skip it if you…
You work in a busy shop where tools get knocked around and cords get yanked. The thin plastic shell and short cord won’t hold up under daily abuse. You’re better off buying a genuine Bullseye replacement or a heavier-duty universal adapter with a longer cable.
Also skip this if you have a different inflator brand (like AstroAI or Slime) and you’re hoping it will fit, the barrel plug size is standard, but the voltage and polarity need to match exactly.
Better alternatives
If you want something more robust, consider the Bullseye OEM charger (if you can find it in stock), it’s the same quality as the original. For a universal option, the AstroAI 11.1V AC adapter has a slightly longer cord and a metal connector that holds up better, but it costs about the same. Another option is to buy a replacement battery kit that includes a charger, which might be a better value if your battery is also getting old.
Frequently Asked Questions (FAQ)
Does this adapter work with the Bullseye Pro Max digital tire inflator model 1745?
Yes, it is specifically designed for the 1745-BAT and 9475B-BAT battery packs used in the Bullseye Pro Max. The barrel plug and voltage rating match. If your inflator uses a different battery (like the older 1743 model), check the connector size before buying.
How long does it take to fully charge the battery?
From a completely drained battery, most users report around 3 to 4 hours. The adapter outputs 1500mAh or 2000mAh depending on the unit, so the charge time varies slightly. It’s not a fast charger, but it’s acceptable for overnight use.
Can I use this charger for other 11.1V devices?
Possibly, if the device uses a 5.5mm x 2.1mm barrel plug with center-positive polarity. But there’s no guarantee the current rating is safe for other electronics. Stick to using it with the Bullseye inflator unless you’re sure the voltage and current are within specs.
The plug feels loose in my inflator port. What should I do?
Some older Bullseye units have slightly worn charge ports. You can try gently bending the inner pin of the barrel plug outward for a tighter fit. If that doesn’t work, consider adding a small piece of electrical tape around the plug to create a snugger connection.
Is there an overcharge protection built in?
The manufacturer’s specifications do not explicitly mention overcharge protection. Verified buyer reports suggest that the adapter stops charging when the battery is full, but to be safe, unplug the charger once the battery is fully charged. Leaving it plugged in for days could reduce battery life.
What is the warranty on this adapter?
Most third-party sellers on Amazon offer a 30-day return window and a basic 30-day warranty. Some provide a 90-day replacement guarantee. Check the seller’s return policy before buying.
The adapter is not covered by Bullseye’s warranty.
Final verdict
Rating: 3.6 out of 5 stars
The AC-DC Adapter Replacement for Bullseye Pro Max is a straightforward, no-nonsense solution for anyone who needs to replace a lost or broken charger. It’s affordable, it delivers the correct voltage, and it gets the job done for occasional home use. The build quality is average, and the cord is short, but you can’t argue with the price.
If you’re a weekend warrior who keeps the inflator in the garage for topping off tires on your Jeep JK or the family SUV, this adapter is a smart buy. If you need a daily driver for a professional shop, look for something sturdier. For most people, it’s the right balance of cost and function.
Affiliate disclosure: This post contains affiliate links. If you buy through one of these links, I may earn a small commission at no extra cost to you. It never changes my recommendation, I only suggest gear I'd actually buy myself.
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