How I check, test, and charge my AA and AAA batteries – and sift out defective ones


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pros and cons

Pros

  • Simple to use.
  • It has plenty of techy features to please the geeks.
  • It does a very good job of sorting out batteries that can’t or shouldn’t be charged.
Cons

  • It is expensive.
  • It takes up a fair bit of desk space.
  • It can be a little noisy in use.

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Olight is a name that’s been synonymous with quality flashlights for a number of years. I’ve owned more than a few Olights in my time, and they have been high performers that have far surpassed my already high expectations.

Also: I tried a unviersal battery tester from Amazon, and it’s already saving me money

So, when I got the chance to get my hands on Olight’s new AA/AAA battery charger — the Olight Ostation 2 Pro — I jumped at it. After all, if it was anywhere near as good as its flashlights, it was going to be excellent.

And it was.

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The Ostation 2 Pro is a beast

The Ostation 2 Pro (there’s also a standard version that omits some of the features) is quite hefty as chargers go, and it has quite a desk presence. It features a modern, all-plastic construction that’s both tough and stylish.

Also: The best rechargeable batteries of 2026

On the front is a 2.8-inch touchscreen for real-time monitoring of battery cycles, health, and status, which really adds to the high-tech, geeky feel of the unit.

I like the touchscreen on the Ostation 2 Pro.

I like the touchscreen on the Ostation 2 Pro.

Adrian Kingsley-Hughes/ZDNET

The charger is powered by a 12V/1.5A PD 3.0 USB-C input for faster charging under full load (a small wall charger is included), and there’s an app available (iOS and Android) for those who want to dive deeper into the details than the display offers.

The app offers a deeper dive into charging.

The app offers a deeper dive into charging.

Adrian Kingsley-Hughes/ZDNET

What can you charge?

The Ostation 2 Pro can handle any brand of AA and AAA Ni-MH batteries, as well as Olight’s own Ostation 1.5V AA rechargeable Li-ion batteries (Olight doesn’t yet have any Li-ion batteries in AAA size).

I quite like Olight's own AA Ni-MH batteries.

I quite like Olight’s own AA Ni-MH batteries.

Adrian Kingsley-Hughes/ZDNET

However, be aware that it won’t charge random Li-ion batteries because the charger uses a secure handshake protocol to communicate with Ostation batteries for maximum Li-ion charging safety.

It’s just so easy to use!

Once it’s plugged in and switched on (and I recommend downloading the app to check for any firmware updates), it’s easy to use.

Also: This charger made alkaline batteries completely unnecessary for me in 2026

Yup, assume everything needs a software update nowadays.

Yup, assume everything needs a software update nowadays.

Adrian Kingsley-Hughes/ZDNET

You load batteries into the top (it can take a dozen AAs and another dozen AAAs), and then the Ostation 2 Pro checks, tests, and charges them. Freshly charged batteries appear in the appropriate drawer at the bottom of the unit over the course of the day (an AA battery takes about 2.5 hours to fully charge).

My batteries making their way through the Ostation 2 Pro.

My batteries making their way through the Ostation 2 Pro.

Adrian Kingsley-Hughes/ZDNET

The unit can charge four batteries at a time (two AAs and two AAAs).

Also: I bought a thermal camera for my Android and it spotted a hidden hazard right away

Any batteries that fail to charge, are defective, or are alkaline batteries that shouldn’t be recharged end up in a separate drawer.

And it all just works. I’ve loaded it with all sorts of AA and AAA batteries — Olight Li-ion batteries, random Ni-MH batteries, defective rechargeable batteries, and even a sprinkling of unrechargeable alkaline batteries — and the unit performed perfectly, charging all the rechargeable batteries and rejecting all the ones that couldn’t or shouldn’t be charged.

The Ostation 2 Pro forces me to be tidy!

The Ostation 2 Pro forces me to be tidy!

Adrian Kingsley-Hughes/ZDNET

No fuss whatsoever!

There’s a hidden secret for Olight fans

On the side of the unit is a flap that hides two magnetic charging (MCC) ports that can be used to charge compatible Olight flashlights (the Baton, Warrior, Seeker, Marauder Mini, Arkfeld/ArkPro, and Perun 2 series of flashlights).

Since I have a few Olight flashlights, the MCC ports are a nice touch!

Since I have a few Olight flashlights, the MCC ports are a nice touch!

Adrian Kingsley-Hughes/ZDNET

ZDNET’s buying advice

What I really like about the Ostation 2 Pro is just how easy it is to use. Yes, I love the touchscreen and the deeper dive that the app offers, but it’s the simplicity that is the real winning bit for me. There’s no need to load batteries into some spring-loaded contraption, no need to remember to check on them every few hours, and no need to worry that someone might load the wrong batteries into the charger. I love the simplicity of just piling discharged batteries into the top and pulling charged ones out of the drawer at the bottom.

Also: Should you still buy rechargeable batteries in 2026? These USB-C ones say yes

It’s super easy and super convenient, and it makes it super hard for the user to mess something up.

Last mention of the productThe Olight Ostation 2 Pro retails for $140 for the charging unit alone, or $200 for the charger and 24 Olight Ni-MH batteries (which is a good deal). It’s a superb charger, but if you want a cheaper option, the Ostation 2 (which replaces the touchscreen with an LED display, uses a slower 5.0V/2.0A USB-C charger, and doesn’t include the magnetic charging ports for Olight flashlights) is priced at $100 for the charger alone and $160 if you want the 24 batteries.





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Michelin is a French multinational company that many consumers consider to be one of the most satisfying major tire brands. This firm makes several tire models that offer comfort, performance, all-terrain prowess, and everything in between — including cutting-edge products like the $42,000-per-set Michelin Pilot Sport PAX that it developed specifically for the Bugatti Veyron. Aside from its own tires, Michelin also owns other tire brands that you might be familiar with, including BFGoodrich, Achilles, and Corsa.

While tires are what Michelin is known for, the company has put its name to more than the rubber that wraps around your car’s rims. In fact, the company sells several other products that aren’t tires. So, we’re listing a few Michelin-branded items that you can buy online and in retail stores. While they might not all be made of rubber or even related to vehicles, these tools and accessories can come in handy when keeping your car — and even yourself — in good shape.

Michelin tire inflator

Since Michelin is primarily known for its tires, it makes sense for the company to sell a Michelin-branded tire inflator as well. That way, if you get a flat on one of the Michelin tires on your car or want to regularly top up your car’s tire pressure to maintain optimum performance, you can use a Michelin-branded pump to fill up your tires. The company actually sells several types of inflators on its Amazon page, but it only offers a single motorized unit — the Michelin Micro Tyre Inflator, which is available on Amazon for $98.99.

This little device is only slightly wider than an iPhone 17 and weighs about 400 grams, or 14 ounces. This means it’s easy to store in your car and to move to whichever tire needs topping up. More importantly, it takes power from a 12-volt socket, allowing you to run it using your car’s battery. It also has a USB port for charging your phone (or any other USB device) in case of an emergency.

Some users say that the device is slow, taking about 12 minutes to bring a tire from 10 to 32 PSI, but that’s not unexpected given its small size. Still, it should be good enough for regular weekly maintenance if you know your car’s proper tire pressure, or in case of an emergency. Its biggest downside is that you need a power source to run it, but having a dead battery and a flat tire simultaneously is likely a rare occurrence in many modern cars.

Michelin mini fridge

Taking a road trip during the summer can get you thirsty, and there’s no better way to quench that thirst than by drinking a cool can of soda (or your beverage of choice). If you want to ensure that you’ll always have a cold drink ready while you’re driving on the freeway, Michelin’s mini fridge will help you with that. This nifty little refrigerator is available on Amazon for just $99.99 and can be connected to either 110V AC or 12V DC power, ensuring that it will work on both your desk and in your car.

The mini fridge measures 6.9 x 9.45 x 10 inches (17.5 x 24 x 25.4 cm), meaning it can easily fit on a garage shelf or office desk. It should also be small enough to put on the floor of your car. Despite that relatively small size, it’s large enough to fit six 350-ml cans or four 500-ml bottles, and it will keep these items at a chilly 32 degrees Fahrenheit or 18 degrees Celsius. It also has an LED light on the door, so it can double as a night light if necessary.

Aside from keeping your drinks (and other food items) below room temperature, it also has a few other creature comforts. These include a removable shelf and door basket for flexibility and easy cleaning, as well as a retractable carry handle and a self-locking door to make transportation easier.

Michelin car floor mats

Heavy-duty car floor mats are often made from rubber for durability and water resistance, and since Michelin is in the business of rubber, it makes sense for the company to offer exactly that. So, if you want to protect your vehicle’s floor from dirt, dust, and mud, the company can help you with its Michelin all-weather car floor mats. This four-piece package is available on Amazon for $49.99 and comes in either black or tan.

The surface of these floor mats is specially designed to trap debris, snow, and water, preventing them from ruining the carpet on your vehicle. The mats have a cleat backing that grips your car’s floor and prevents them from slipping. The front row mats also come with what Michelin calls a Gripclip Retention System, allowing them to clip into your vehicle’s safety clips and adding even more reassurance that they won’t accidentally slip while you’re driving and pose a hazard to your safety.

These mats are universal and will work in most vehicles. However, they’re also easy to customize: If you find them a bit too large for the footwell of your tiny hatchback, you can use a pair of scissors to trim the edges for a perfect fit.

Michelin Stealth Ultra wiper blades

While Michelin’s Stealth Ultra wiper blades aren’t generally considered among the best windshield wipers, they appear to be a pretty good choice given their four-star rating on Amazon. These wipers cost $49.99 and are available in various size combinations for all sorts of cars. This ensures that no matter what vehicle you’re driving, you can probably find a set that will fit your needs.

These Michelin wipers are curved to conform to the shape of your windscreen for a clean, streak-free wipe. The company’s Amazon listing claims that these are designed to “withstand rain, wind, snow, mud, dust, or any other debris that might hamper your windshield’s visibility.” While you might think that windshield wipers are pretty simple items, and that you can just purchase any generic wipers off the internet, you must remember that they’re essential so that you have the best visibility possible during inclement weather. So, for your safety, consider investing in a set from a reputable brand like Michelin.

Michelin work boots

Michelin is known for making rubber tires to put on your car’s “feet,” but did you know it also makes shoes for the driver’s feet? The company makes sports & outdoor footwear, as well as shoes for work and safety. For this example, we have the Michelin HydroEdge Steel Toe waterproof work boot, listed for $210 on Amazon and at Georgia Boot. This shoe is available in U.S. sizes from 7.5 up to 14, ensuring that no matter what size you wear, you can get a Michelin work boot for yourself.

As the name suggests, this pair of shoes has steel toes to protect your feet from accidental impacts and is fully waterproof to help keep your feet dry, even in supposedly severe conditions. It also meets ASTM F2413 standards for electrical protection, meaning it has fully insulating soles to protect you from electrical hazards at work. Michelin also added what it calls an Advanced Rear Suspension system to its heel, ensuring proper shock absorption when you walk.





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