The humble battery has been powering our gadgets for decades. Remote controls, toys, cameras, flashlights, clocks, keyboards, mice, game controllers, and many other devices require batteries. Having a few AA or AAA batteries in the house is always a good idea, but the single-use disposable alkaline batteries you’re probably thinking of are horribly wasteful and potentially hazardous. Rechargeable batteries are a more efficient alternative, and Panasonic’s Eneloop is my favorite.
I have been using AA and AAA Panasonic Eneloop batteries in all my devices for the past few years, and I can confidently say that they are the best batteries I’ve ever used. They hold a charge well, match or beat alkaline battery performance in most gadgets, and can be recharged many times without any noticeable dip in performance. They may seem pricey, but you save a lot in the long run by choosing rechargeable over disposable.
Most of us have a stack of depleted batteries in a drawer somewhere. We’ve all opened an old camera or forgotten gadget to discover a leaky battery. There’s a good chance the corrosive chemical (usually potassium hydroxide) that seeped out has damaged the battery terminals. Make the mistake of touching the white discharge and you’ll find it burns.
Several billion disposable alkaline batteries are sold annually, and far too many of them end up in landfills because it’s not profitable to recycle them. These batteries can release toxic chemicals into the environment as they degrade. They are the perfect symbol of the wasteful consumer age, and likely the kind of thing future generations will look back on with disgust.
While the EU and California class disposable batteries as hazardous waste, forbidding folks from throwing them in general trash, many states and countries lack clear guidelines. Most alkaline AA and AAA batteries contain steel, zinc, manganese, and potassium; rechargeable batteries are usually nickel metal hydride (NiMH). They still need to be disposed of carefully, but they are far less wasteful because you can recharge and reuse them several hundred times before they wear out.
Disposable batteries have always bothered me, but my wife and I amassed tons of them when our kids were small, as it seemed like everything they owned required AA batteries. I started using rechargeable batteries over a decade ago and have tried several brands. Cheaper options like Amazon Basics and ASDA’s rechargeable batteries seemed to damage easily. I often found the outer layer would peel away when I tried to remove them to recharge, and they rarely lasted more than a few months. Duracell and Energizer rechargeable batteries fared better, but nothing beats Panasonic’s Eneloop range for durability and reliability.
Incidentally, if you want to clear that drawer of old batteries, I have advice on how to responsibly dispose of electronics here. Folks in the US can find recycling locations for batteries through Call 2 Recycle or Earth 911. If you are in the UK, try your local recycling center or supermarket.
Developed by Sanyo in Japan, the original Eneloop range was launched in 2005. By the time Panasonic acquired the company in 2009, it had shipped more than 100 million units. The batteries weren’t officially rebranded as Panasonic Eneloop until 2013, a move that preceded global expansion. Still manufactured in Japan, Eneloop crossed the 500-million mark in 2019.
Early rechargeable batteries were poor at holding a charge. And instead of dying quickly, like an alkaline battery does when it’s running low, they supply a lower voltage for a while, which can lead to flaky performance, such as dimming lights. Rechargeable batteries are still not recommended for smoke alarms and emergency gear. You also can’t recharge them if there’s a power cut.
But the technology has improved over the years. Eneloop batteries outperform alkaline batteries in the cold (they work down to -20 degrees Celsius or -4 degrees Fahrenheit), and they can be recharged whenever you want (you don’t have to worry about the memory effect you get with some rechargeable batteries, which require you to only recharge them when empty).
The Eneloop range comes in three flavors of AA and AAA batteries. The standard Eneloop batteries have a 1,900- or 750-mAh capacity, can be recharged up to 2,100 times, and retain 70 percent of their capacity after 10 years in storage. The Eneloop Pro has a 2,500- or 930-mAh capacity, can be recharged up to 500 times, and retains 85 percent of its capacity after a year in storage. The Eneloop Lite has 950- or 550-mAh capacity, can be recharged up to 3,000 times and retains 70 percent of its capacity after five years in storage.
The highest-capacity Pro model matches or bests a single-use alkaline battery for most gadgets, including game controllers, toys, and torches. The standard Eneloop batteries perform close to the level of regular batteries, and the Lite version is best for low-power devices, like clocks. I use the Pro for game controllers and regular Eneloops with remote controls, and they are easily the longest-lasting rechargeable batteries I’ve tried. I also love that Eneloop batteries are packaged in cardboard (no plastic) and come already charged by solar panels.
Panasonic also offers a range of elegant chargers that can charge multiple batteries at different speeds. I bought the BQ-CC55 ($27), which plugs directly into the wall and can fully charge two AA batteries in just an hour and a half. It’s a smart, simple design with colored LEDs above each battery slot. Red means the battery is 20 percent or below, yellow is between 20 and 80 percent, and green is 80 percent and above. The light goes out when a battery is fully charged. It also flashes red if a battery is not inserted correctly and yellow when a battery nears the end of its useful life.
Folks may balk at the relatively high asking price of Eneloop batteries, but if you add up all the crappy batteries you bought at the dollar store, they cost you (and the planet) more in the long run. Buy your first batch with a charger and watch for discounts (they usually drop during big sale events, like Black Friday). Just make sure you buy the latest version, as the older ones have a lower capacity.
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November 09, 2023 at 08:00PM
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Panasonic Eneloop Rechargeable Batteries Are the Best - WIRED
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