(Seriously, this thing has a wired sensor PocketLint reviewed it in 2004. Various lights and on-bike sensors all worked fine, as did a VDO bike computer I had kicking around from the late Iron Age. I could only replicate the problem with an Apple Airtag. To see how widespread the problem is, I bought a couple of Duracell CR2032s and tried them in various devices. Aha! I thought, that’ll be the Bitrex coating then. He subsequently found that a “cheap Tesco one worked”. The problem cropped up in a cycling context when Twitter user Tom Jones aka that he’d bought a Duracell CR2032 to power his 4iiii power meter but it didn’t work. Josh’s early Airtags needed new batteries, but he found the Duracells he bought just didn’t work. I first came across this problem in an article by Josh Centers on the TidBits email newsletter, which covers all things related to Apple devices. But the Bitrex coating on Duracells can stop them supplying enough power. The low internal resistance of lithium-chemistry coin batteries makes them ideal for these applications as your device can sip a tiny amount of current from them for a long time. However, anything used as a coating on a coin battery can reduce its ability to deliver electricity, and that might cause problems.ĭevices like heart rate monitors, power meters and the Apple Airtags many of us use as anti-theft devices don’t draw a lot of power. Props to Duracell for protecting young ’uns, then (for patenting the process so other battery makers can’t also make their coin batteries less attractive to kids, not so much). In fact, it’s the bitterest substance known to man, triggering no fewer than eight of your bitterness taste detectors and inspiring anyone with a working sense of taste to spit out whatever it’s coated with. As the name suggests this is an extremely bitter-tasting chemical, denatonium benzoate. To deter kids from eating them, Duracell coats coin batteries with Bitrex. Kids have died after ingesting coin batteries. This is not a health and safety gone mad, nanny state theoretical problem. Electricity from the battery reacts with bodily fluids to cause burns in the oesophagus or stomach which can be fatal. They’re easy for an inquisitive toddler to accidentally swallow, with dire consequences. Because they’re small and shiny, coin batteries are attractive to little kids when they’re at the stage of exploring the world by finding out how everything tastes. In cycling, they power tiny blinky lights, computers, electronic shifters, power meters, pressure gauges, heart rate monitors, and cadence and speed sensors, among other things.īut there’s a problem. You find them in car keys, kitchen scales, laser pointers, computer motherboards, calculators, electronic toys, bank card readers, watches, Apple Airtags and probably a load of other applications I haven’t thought of. It also lasts 10 years in storage, making it a CR 2032 battery that is hard to top.Coin batteries are everywhere these days. This CR 2032 battery also comes in child-safe packaging and is coated with a non-toxic, bitter-tasting coating to discourage children from putting the batteries in their mouths, making it a great choice for parents with small kids. The Duracell 2032 3-Volt Lithium Coin Battery features excellent battery life and is also one of the most dependable 3-volt batteries out there. Best Overall: Duracell 2032 3V Lithium Coin Battery Finally, the small size of CR 2032 batteries can create a choking risk for children, so if you have kids at home, finding an option with child-safe packaging or a child-safe bitter coating is a good idea. If you plan on storing your CR 2032 batteries, finding an option with a 10-year shelf life is a good idea for optimal results. Shelf life is another important factor, especially if you plan on storing your batteries for later use. Battery life is naturally a primary concern, and it may not be surprising that top name-brand CR 2032 batteries provide longer life than most budget and rechargeable options. There are plenty of factors to consider when looking for CR 2032 batteries. We made this guide to showcase the best CR 2032 batteries available on Amazon to simplify your search. However, there are many CR 2032 batteries on the market, with the overall quality and battery life varying widely among the options. Plenty of useful electronic devices, from garage door openers to key fobs, require CR 2032 batteries to operate.
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