Capacity is measured in milliampere-hours (mAh). Many CR2032 batteries have between 190 and 225 mAh capacities. What does this mean? Essentially, a CR2032 with a 200 mAh capacity can deliver 200 milliamps of current for 1 hour. Or 400 for half an hour. Or 100 for 2 hours. And so on. Get the picture? If you go through a lot of CR2032 batteries, perhaps in LED flashlights or electronic projects, then you might want to buy them in bulk. If so, look no further than GP’s cheap and cheerful bundles. You can have 10 batteries for less than most manufacturers will sell you four, or 30 for around a tenner. Unsurprisingly, they’re not quite as long lasting as rival button cells; even by the nine hour mark our test cells were down to an average 2.91V. By 12 hours that had dropped to just 2.07V, with the LED in our reading light visibly dimmer. Third, and most important, these are batteries with staying power. At the nine hour mark they were level with the Duracells, still putting out 2.96V, but by 12 hours they were slightly ahead, at 2.41V. They don’t quite have the consistent output of the Varta cells and fall just behind the Panasonics, while the shelf life is eight years rather than ten. However, if you can’t get your hands on the Panasonic CR2032s, the Energizers are a great second choice. CR2032 battery dimensions are about 20mm x 3mm. Q: Do CR2032 batteries contain more toxic chemicals than other batteries? qualities really stand out in CR2032 batteries: reliability and lifetime. As one of our experts succinctly said, “I just want a [expletive] battery that I can forget about for a year.” Wouldn’t that be nice? We also looked at reliability; it doesn’t matter how long a battery’s supposed to last if it burns out before then. How We Tested

Lithium is harmful and environmentally costly but very widely used. The world’s growing problem with lithium batteries is well-documented. CR2032 batteries also use an array of other common battery materials like zinc and manganese dioxide. The charger indicates battery status with LED lights. Some users are skeptical about the charger. It’s important to note it’s possible to misuse the charger: putting regular CR2032s in it can cause a short circuit. Shelf Life — Passive discharge limits shelf life in batteries. CR2032 batteries generally discharge at about 1% per year. Under some conditions, the rate may be a little higher.A: Any lithium battery should be recycled at a battery/device drop-off location. To find one near you, go here. Lithium and other toxic battery chemicals leech out of punctured batteries in landfills, making their way into soils and waterways. Q: How long should a CR2032 battery last?

Interestingly, hemp batteries are non-toxic and have outperformed lithium batteries in tests. Just sayin’. Q: How do you dispose of CR2032 batteries properly?Testing watches, electronics, and general home gear gives us a consistent need for CR2032 batteries. As we’ve gone about finding and reviewing the best gear on the market, some of the best supporting tech has come to the surface. We’ve tested some of the longest lasting CR2032 batteries, as well as some of the cheaper entries. Who This is For Instead of churning through CR2032 batteries (dropping the dead ones off at an approved recycling center), try a rechargeable LIR2032. Be aware, there are a couple critical performance differences between the two. Leak-Proof Lithium-Ion Batteries — It’s very rare that fluids leak from a CR2032 battery, especially if it’s not damaged. Duracell’s CR2032 batteries promise to keep well on the shelf and perform solidly when installed. Though a few quality control issues seem to exist, they’re bound to pop up when you sell this many batteries. Duracell’s CR2032s are among the internet’s most popular.