"When Oura unveiled its fourth-generation smart ring last October, its eight-day battery life was a major draw for those upgrading from the Oura Ring 3. But a year after its release, it seems like that eight-day battery claim is weakening. Reddit users on the r/ouraring forum report that their smart rings aren't holding a charge, only lasting a few days before dying. Others say that the battery is completely shot and unrevivable."
"These battery shortages are coupled with more frequent battery notifications introduced in recent updates. The app now tells users when their smart ring will run out. I've seen my battery percentage hit a little over 50%, prompting the battery button to turn orange and signaling me to charge the device. 'The thing will literally be at like 20% and send me a 'critically low battery' notification like it's about to flatline lmao. Meanwhile I'm getting another full day out of it easy,' writes."
"In an email to ZDNET, Oura addressed the reason behind the reported battery life issues, explaining that the smart rings use lithium-ion batteries, which chemically age over time to reduce maximum battery capacity. Performance varies depending on the smart ring's age"
Oura Ring 4 launched with an advertised eight-day battery life, attracting upgraders from the Ring 3. A year later, many users report substantially reduced runtimes, often two to three days between charges, with some devices reportedly failing completely. Firmware updates added more frequent battery notifications that sometimes warn prematurely, such as 'critically low battery' alerts while devices still last another day. Users report charge cycles falling from around five days to every other day in some cases. Oura explained that the rings use lithium-ion batteries that chemically age over time, reducing maximum capacity, and that performance varies by device age.
Read at ZDNET
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