Can Duracell's kid-friendly batteries stop your cycling devices working? cycling
If you’ve got a low-power device that uses three-volt CR2032 coin batteries, check exactly where its connectors are before you buy these Duracells to power it.
Coin batteries are everywhere these days. 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. 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.
To deter kids from eating them, Duracell coats coin batteries with Bitrex. As the name suggests this is an extremely bitter-tasting chemical, denatonium benzoate. 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.
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Association between menstrual cycle length and covid-19 vaccination: global, retrospective cohort study of prospectively collected dataObjectives To identify whether covid-19 vaccines are associated with menstrual changes in order to address concerns about menstrual cycle disruptions after covid-19 vaccination. Design Global, retrospective cohort study of prospectively collected data. Setting International users of the menstrual cycle tracking application, Natural Cycles. Participants 19 622 individuals aged 18-45 years with cycle lengths of 24-38 days and consecutive data for at least three cycles before and one cycle after covid (vaccinated group; n=14 936), and those with at least four consecutive cycles over a similar time period (unvaccinated group; n=4686). Main outcome measures The mean change within individuals was assessed by vaccination group for cycle and menses length (mean of three cycles before vaccination to the cycles after first and second dose of vaccine and the subsequent cycle). Mixed effects models were used to estimate the adjusted difference in change in cycle and menses length between the vaccinated and unvaccinated. Results Most people (n=15 713; 80.08%) were younger than 35 years, from the UK (n=6222; 31.71%), US and Canada (28.59%), or Europe (33.55%). Two thirds (9929 (66.48%) of 14 936) of the vaccinated cohort received the Pfizer-BioNTech (BNT162b2) covid-19 vaccine, 17.46% (n=2608) received Moderna (mRNA-1273), 9.06% (n=1353) received Oxford-AstraZeneca (ChAdOx1 nCoV-19), and 1.89% (n=283) received Johnson & Johnson (Ad26.COV2.S). Individuals who were vaccinated had a less than one day adjusted increase in the length of their first and second vaccine cycles, compared with individuals who were not vaccinated (0.71 day increase (99.3% confidence interval 0.47 to 0.96) for first dose; 0.56 day increase (0.28 to 0.84) for second dose). The adjusted difference was larger in people who received two doses in a cycle (3.70 days increase (2.98 to 4.42)). One cycle after vaccination, cycle length was similar to before the vaccine in individuals who received one dose per cycle (
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