![]() It packs a pretty big punch.Īll these “different” sensors mean a lot of different possible uses! It can measure open/close, vibration, orientation, angle (tilt), and temperature. What’s great out the SmartThings Multipurpose Sensor is its versatility. I would only think about replacing the battery when it says “1%” remaining, or when it dies of course. In all likely-hood it has nearly 50% or more battery left. So all of this is to say, don’t worry about it if your sensor says it has “10% battery left”. This is because the battery readings measure voltage, which inherently fluctuates throughout the cell’s lifetime. ![]() SmartThings acknowledges this on their website: “ it’s not uncommon for battery levels to underestimate the life of a battery at 30-35% less than what it actually is“. Something else worth noting here is that the Multipurpose Sensor battery life percentage read-out is usually flat out wrong. ![]() So it makes sense that my bathroom door one died first. The other Multipurpose Sensor is simply being used on my basement door and rarely if ever triggers an alert (when the door is opened past 1 AM). For example – “turn on bathroom light on low when bathroom door is opened past 11 PM”. The one that died does have routines attached to it and gets used often. One of them died in 9 months and the other is stilling working, over a year later. I bought two of these sensors almost a year ago now. In my experience, this is just about right. SmartThings reports an average battery life of between 6-12 months for it’s Multipurpose Sensor. These batteries cost less than 10 bucks and have a mAh of 600! You can check the price on Amazon here. ![]() One great deal on CR-2450s is the EmazingLights 20 Pack on Amazon. Or if you have other electronics that use the same battery type. The CR-2450 holds its power for about ~8-10 years in storage, so if you’re able to get a deal on a pack of them I think it’s a good idea to buy in bulk.Įspecially if you use multiple SmartThings Multipurpose Sensors through-out your home, like I do. It’s not surprising then that the lower mAh CR-2450 batteries typically cost less than those CR-2450 batteries with a higher mAh. In general, the more mAh, the larger the battery capacity and longer the battery life. It is commonly used to measure the energy capacity of a battery. ![]() MAh means “milliamp hour” and is a unit that measures (electric) power over time. The CR-2450 typically has a rated capacity anywhere between 550 and 620 mAh. ![]()
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