All the battery powered devices seem to use either coin cell or some other less common battery type. Aside from size, is there any other practical reason why they avoid the common battery types where rechargeable options are plentiful?
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Batteries are the basics, but you can also use a rechargeable battery. This is the most convenient and common type.
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Unfortunately they offer way more battery life in way less space. With rechargeable AAA they would not be able to advertise sensors with 2 to 5 years battery life.
- One rechargeable AAA can deliver 1.2 V x 750 mAh = 900 mWh.
- One small CR2450 3 V x 600 mAh = 1800 mWh (two times the energy of one AAA).
- One CR123 3 V x 1550 mAh = 4650 mWh (five times the energy of one AAA).
However, I like IKEA strategy which now uses rechargeable AAA in all their sensors and buttons. They are larger and heavier of course, for wireless buttons it doesn’t matter, for that motion sensor in the corner maybe you prefer something less bulky.
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I prefer AA or AAA because I can recharge them… ThirdReality is in a good path on that…
Smaller sized devices.
Hello @BigMacCombo
CR batteries have proven themselves to be reliable and trouble-free. AA and AAA batteries require a redesign, and CR batteries were chosen due to their size and superior design.
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The most of brands have that phobia…
I prefer AA or AAA always.
ThirdReality do that well
Well and what about the smoke sensors?they use CR17450 witch let’s say on AliExpress are not so expensive but takes almost 2 weeks or my be more to get them and on EU if you find them cost like 17 euros more shipping at least is what I saw.the AA would bee even better for smoke detectors more if they are rechargeable as I doubt that an CR17450 will last 10 years will have to see but AA even if we need to charge them are less expensive even if they do not last 10 years but you can change them.the coin batteries I am fain with them as you can buy them from amazon and they are not expensive