Electronics > Projects, Designs, and Technical Stuff
Shock proof coin cell holder for DS3231M
Simon:
I'd like to include a coin cell in my project. This needs to be a decent capacity so i was thinking CR2450. But the available holders don't look like they will hold the battery if the board is up on its side. The product will go vertical in a vehicle so i am not sure about the battery staying in.
I am using this for backup to a DS3231M so am I going over the top and is a CR2032 adequate for sensible retention time?
Arjunan M R:
Why don't build an enclosure for the battery.Which can be removed when battery is needed to be replaced.
Simon:
Well there is the matter of cost and ease of replacement. I can easily get this item: https://www.mouser.co.uk/ProductDetail/Keystone-Electronics/1061?qs=sGAEpiMZZMtT9MhkajLHrnU1d13jcSgSD%252BrGIhHEbuk%3D for a CR2032 and that is sturdy enough but they don't seem to make that style for CR2450 cells. If a CR2032 will provide enough power for the RTC then I can use one of those.
JackJones:
I've always just used CR2032.
Looking at the datasheet it says: "Timekeeping Battery Current (I2C Inactive) 3.5µA". That includes the average temperature conversion current.
You're looking at years and years of battery power, at which point you're probably pretty close to the shelf life of CR2032 anyway.
wraper:
You should be more concerned about SMD soldering failure (which I've seen a lot of times) rather about battery falling out.
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