Difference between the 2016 and 2032 button batteries?

Thickness (3.2 mm versus 1.6 mm) and energy capacity (225 milliampere hour versus 90 milliampere hour).

Data Sheet:

So, the 2032 hold their charge longer, right?

Sheet:

On the shelf, maybe, maybe not. With a given current drain rate, yes. For instance if their load drains 10 micro amperes, the 2032 will last about 2 and a half years, while the 2016 will last about a year.

The thickness; 3.2mm VS 1.6mm.

Sheet:

Not necessarily. Dependent on thermal history. Hallmark once used to make greeting cards that played music when opened; used a dinky ASIC, a piezoelectric sounder, and a lithium battery. Most of them arrived at stores DOA because Hallmark, in their stupidity treated these greeting cards exactly like all other greeting cards: they went into hot warehouses for later distribution.

They have different energy capacities, just like the difference between AA, AAA, C and D cells (which are all 1.5V nominal). The CR2032 will be able to deliver a given amount of power for a longer period of time than the CR2032.

It's like the petrol tank in a car. The engine will use the same amount of petrol (power into a load) regardless of the size of the tank, but a bigger tank (greater energy capacity) will get you further than a smaller tank.

Dave.

Robert Baer wrote in news: snipped-for-privacy@corp.supernews.com:

actually,lithium cells have a long shelf life,and a wide temp range.

The type number of lithium coin cells indicates their size The first 2 digits are diameter in mm, the second 2 the thickness in units of

They probably used a super-cheap alkaline battery (I'd guess maybe 1 cent each) rather than spend an order of magnitude more for a Li cell. Best regards, Spehro Pefhany

P/N mAh Diam Weight H (mm) (g) (mm)

--- --- ------ ---- --- cr2016 90 20 1.9 1.6 cr2032 225 20 3.3 3.2

(* jcl *)

Wal*Mart still sells these today; you can get perhaps a dozen different melodies depending on the card you choose. (I don't think they're Hallmark brand, though.)

Perhaps; the shape and size was "suggestive"...

If they have been sold for a goodly number of monthe, then the maker and/or the disty most likely learned the "Hallmark lesson" and treat them like batteries and not cards.

Robert Baer wrote in news: snipped-for-privacy@corp.supernews.com:

a LED flasher I've gotten in an OTC supplement used the CR2032,3 of them in parallel.

My PC uses a CR2032 for it's CMOS battery.

Cards of 5 for a buck are at some of the 'dollar stores' at local flea markets. 25 for $5 and I haven't found a dud yet. I bought these at "The Markets Of Marion" last year, and I see the vendor with them every few months, when I go back.

Only relatively.

You can get 'em from Digikey for about that price, although FedEx won't ship them. Makes me wince to think of the prices I paid at Target or (worse) RadioShack.

I never use Fedex.

Fedex ground should handle them-- it's a prohibition on shipping in aircraft-- maybe only passenger aircraft.

Best regards, Spehro Pefhany