Check out this:

Voltage: 3v
Nominal Capacity: 65mAh
Nominal Discharge current: 200=B5A
Max pulse discharge current: 75mA
Charge/Discharge Cycle Lifetime:
    Depth of Discharge =3D 10%    1,000 (6.5 mAh discharge) (total capacity
6,500 mAh)
    Depth of Discharge =3D 20%     300 (13 mAh discharge) (total capacity
3,900 mAh)
Dimension: 20 x 3.2mm
Weight: 3g

This is from a Maxell ML2032 Rechargeable Coin Cell battery.

Rodolfo

-----Mensaje original-----
De: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]En nombre de
David VanHorn
Enviado el: S=E1bado, 23 de Junio de 2012 04:40 p.m.
Para: Microcontroller discussion list - Public.
Asunto: Re: [EE] Low impedance coin cells


The target would be many cycles per day, (<20) and a total lifetime of
many months.
The normal cells won't do it.


On Fri, Jun 22, 2012 at 3:04 AM, Nily <seoane_re@sinectis.com.ar> wrote:
> How many cycles will you need (<50mA for a few 10s of mS)?
>
> -----Mensaje original-----
> De: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]En nombre de
> alan.b.pearce@stfc.ac.uk
> Enviado el: Viernes, 22 de Junio de 2012 01:17 a.m.
> Para: piclist@mit.edu
> Asunto: RE: [EE] Low impedance coin cells
>
>
>> The basic problem is that the customer WANTS a coin cell, because it fit=
s
> the space
>> they have available, but I'm not aware of any coin cell that has a low
> enough
>> impedance for our moderate pulsed energy needs.
>> (<50mA for a few 10s of mS)
>
> Are you sure the 2032 cell you originally quoted won't do this? I ask
> because I got a rechargeable coin cell (pretty sure it's a 2032) to
replace
> the battery in a wind up recharge =A0LED torch, and it drives the 3 LEDs
> nicely, and I would have thought they would easily be drawing that curren=
t
> between the 3 of them (but haven't measured it)
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