# Can I use lithium coin cell battery CR2320 for discharging about 80 mA at 3 V?

I need to use a coin cell battery as a source for supplying 3.0 V at about 70-80 mA for about 2 hr per day. The coin cell battery I want to use, its spec sheet doesn't tell me much about what I want to get out of it. Here is the data sheet link: http://data.energizer.com/PDFs/cr2320.pdf. 80 mA seems a lot for me for this little coin cell batteries as they are only used for very low power electronics but I am not quite sure if it could be applicable to my case as the data sheet is not very clear to me.

• Look at the datasheet : notice that IR starts at 20 ohms and rises. At 80mA that develops 1.6V leaving 1.4V for your electronics. And it won't last 2 hours at that rate. – Brian Drummond Nov 14 '14 at 18:03

Using 6.9mA pulse test on the datasheet the graph indicates a 25-30$\Omega$ internal resistance, which would give you ~100mA short circuit current, so at 80mA you'd be down to half a volt or so.