Brownout Circuit to Cutoff Power?

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#1
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Hey, I hope I can once again save time by asking a question which has probably been answered a million times before (I can't find info when I search what I think are key terms).

Here's the problem. I have a circuit powered off of one battery (3.6V lithium coin cell). How do I disconnect my circuit from the power when my coin cell battery goes below 2V so that a user doesn't leave a device turned on for too long in between recharges?

Currently if you leave this device on for a long time, it will draw most of the charge out of the battery leaving it at 1V or less which is very bad for lithium batteries.

Any easy fixes? Terms I should search for?

Thanks

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Measure the supply voltage and let the mcu go to sleep?

Jim

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

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LTC4071 has a low battery disconnect feature.
BQ25504 likewise plus maximum power point control for energy harvesting recharge.

"Dare to be naïve." - Buckminster Fuller

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Thank you both of you for your fast and informative responses, I learned something today =) and I don't have to figure it out the hard way now so I appreciate it!