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It appears that the T4 RTC draws less than 30 microamps.
On Wednesday, February 19, 2020, 8:25:02 AM EST, Jim Sheldon <w0eb@...> wrote:
Total overkill. A CR2032 or even smaller coin cell will provide keep alive voltage for the real time clock for close to a year or even more. Cell phone batteries are expensive where coin cells are usually under a dollar. I wouldn't even consider putting one of those huge cell phone batteries (compared to the size of the Teensy 4.0.)..
Jim - W0EB
------ Original Message ------
Sent: 2/18/2020 11:12:22 PM
Subject: Re: [BITX20] TSW Teensy 4.0 software with RTC coming soon #ubitx #v6
Why not using a cellphone batt with a voltage controller. They are verry slim and power enough