Smallest and lowest power RTC?
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Real Time Clock (RTC) Unit (HYM8563) | m5stack-store
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Amazon.com: DAOKI 5Pcs RTC I2C Module Arduino I2C RTC DS1307 AT24C32 Real Time Clock Module 24C32 Memory High Precision for AVR ARM PIC SMD Compatible with Arduino with 60 Pin : Electronics
SparkFun Real Time Clock Module - BOB-12708 - SparkFun Electronics
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![ChronoDot - Ultra-precise Real Time Clock [v3] : ID 255 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/255-05.jpg "ChronoDot - Ultra-precise Real Time Clock [v3] : ID 255 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits")
ChronoDot - Ultra-precise Real Time Clock [v3] : ID 255 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
DS 12C887: RTC IC Real-Time-Clock+RAM EDIP-24 at reichelt elektronik
Dallas DS12887 IC RTC Chip Real Time Clock Ram128 1pc for sale online | eBay
Real Time Clock (RTC) IC top list
