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Realtime clock without battery Module

The DS3231 RTC module is a time-tracking device that gives the current time and dates. The word RTC is a is meant Real Time Clock.
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Realtime clock without battery

Introduction Realtime clock without battery:

The DS3231 RTC module is a time-tracking device that gives the current time and dates. The word RTC is a is meant Real Time Clock. The RTC module is made of the clock chip DS-3231. This module is generally used in computers, laptops, mobiles, embedded systems applications devices, etc. to provide time and date. RTC module works on the twelve-C protocol.

The module provides details such as a second, minute, hour, day of the week, day of the month, month, and years including correction for leap year. One of the more interesting things It can operate either in 12 Hours or in 24 Hour format. It can be used for projects containing data logging, clock-building, time stamping, timers, and alarms.


  1. Range of Operating Voltage :3.3V – 5V
  2. Typical voltage supply :5V
  3. Maximum voltage at SDA, SCL : VCC + 0.3V
  4. Operating temperature : -45ºC to +80ºC
  5. Real Time lock chip :DS3231 I2C
  6. EEPROM Chip :AT24C32 32K I2C EEPROM memory
  7. Configurable I2C device Address for : AT24C32 Using SMD jumpers on PCB (A0, A1, A2)I2C interface 400Khz
  8. Battery type :LIR2032 rechargeable lithium battery
Realtime clock without battery Module

Circuit Operation:

It worked should and did its function but I had one issue - when I unplug the breadboard power supplier and turn it off, it takes only a rather short while - maybe 2 days or so - to drain the battery, and then it loses its time.

I could not yet confirm if the drain also happens when the power is up, but I presume that would not be the case - I will have to buy a new battery again to test them.

realtime clock without battery circuit operation

So what could happen and did this happen to the others before? I suspect that the power of the battery goes to the circuit on the breadboard and it "tries" to power the Nano and other components. Do I need not to put in a diode or something to keep the power of the RTC module?

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How the Realtime clock without battery Work:

believe that the RTC would work just fine without the battery. Off the top of my head, I think you would need to re-enable the RTC oscillator at power on. That would be taken care of if you keep the times /dates init code in setups and simply preset arbitrary times/dates.

The battery provides a continuous power supply to the RTC chip, which keeps track of the time. RTC battery (also known as CMOS battery) is a small battery that powers the real-time clock (RTC) and CMOS memory of the computer and electronic devices.

All of the physical Time Timers require a battery to operate. For best performance, we recommend the use of high-quality batteries purchased from a reputable retailer. We do not recommend the use of rechargeable batteries as they tend to they become depleted far more quickly than traditional batteries.

Frequently Asked Questions

Can RTC work without a battery?

I believe that RTC would work just fine without the battery. Off the top of my head, I think you shall need to re-enable the RTC oscillator at powers on. That would be taken care of if you keep the time/date init code in setup and simply preset an arbitrary time/date.

What happens if the RTC battery is low?

The Real Time Clock- (RTC) battery provides power for the internal clocks/calendars and for maintaining systems configuration settings. This error could occur when a machine has been turned off for an extended period (approximately one to four months), and it is the result of a depleted RTC battery.

How do batteryless clocks work?

Mechanical clocks differ in that they do not rely upon batteries for keeping time. Rather, they take the energy stored within the wound mainspring. That is why mechanical clocks need to wound up to keep time accurately. When you wind up one of these clocks, you are winding up an internal mainspring.

Can water power a clock?

Some of the modern timepieces are called "water clocks" but work differently from the ancient ones. Their timekeeping shall be governed by a pendulum, but they use water for other purposes, such as providing the power needed to drive the clock by using a water wheel or something similar, or by having water in displays.

What are AA batteries and AAA batteries?

AA batteries are about 50 mm long and 14 mm in diameter, while AAA batteries are 45 mm long and( 10.5mm )in diameter. Likewise, there has been a similar difference in capacity. An alkaline AA battery is about 2100mAh, and an AAA battery is about half of that( 1150)mAh

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