If this is the case, use 1F and it should not stop.

Which MCU are you using? (Arduino based)?

Yes Arduino based

 

Batteries do not stop. What is the voltage at the battery terminals when your system stops working? What makes it start working again?

My guess is a software problem with your Arduino, and it re-starts after cycling the power.

Bob

 

Batteries do not stop. What is the voltage at the battery terminals when your system stops working? What makes it start working again?

My guess is a software problem with your Arduino, and it re-starts after cycling the power.

Bob

Voltage is around 3.5 which suggest its not discharged fully. It restarts when I re-connect the battery.

 

Voltage is around 3.5 which suggest its not discharged fully. It restarts when I re-connect the battery.

So when it stops the battery has mysteriously disconnected itself?

Or did you mean it restarts when you disconnect and then reconnect the battery.

Bob

 

So when it stops the battery has mysteriously disconnected itself?

Or did you mean it restarts when you disconnect and then reconnect the battery.

Bob

No I manually disconnect and re-connect the batteries.

 

Okay, so what restarted it is rebooting your Arduino, which means it had likely gone astray. Could be a programming error, could be noise, could be a voltage drop when the 180mA device kicks in.

Bob

 

If it's not already, you could try powering the Arduino from a separate supply and see if that helps.

 

I think its time you give us the circuit and exact motor specs.

By my calculations: 17A/h ÷ 64 days = 0.27A/h per day.

0.27A/h per day ÷ 24 hours = 0.011A

I hope I did not miscalculate something, but otherwise:
You are telling me that your entire Arduino plus servo motor have 11mA consumption?

 

I found this on the Arduino forum:

https://forum.arduino.cc/index.php?topic=414705.0