[Battery Standby Time]

21 minutes ago, james.wilson said:

the capacity of the battery lowers with age and conditions etc

 

is there a recognised formula you guys use to calculate this please?

[Battery Standby Time]

13 hours ago, james.wilson said:

yes you need a bigger battery. Also A/h is based on a 24hr discharge and only while brand new you will loose 10% in the first couple of years

 

10% i cannot find anything to relate to that figure.

 

All seems a bit confusing. Looking on the net there seems to be a few different calculations.

 

What is meant by de-rating factor and aging factor? 

 

 

[Battery Standby Time]

Hi

 

How would you work out how long a battery will last?  I have a 3.2ah battery but id like to know if it will last 24 hours. 

 

http://www.actmeters.co.uk/alarm-advice/fault-finding-a-guide/

 

Using the act fault finding guide i have measured the standby current as 225 milliamps. so 3.2ah/225 = 14.22 hours. is this correct please?