Does current flow in this battery when on standby?

[treez]

We have an emergency lighting unit, with a battery.
Obviously, most of the time, there is no emergency, and the Emergency unit is on standby.

The emergency lighting unit consists of a charger which supplies current to both the battery and the microcontroller circuit.
During standby, the microcontroller circuit draws 7mA.

So, supposing that 207mA flows out of the charger, then obviously 7mA of that goes to the microcontroller circuit, and 200mA goes into trickle charging the battery.
...but is that what actually happens.?....maybe the whole 207mA flows into the battery first and then the 7mA flows out of the battery and into the microcontroller circuit?...meaning that the battery will be slightly overheated by the higher than normal trickle charge current, which is only supposed to be 200mA.

This overheating will damage the battery as all this is happening 24/7?

 

[D.A.(Tony)Stewart]

is your supposing correct?

the 200mA only happens if the battery was discharged to a lower voltage

,unless there is damage which causes leakage and continuous self draining, it wont be 200mA

yes heat increases rate of self wearout

 

[treez]

the 200mA only happens if the battery was discharged to a lower voltage

...actually the 200mA is the constant trickle charge (C/20), and flows all the time, as is the case with nicd's.

 

[crutschow]

...............................

So, supposing that 207mA flows out of the charger, then obviously 7mA of that goes to the microcontroller circuit, and 200mA goes into trickle charging the battery.
...but is that what actually happens.?....maybe the whole 207mA flows into the battery first and then the 7mA flows out of the battery and into the microcontroller circuit?...meaning that the battery will be slightly overheated by the higher than normal trickle charge current, which is only supposed to be 200mA.

This overheating will damage the battery as all this is happening 24/7?

No. The net current into the battery is the total current minus the 7mA microprocessor current. In your "maybe" scenario the 7mA current would be simultaneously flowing into and out of the same wire to the battery, which is 0mA net current.