[i-on compact - low battery]

Hi,

I have an Eaton I-On compact alarm. 
I’ve had internal beeping from the unit telling me the ‘RSN01 Low Battery (Radio SRN 01).

 

a few questions here 

a) what does this mean (aside from a low battery somewhere!) 

b) how on earth do I get the internal sounder to not beep when something like this happens? Having the unit beep every second at 3am isn’t ideal…. 
 

thx