common assault - section 39

[Neenee]

my parnter has been charged with common assault or as his documents have now stated he has been charged with BATTERY. what does this mean?

i am very confused and worried about this which is going to court in a few weeks at magistrates.

he is pleading not guilty, only evidence are a few abusive texts which were on a phone that the police have printed off the person in queston mobile.

there is no photograhic evidence or third party witness statements apart from the police officers who attended the interview...and to visit the prosecuting person three hours after alleged assault. the police officer in question states in their statement that there were no visible injuries to the aggrieved person at the time

i see this as it is the so called injured party and defendants words against each other. i add that it is a domestic distpute

any answers of help will be greatly appreciated.