Recently the car (bought used) wont start occasionally, all dash icons light up on 2007 Volkswagen Beetle

radio panel shows SAFE or 1000. Car will start with a jump and be OK for a week or 2 then it happens again. Battery is losing juice according to the tester.
Was allegedly changed in 2011. Time for a new battery or what?
Once it's jumped, it's fine, I just have to reset the clock, but trip milage indicator goes back to zero. I've only had the car for 6 months, so I'm really hoping it's nother serious.

Asked by for the 2007 Volkswagen Beetle
Have the charging system, and battery tested. Could also need to do a parasitic draw test.
Thanks for the info.
U Bet. Happy trails