My D3300 wont autofocus and dies very fast

i have been using this camera for around 4 years and recently it just stopped focusing, watched/read some tutorials fixes but they havent worked.

it only takes photos if i use the AE-L/AF-L button, dosent focus in viewfinder nor live.
The battery icon also goes from 3 bars to 1 bar when i hold the shutter button and it dies pretty fast if kept on, but that might just be the battery dying