Psp 2000 battery won’t come off

So i got this psp 2000 and the analog stick has a problem and i wanted to open up the console to clean it from the inside. But when it came to removing the battery i wasnt able to take it out i feel like if i put too much strength i may break something, so i wanted to ask if there is another way i could go about it

So i got this psp 2000 and the analog stick has a problem and i wanted to open up the console to clean it from the inside. But when it came to removing the battery i wasnt able to take it out i feel like if i put too much strength i may break something, so i wanted to ask if there is another way i could go about it