If your battery is older it may have swollen slightly, generally that's because you need to stop using that battery it's time to get another, AND the tweezers can work better if you warm the camera up, like put it near your body if your out so that there is less tug hassle. The swollenness of the batteries demonstrate that they are aged and need replacing.
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=== Update (05/12/25) ===
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The swollen batteries are a danger to health. Lithium ION batteries can explode, so try to remove and get rid of them safely.
If your battery is older it may have swollen slightly, generally that's because you need to stop using that battery it's time to get another, AND the tweezers can work better if you warm the camera up, like put it near your body if your out so that there is less tug hassle. The swollenness of the batteries demonstrate that they are aged and need replacing.