Worst they can do is leak caustic goo, which will mess up the battery compartment of your electronics. However, I gave up using alkalines completely about 15 years ago, when Eneloop rechargeables were invented.
Worst they can do is leak caustic goo, which will mess up the battery compartment of your electronics. That dent doesn't look piercing - it'll be fine. Don't do it. Our exactly identical battery must have had a dent in it new out of the package. Immediately affected the light we put it in.
Does a dent in a battery look piercing?
That dent doesn't look piercing - it'll be fine. Don't do it. Our exactly identical battery must have had a dent in it new out of the package. Immediately affected the light we put it in. I looked and 4 days later corrosion and nasty.
Can dendrites cause a battery to fail?
Researchers have studied the formation of lithium dendrites that typically form in batteries like this and can cause them to fail. The work by researchers at Okayama University aims to create safer devices in the future. Analyzing the battery problem from inside electrodes provides new insight for future designs.