Chosen Solution
For the past week or so I’ve been switching out batteries in and out of iPhone 6’s to test whether or not the phone itself is functional. But I was wondering if it was safe to label the battery with a sharpie or something to keep track of the date or times I’ve used the battery over long periods.
Yes, a sharpie is fine to write on a battery with. If you still don’t feel comfortable about it, you can always use Post-It notes.
labelling shouldnt be a problem aslong as it not punctured etc
