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Title: Stick with disposables for now...
Review: I wish I had thought to purchase these things later than I did. Then I would have seen the reviews warning me to stay away. I replaced the cheapo freebie batteries that can with the hand warmers and left them on for 15 minutes and they were warm to the touch but nowhere near when I expected or wanted. I wanted to avoid disposables because it seems wasteful. There used to be a heat pad you could boil to reset anfter each use and it lasted for 1-2 hours. Guess I'll start looking for it instead.
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