Can you take cordless straighteners on a plane?

Yes. Most cordless straighteners use lithium-ion batteries under 100Wh, which are permitted in carry-on luggage by most airlines. Check your specific airline's policy and always carry it in your carry-on, never checked luggage.

How long do cordless straightener batteries last overall?

Expect 2-3 years of regular use before noticing significant battery degradation. Most batteries retain 80% capacity after 300-500 charge cycles. After that, the battery holds less charge but the straightener still works when plugged in.

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