I gave this product to my wife as a gift. She uses the mirror every day... and charges it no more than once every two months... so the battery lasts a very long time!

Since there are two of us using the mirror, plus my husband with the contact lenses, we have to recharge once a month. We have been using this mirror for 4 or 5 years, if that is any help.

I can also confirm this

For me, the situation is exactly identical to Arcuo's