So far so good. I charged these both up, and have been using them for the last 5 hours, and they have lost very little power reserves. Hopefully these will last.. the so seem well made.

I love this product, and I have used it before. It is quite expensive for an essential oil, but I wanted this particular one, so $12.99 was worth it to me. I was upset by the outrageous $6.99 for shipping it in a tiny padded envelope though. I know for a fact that cost a whole lot less than that for packaging and postage, so for a tiny bottle (5ml equals ONE teaspoon!) they are actually charging $20.

This bok was needed to help me do the things that I want to do with Excell, and it does the jopb that I purchased it for. The instructions are clear and easy to understand. I am happy with this book.