I got this adapter after my original adapter's sheath broke away. At first, it charged my battery pretty well. But after about a month, I started getting the message that my battery wasn't charging. Since I had just bought a charger, I assumed it was the battery. I bought a new battery, but I was still getting the message that it wasn't charging. I got it checked our and it was the BRAND NEW adapter that I had gotten. It was powering my computer but not charging the battery. So this new adapter, that cost over $20, lasted a measly month. Great.