Works as it should. I mean come on, it's a battery. The point is, I've had my Panasonic phone (kx-tg2570s, awesome phone) for around 4 years and have recharged this battery hundreds of times and only now am I needing to replace it. It still holds a charge but now only for 2-3 days whereas it held for 5-6 days new. Talk about getting your money's worth. I will not nuy a knockoff either, only the Panasonic. If it aint broke, don't fix it, right?