2 Sony NP-FV100 5 Hour Replacement Batteries For The Sony DCR-SX63 DCR-SX83 DCR-SR68 DCR-SR88 SONY HDR-CX110 HDR-CX150 HDR-CX300 HDR-CX350 HDR-CX500V HDR-CX550V HDR-CXR150 XR350V XR550V

There is really nothing bad to say about this battery. I've used it in the freezing cold winter weather and indoors too. It lasts a long time. My biggest complaint is the cost of the battery, absolutely ridiculous, but it does work well. Given the length of time required to charge this, typically overnight, it would be nice to have two of them, but then you would also need a stand alone battery charger. I'm more disappointed that Sony forces you to buy a battery charger instead of including one with the camera or with this monster battery.