The Panasonic DMW-BCM13E and DMW-BCM13P are essentially the same battery. The "E" in DMW-BCM13E simply denotes the European market model, while "P" might refer to a different region or packaging, but both are fully compatible with the same Panasonic cameras and share the same specifications. They are both lithium-ion batteries with a voltage of 3.7V and a capacity of 950mAh.