For a very reasonable price, the RX100 fills the gap which by default requires charging the battery inside the device. Very convenient when, as I suggest, we have a spare battery. Supplied with 4 adapters: France normal outlet, cigarette lighter plug socket UK and US (walking probably in other countries). For the NP-BX1 battery takes about 2 hours to charge. I have removed one star because of one important detail: there is no "keyed" to the insertion direction, there is no reason to put the battery in reverse. In this case, when the charger is plugged into the outlet, a green LED lights ... reassuring. Error when you come back 2 hours later, the battery will not be charged. Only if the light turns red to insertion into the socket when the battery is mounted in the right direction. End of charging, the LED turns green (as in a poorly-mounted battery or no battery at all!). Forewarned is 2, you will find the right direction itself in less than a minute by trial and error.
