Sony Cyber-shot DSC-RX100 IV - Manual (Page 225)

You can charge the battery pack even if it is not completely discharged. You can use a
partially charged battery pack.
If the charge lamp flashes when the battery pack is not fully charged, remove the battery
pack or disconnect the USB cable from the camera and then reinsert it to recharge.
We recommend charging the battery pack in an ambient temperature of between 10 °C
and 30 °C (50 °F and 86 °F). The battery pack may not be effectively charged in
temperatures outside this range.
When you connect this product and a laptop computer that is not connected to a power
source, the laptop’s battery charge may decrease. Do not charge this product using the
laptop computer for too long.
Do not turn on/restart a computer, wake a computer from sleep mode, or turn off a
computer while this product is connected to the computer via USB cable. Doing so may
cause a malfunction of this product. Disconnect the product and the computer before
performing the above operations.
We do not guarantee charging if you are using a self-built or modified computer.
Charging time (Full charge)
The charging time is approximately 230 minutes using the AC adaptor (supplied). The above
charging time applies when charging a fully depleted battery pack at a temperature of 25°C
(77°F). Charging may take longer depending on conditions of use and circumstances.
Effective use of the battery pack
Battery performance decreases in low temperature environments. So in cold places, the
operational time of the battery pack is shorter. To ensure longer battery pack use, we
recommend putting the battery pack in your pocket close to your body to warm it up, and
insert it in the product immediately before you start shooting. If there are any metal
objects such as keys in your pocket, be careful of causing a short-circuit.
The battery pack will run down quickly if you use the flash or continuous shooting function
frequently, turn the power on/off frequently, or set the monitor very bright.
We recommend preparing spare battery packs and taking trial shots before taking the
actual shots.
Do not expose the battery pack to water. The battery pack is not water-resistant.
Do not leave the battery pack in extremely hot places, such as in a car or under direct
sunlight.
If the battery terminal is dirty, you may not be able to turn on the product or the battery
pack may not be properly charged. In that case, clean the battery by lightly wiping off any
dust using a soft cloth or a cotton swab.
Remaining battery indicator
The remaining battery indicator appears on the screen.