Sony Cyber-shot DSC-RX100 IV - Manual (Page 224)

Do not carry the product by the flash unit, or use excessive strength on it.
If water, dust or sand get into the open flash unit, it may cause a malfunction.
When pushing down the flash unit, be careful not to catch your fingers.
Notes on discarding or transferring this product to
others
When discarding or transferring this product to others, make sure to perform the following
operation to protect private information.
Perform [Setting Reset] to reset all the settings.
[253] How to Use Precautions/This product Precautions
On the internal rechargeable battery
This camera has an internal rechargeable battery for maintaining the date and time and
other settings regardless of whether the power is on or off, or whether the battery pack is
charged or discharged. This rechargeable battery is continually charged as long as you are
using the product. However, if you use the product for only short periods, it gradually
discharges. If you do not use the product at all for about 1 month(s) it becomes completely
discharged. In this case, be sure to charge this rechargeable battery before using the
product. However, even if this rechargeable battery is not charged, you can still use the
product as long as you do not record the date and time.
Charging method of the internal rechargeable battery
Insert a charged battery pack into the product, or connect the product to a wall outlet (wall
socket) using the AC Adaptor (supplied), and leave the product for 24 hours or more with the
power off.
[254] How to Use Precautions/This product Precautions
Notes on the battery pack
Charging the battery pack
Charge the battery pack (supplied) before using the product for the first time.
The charged battery pack will discharge little by little even if you do not use it. Charge the
battery pack each time before you use the product so that you do not miss any
opportunities to shoot images.