Sony ILCA-77M2 - Manual (Page 180)

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 (sold separately), and leave the product for 24 hours or more with the power off.
[258] How to Use Precautions/This product Precautions
Battery pack and battery charger
Charging the battery pack
The charging time differs depending on the remaining battery charge and the charging conditions.
We recommend charging the battery pack at an ambient temperature of between 10°C to 30°C (50°F
to 86°F). The battery pack may not charge efficiently outside this temperature range.
Connect the battery charger to the nearest wall outlet (wall socket).
Do not recharge a battery pack that has just been charged or is nearly fully-charged before using it.
Doing so affects the battery performance.
Do not use the battery charger (supplied) to charge other battery packs other than those in the
InfoLITHIUM "M" series. Charging other battery packs than the specified type may cause battery
leakage, excessive heat, explosion, or electric shocks and may lead to burns or injuries.
If the CHARGE lamp flashes, the battery may be malfunctioning, or a battery pack of another type
than the specified one may have been inserted. Make sure the battery pack is correct. If the battery
pack is of the specified type, remove the battery pack and insert a different battery pack, and check
whether the battery charger operates correctly. If the battery charger operates correctly, the first
battery pack may be malfunctioning.
If the battery pack is dirty, the battery pack may not charge correctly. Wipe off the dirt with a dry cloth.
Notes on using the battery pack
Use the battery pack NP-FM500H. You cannot use NP-FM55H, NP-FM50, or NP-FM30 with this
camera.
The remaining battery indicator may not provide an accurate reading depending on the battery usage
or environment.
The battery pack is not waterproof. Be careful not to get the battery pack wet.
Do not leave the battery pack in locations with high temperatures, such as in a car or under a blazing
sun.
Using the battery pack efficiently
When the ambient temperature is low, the battery performance is degraded and the operating length
of the battery decreases. In addition, the speed of continuous shooting decreases. We recommend
that you warm the battery pack, for example in your pocket, and insert it into the camera right before
you start shooting.