Sony GV-S50 - Manual (Page 15)

Using the Battery Pack Efficiently
Preparing battery packs
Prepare 2 or 3 times more battery power than you plan to use.
The published battery capacity is measured in a continuously playing VCR
at room temperature starting with a fully charged battery. Fast winding or
rewinding uses much power than normal playing. Consequently, battery
consumption becomes faster when these operations are performed
frequently.
Battery consumption is faster in a cold climate
Cold climates reduce the efficiency of a battery and cause it to run out
more quickly.
When to replace battery packs
When a battery pack is fully discharged, the POWER lamp starts blinking
slowly. During recording, “BATTERY” also starts lighting on the screen.
Replace the battery when the POWER lamp starts blinking rapidly.
Turn off the video recorder/monitor power before replacing the battery.
Especially during recording, keep the cassette inside the cassette holder
while replacing the battery. When a fresh battery is attached, recording can
be resumed smoothly without any picture distortion.
Notes on charging
Before using a battery pack, charge it fully. A newly purchased battery pack
also needs to be charged before its first use.
Recharge a battery pack only when it is fully used out
Avoid recharging only partly used battery packs. Repeated charging of
partly discharged battery packs reduces their capacity and shortens their
overall life span. The original capacity can sometimes be recovered by fully
discharging and then fully recharging the battery pack.