User Guide for the Kyocera KX440 PTT phone 3
Avoid exposing the battery to extreme temperatures, direct sunlight, or
high humidity.
Never dispose of any battery in or near a fire. It could explode.
Common causes of battery drain
Playing games.
Using the Web.
Keeping backlight on.
Making and receiving Push to Talk (PTT) calls.
Using the speakerphone.
Operating in analog ( ) mode. Your phone switches between modes to
find the best signal. To set your phone to operate in a single mode, select
Menu Settings Network Digital or Analog.
Operating in digital mode when far away from a base station or cell site.
Using data cables or accessories, such as the Hands-free headset.
Operating when no service is available, or service is available intermittently.
High earpiece and ringer volume settings.
Repeating sound, vibration, or lighted alerts.