Casio DT-930M50E User Manual page 94

Using the Cradle-type Battery Charger
[Caution]
■ Ambient Temperature Ranges for the Battery Pack
· Temperature ranges for battery pack use in the Handheld Terminal,
Important!
· Use only the specified battery pack.
· Battery packs naturally discharge even when they are not loaded in the
· For best charging results, keep the Cradle-type Battery Charger,
E-64
charging, and storage are specified below. Temperatures outside these
ranges create the danger of deterioration of battery pack performance
and shortening of its service life, as well as fluid leakage and heat
generation.
Operating Temperature: –20C to 50C
Charging Temperature: 0C to 40C
Storage Temperature: –20C to 60C
remove the battery pack and then re-attach it. If this does not solve the
problem, it means that the battery pack is defective and needs to be
replaced.
Handheld Terminal. Use a battery pack as soon as possible after
charging it.
Handheld Terminal and battery pack contacts clean by periodically
wiping them off with a cotton swab or dry cloth.