Panasonic KX-WT115 Operating Instructions Manual page 54

Important Information
Important Notice Concerning the Correct Use and Charging of Ni-MH
Batteries
Batteries, due to their construction, undergo some wear and tear. The lifetime of batteries
also depends on correct maintenance. Charging and discharging are the most important
factors. You should take notice of the following to maintain the life of the batteries as long
as possible.
Ni-MH batteries have a kind of memory, the "memory effect". If fully charged batteries are
used several times only for 15 minutes in the handset and then recharged, the capacity of
the batteries will be reduced to 15 minutes due to the memory effect. Therefore you should
discharge the batteries completely, i.e. use them in the handset until " " on the display
starts flashing. Then recharge them as described in the manual. After the memory effect
has occurred, it is possible to achieve almost complete capacity of the Ni-MH batteries by
charging and discharging several times one after another.
Ni-MH batteries can also self-discharge. This self-discharge depends on the ambient
temperature. At temperatures under 0 °C, the self-discharge will be the lowest. High
humidity and high temperatures support the self-discharge. Also long-term storage will lead
to self-discharge. Dead Ni-MH batteries should not be disposed of normally. They contain
toxic heavy metal hydride and therefore should be recycled.
CAUTION
RISK OF EXPLOSION IF BATTERIES ARE
REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING
TO THE INSTRUCTIONS.
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