Panasonic KX-TGP700 Operating Instructions Manual page 20

1.9 Battery Information (KX-TPA70/KX-TPA73)
Before replacing the batteries, make sure the low battery warning is displayed, then turn
off the power to prevent memory loss. Replace the batteries and charge the new
batteries for about 6 hours (KX-TPA70)/3 hours (KX-TPA73).
If you replace the batteries before the low battery warning appears, the battery strength
icon may display an incorrect reading. In this case, use the handset as normal with the
new batteries installed.
When the low battery warning is displayed, charge the batteries for about 6 hours
(KX-TPA70)/3 hours (KX-TPA73). The battery strength icon will then display the correct
reading. To install the batteries, see 9.2.1 Battery Installation, page 113.
Note
• When replacing the batteries with fully charged batteries, turn on the handset once
with the power key (
charging, the battery indicator will not display correctly.
• There is a danger of explosion if the batteries are incorrectly replaced.
Important Notice Concerning the Correct Use and Charging of Ni-MH Batteries
(KX-TPA70 only)
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 the battery level indicator displays as empty ("
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 ℃ (32 ℉), 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.
20
) before charging. If you don't turn on the power once before
(For the United States and Canada only)
Nickel metal hydride batteries that are recyclable power the
product you have purchased. Please call 1-800-8-BATTERY for
information on how to recycle these batteries.
"). Then recharge them as