KX-TG7227UAJ, KX-TG7227UAM, KX-TG7227UAS, KX-TG7227UAT, KX-TG7228UAS, KX-TG7228UAT, KX-TGA721RUM, KX-TGA721RUS, KX-TGA721RUT, KX-TGA721UAJ, KX-TGA721UAM, KX-TGA721UAS, KX-TGA721UAT - Panasonic Telephone Service Manual (repair manual). Page 17

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17
KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
6.2.
Battery
6.2.1.
Battery Installation and 
Replacement
See For Service Hint (P.24)
6.2.2.
Battery Charge
Note:
• It is normal for the handset to feel warm during charging.
• If you want to use the unit immediately, charge the batteries
for at least 15 minutes.
• Clean the charge contacts of the handset, base unit, and
charger with a soft, dry cloth. Clean if the unit is subject to
the exposure of grease, dust or high humidity.
6.2.3.
Battery Level
6.2.4.
Panasonic Ni-MH Battery 
Performance (supplied batteries)
Note: 
• It is normal for batteries not to reach full capacity at the initial
charge. Maximum battery performance is reached after a
few complete cycles of charge/discharge (use).
• Actual battery performance depends on a combination of
how often the handset is in use and how often it is not in use
(standby).
• Even after the handset is fully charged, the handset can be
left on the base unit or charger without any ill effect on the
batteries.
• The battery strength may not be displayed correctly after you
replace the batteries. In this case, place the handset on the
base unit or charger and let it charge for at least 7 hours.
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