Charge Circuit; Ringer And Handset Sp-Phone - Panasonic KX-TG5671BXS Service Manual

17.3. Charge Circuit

When the Handset is put on the cradle of the Base Unit, the power is supplied from CHARGE+ and CHARGE- terminals to
charge the battery via D353 and R366 or Q361. The voltage between CHARGE+ and CHARGE- flows R231 → Q231 → pin38
of IC201, where the charge is detected. Then IC201 calculates the battery consumption amount from the previous charge, and
it controls Q361/Q362/Q363 by pin80 of IC201 until charging is complete. When charging is complete, the control pattern is
switched to Trickle charging form from Operational charging form.

17.4. Ringer and Handset SP-Phone

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KX-TG5671BXS / KX-TGA560BXS