LG -P970 Service Manual page 61

3.10.3 Charging control
P970 uses individual Charger IC which is RT9524.
Features
28V Maximum Rating for DC Adapter
Internal Integrated Power MOSFETs
Support 4.2V/2.3A Factory Mode
50mA Low Dropout Voltage Regulator
Status Pin Indicator
Programmed Charging Current
Under Voltage Lockout
Over Voltage Protection
Thermal Feedback Optimized Charge Rate
RoHS Compliant and Halogen Free
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3. TECHNICAL BRIEF
Only for training and service purposes