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Provider: Pro-Logic Technologies, Kangari Building, Nairobi
The charging circuit encompasses all the components on the motherboard that manage the safe and efficient flow of power from a charger into the battery. This includes the charging IC, PMIC, USB power delivery controller, filter capacitors and inductors, and the protection circuits that prevent overcharging, over-voltage, and over-current conditions. When any part of this circuit fails, the phone may not charge at all, charge to a limited percentage, charge only from specific chargers, or — in dangerous cases — charge without regulation.
Symptoms of Charging Circuit Failure
- No charging response from any cable or charger, with the port confirmed clean and working
- Phone charges only on slow 5W charge despite fast charging support
- Charging stops at a fixed percentage (e.g., always stops at 80% or 50%)
- Battery drains faster than it charges even on the original charger
- Phone gets excessively hot near the charging port area while charging
- Charging works intermittently with no cable or port issues found
Estimated Charging Circuit Repair Costs in Nairobi (2024–2025)
| Repair Scope | Labour (KES) | Parts (KES) | Total Estimate (KES) |
|---|---|---|---|
| Single passive component (capacitor/inductor) | 2,000 – 4,000 | 200 – 800 | 2,200 – 4,800 |
| Charging IC replacement | 3,500 – 7,000 | 1,500 – 5,000 | 5,000 – 12,000 |
| USB PD controller chip replacement | 4,000 – 8,000 | 2,000 – 6,000 | 6,000 – 14,000 |
| PMIC-level charging section repair | 5,000 – 12,000 | 3,000 – 10,000 | 8,000 – 22,000 |
| Full charging circuit fault diagnosis only | 1,000 – 2,000 | — | 1,000 – 2,000 |
Safety First
Charging circuit faults that allow unregulated voltage to reach the battery are potentially dangerous. If the battery is swelling or the phone generates unusual heat while charging, discontinue use immediately and bring the device in for diagnosis before any further charging is attempted.
Pro-Logic Technologies at Kangari Building, Nairobi uses voltage and current testing equipment to pinpoint charging circuit faults to the specific component level.
