Convert milliamp‑hours to watt‑hours by multiplying capacity by 3.7 and dividing by 1000, then account for conversion losses. Match laptop peak wattage, confirm PD profiles, and test from empty to full once at home, avoiding surprises where outlets are scarce and patience thinner.
Top up during transit rather than arriving empty. Prefer partial charges to reduce heat, and keep batteries between twenty and eighty percent when possible. Use short, quality cables, avoid cheap adapters, and monitor charging speeds so you learn your pair’s normal and spot issues instantly.
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