A practical purchasing framework for comparing USB-C chargers beyond the wattage printed on the box.
Step-by-step guide
Start with the devices
A charger should be selected for a defined device mix and destination market. List the phones, tablets and laptops to be supported, the number of ports used simultaneously and the required plug type. This guide explains specification checks and supplier questions; it does not report laboratory testing of the listed products.
Compare usable output
Ask for the supported USB Power Delivery voltage and current profiles and whether PPS is available where your devices need it. A headline wattage does not describe every port combination. Request the power-allocation table for single-port and multi-port operation. Confirm cable ratings separately: the cable supplied in the box can limit the usable charging power.
Request verifiable evidence
Obtain an identifiable model number, manufacturer details, label photographs and applicable test reports for the destination market. Check that the report refers to the exact product and relevant configuration. A logo on a listing alone is insufficient evidence. Ask about temperature protection, overcurrent protection and the supplier’s procedure for tracing production batches.
Compare the complete quotation
Use the same specification sheet for every supplier. Request unit price at your planned quantity, packaging, cable inclusion, lead time, shipping terms and warranty handling. Confirm whether branding or a packaging change affects minimum order quantity. Compare landed cost and replacement arrangements before choosing a supplier.
Approve a reference sample
Evaluate samples with your intended devices and document the accepted configuration. Before shipment, agree on checks for port identification, plug fit, packaging and measured output under an appropriate test procedure. Electrical safety testing requires suitable equipment and qualified personnel. Keep the approved sample and written acceptance criteria with the purchase record.
