Every season, buyers inherit the same shelf argument: more watts, or the right watts? The honest answer is that wattage is the third question, not the first. The first is which devices your customers actually charge; the second is which electrical profiles those devices negotiate. Only then does the headline number mean anything. This post turns that order into a working framework, using the documented ranges on this site as the example set.
Step 1: inventory the devices, not the demographics
Write down the device classes your channel serves and their charging ceilings. Current flagship phones fast-charge in the 25-45W class and taper; mid-range phones cap lower; tablets live at 30-45W; ultrabooks draw 45-65W; performance laptops start at 90W. A phone-only channel gains nothing from 100W stock except cost; a laptop-accessory channel loses credibility with 30W stock. The wattage selection guide holds the full mapping - start there and mark the tiers your shelf genuinely needs.
Step 2: read profiles, not headlines
Two chargers with the same wattage can deliver different experiences. What the device experiences is the profile set: the fixed PD steps (5V through 20V), the PPS range for phones that negotiate fine-grained voltages, and the behaviour under shared load. Samsung- and Pixel-heavy markets need PPS ranges printed on the spec; Apple-centric channels need clean fixed steps; laptop programs need the 20V step at full current. When a supplier's page cannot show you these, the comparison is already over - move to a supplier whose series tables print them, as this catalogue does for all 80 documented models.
Step 3: interrogate the split
Multi-port chargers advertise their total. Your customers experience the split: what port one still delivers when port two is busy. A "65W" dual-port unit that drops the main port to 30W under dual load will be reviewed as a 30W charger by every laptop owner who plugs in a phone beside it. Published splits - 45W + 20W is the honest pattern in the 65W series here - let you write listing copy that survives contact with reality. If a supplier will not publish splits, assume the worst split and price accordingly.
Step 4: settle plugs and markets before price
The same electrical platform ships with straight or foldable US plugs, EU, UK, KR or AU standards - but not every model offers every plug. Shortlist by market first (the travel page groups the foldable and multi-standard models), then by the certification listings your market requires, and only then compare prices inside the surviving set. Price comparisons across different plug and certification configurations are how programs end up re-quoting in week three.
Step 5: sample against the published numbers
Samples are not for looking at; they are for metering. Load each port, verify the fixed steps and the PPS window with a USB meter, run the split test with two devices, and hold full load for an hour to feel the enclosure temperature. Cycle foldable plugs and, on retractable models, the cable mechanism - the retractable series is a mechanical product as much as an electrical one. A supplier confident in its specifications will welcome the meter; the specifications on this site are published precisely so they can be checked.
The framework on one line
Devices first, profiles second, splits third, plugs and certifications fourth, price last - and samples metered against published numbers before any purchase order. Buyers who run the sequence in that order rarely meet the two classic failures of charger programs: shelves stocked with watts nobody can use, and listings that promise what the hardware never claimed.
Next reading: 65W vs 100W GaN chargers for the top-of-shelf decision, and the manufacturer vetting checklist for the supplier side of the same discipline.
Worked example: a three-tier shelf in one pass
Watch the framework operate on a typical mid-market program. The channel sells phones and tablets, some ultrabooks, no gaming laptops. Step one marks the device ceilings: phones to 45W class, tablets to 45W, ultrabooks 45-65W. Step two demands profiles: PPS windows for the Android flagship share, clean 20V steps for the ultrabooks. Step three prices the split: the volume SKU should hold 45W on the main port with a phone attached, which points at the 65W A+C pattern rather than a 45W unit whose split would strand the laptop at 20W. Step four fixes plugs - foldable US for the travel attach rate, EU for the export shelf - and checks certification listings per surviving model. Step five meters the samples. The shelf that falls out - 20W mini, 45W A+C, 65W A+C - is unglamorous and almost impossible to return, because every claim on every box was read off a published table before the order was placed.
The two failure modes this prevents
The wattage mirage. A shelf led by a 100W hero in a phone channel: the hero sells once, reviews note it charges no faster than the 30W beside it, and the tier's credibility - and margin - drains into discounting. The split surprise. A dual-port bestseller whose main port collapses under dual load: reviews discover it in a weekend, and the listing's total-wattage headline becomes the evidence against it. Both failures are information failures, not product failures; both are prevented at the desk, in steps two and three, for free.
A closing checklist
- Device ceilings written down, per channel
- Fixed steps and PPS ranges confirmed from published tables
- Splits quoted in the listing draft, not just totals
- Plug matrix settled per destination market
- Certification listings matched model by model
- Sample metering plan agreed before the PO
Run it in order. The framework's whole argument is that order is the discipline.
One last distinction: choosing for a fleet
Corporate buyers run the same framework with one substitution: the “channel” is a device fleet list from IT, and the return risk is a helpdesk ticket instead of a marketplace review. Fleet logic favours fewer, higher tiers - one 65W standard issue beats four assorted models - and it prices the split as an employee-experience feature: a charger that keeps the laptop ahead while the phone charges is a charger nobody complains about in the ticket queue. The evidence standard does not change; if anything it hardens, because a fleet order multiplies any specification error by the headcount.
One sentence to carry out of this post: a charger program is a set of published promises - profiles, splits, plugs, listings - and choosing well means reading every promise before you pay for any of them.
The maintenance mindset
Choosing well is not a one-time event. Device fleets turn over, protocols creep upward, and the shelf that was correctly specified two seasons ago drifts as phones raise their ceilings and laptops standardise on new port counts. Build a light annual ritual around the framework: re-inventory the device classes your channel actually sold chargers for, re-read the published profiles of your current SKUs against them, and re-check which tiers earned their shelf space in sell-through rather than in hope. The catalogue side of that ritual is deliberately easy here - profiles, splits and listings live in public tables that can be re-read in an afternoon. A program maintained this way ages gracefully; a program chosen once and forgotten ages into the two failure modes and stays there until someone runs the framework again.