woodspick.A higher wattage gives a charger more available power. It does not mean every device will charge faster. Your laptop or phone must support the charger's charging standard, and it decides how much power to request.
For one compatible laptop that calls for 65W or less, a good 65W charger may be all you need. A 100W model becomes more useful when your laptop requires more power or you want to charge several devices together.
Start with your laptop
Check the laptop manufacturer's recommended adapter wattage and whether the laptop accepts charging through USB-C. A USB-C connector alone does not establish that it supports charging.
Use the original adapter and the manufacturer's support page as starting points. A laptop supplied with a high-wattage proprietary adapter may accept less power over USB-C, or may not charge through USB-C at all. Neither a 65W nor a 100W USB-C charger automatically replaces it.
If the manufacturer recommends more power than the charger can provide, charging may be slower. Under a demanding workload, the battery may even lose charge while plugged in. Check the manufacturer's guidance before choosing a smaller adapter.
Read the multiport output table
“100W” often describes a charger's maximum combined output, not the power available from every port simultaneously. Connecting a phone can reduce the power allocated to a laptop.
Look for the exact port combination you will use. As an illustrative example, a charger might supply 100W from one port when used alone but divide its output into 65W and 30W when two devices are connected. The product's own output table is what matters; other models allocate power differently.
Check the whole connection
The charger, cable and device need compatible charging capabilities. Match USB Power Delivery support and any additional requirements your device specifies. Some phones need PPS or a proprietary charging system to reach their advertised fastest charging speed.
A 60W-rated cable can limit a 65W or 100W setup. Use a USB-C cable explicitly rated for the charging power your device requires, and check whether it is included.
Choose for your actual bag
A 65W option may cost less and take up less space, although size varies by model. Paying more for 100W makes sense when you can use that capacity—not simply because the number is bigger.
Choose 65W for a compatible laptop within its output limits, especially when charging it alone. Consider 100W for a laptop with a higher requirement or a multi-device setup whose documented power split fits your needs.
This is a research-based buying guide, not a hands-on product test. Check your device's requirements and the exact charger's specifications before buying.
If you have confirmed that one compatible device needs no more than 65W, our Anker 715 vs. UGREEN Nexode Air comparison explains two single-port options and the difference in their included cables. If your setup needs 100W, neither of those models meets that requirement.
For a higher-output multi-device candidate, the Anker Prime 100W A2688 review explains its 100W two-port ceiling, 89W three-port ceiling and the cable requirements to check before buying.
Sources & scope
This is an information-based buying guide. Product-specific requirements should be confirmed in the exact manufacturer documentation.