Will a 65W or 100W GaN charger charge my laptop?
A USB Power Delivery wattage table for MacBook, Dell XPS, Lenovo ThinkPad and IdeaPad, and HP OmniBook models, from each maker's own documents.
Short answer
Usually, yes, as long as the charger and the laptop both use USB Power Delivery over USB-C. Apple says a USB-C Mac laptop can charge from any USB Power Delivery adapter, higher or lower in wattage than the one it came with, and Dell lists a minimum of 27 watts for the XPS 13 (DX13260) and 45 watts for the XPS 14 and XPS 16 (DA14260, DA16260). Above those minimums, a smaller charger changes the speed, not whether it works. “GaN” describes the parts inside a charger, not a separate standard: Lenovo lists GaN and standard 65W adapters for the same ThinkPads, all supporting USB PD 3.0.
Laptop by laptop
The table sets each laptop maker's own figure against two common charger sizes. Apple publishes the adapter in the box and the wattage needed for fast charging; Dell publishes optimal and minimum wattages; Lenovo publishes the range its USB-C ports accept; HP publishes the adapter it supplies.
| Laptop | Adapter from the maker | Maker's power figure | With a 65W charger | With a 100W charger |
|---|---|---|---|---|
| Apple MacBook Air 13" and 15" (M5) | 40W Dynamic Power Adapter with 60W Max; 35W Dual or 70W optional | Fast-charge capable with 70W or higher | Charges; not enough for fast charging | Fast-charge capable |
| Apple MacBook Pro 14" (M5) | 70W | Fast-charge capable with 96W or higher | Charges, below the 70W supplied | Fast-charge capable |
| Apple MacBook Pro 14" (M5 Pro, M5 Max) | 70W or 96W, by chip | Fast-charge capable with 96W or higher | Charges, below the adapter supplied | Fast-charge capable |
| Apple MacBook Pro 16" (M5 Pro, M5 Max) | 140W | Fast-charge capable with 140W or higher | Charges, well below the 140W supplied | Charges, below the 140W supplied |
| Dell XPS 13 (DX13260) | – | Optimal 65W; slower below 55W; minimum 27W | Optimal | Optimal |
| Dell XPS 14 (DA14260) | 100W | Optimal 100W; slower below 75W; minimum 45W | Charges more slowly; a warning may appear | Optimal |
| Dell XPS 16 (DA16260) | – | Optimal 100W; slower below 75W; minimum 45W | Charges more slowly; a warning may appear | Optimal |
| Lenovo ThinkPad X1 Carbon Gen 13 Aura Edition | 65W (standard or GaN) | USB-C ports: USB PD 15–65W | Top of the port rating | Above the port rating of 65W |
| Lenovo ThinkPad T14 Gen 6 (Intel) | 65W (standard or GaN) | USB-C ports: USB PD 15–65W | Top of the port rating | Above the port rating of 65W |
| Lenovo ThinkPad E14 Gen 7 (Intel) | 65W | USB-C ports: USB PD 15–65W | Top of the port rating | Above the port rating of 65W |
| Lenovo IdeaPad Slim 5 14IRH10 | 65W | USB-C ports: USB PD 65–100W | Bottom of the port range | Top of the port range |
| Lenovo ThinkPad P16s Gen 4 (Intel) | 100W | USB PD 3.0; no input range given | Not stated by Lenovo | Matches the adapter supplied |
| Lenovo ThinkPad P1 Gen 8 | 140W GaN, PD 3.1 | USB-C ports: 140W input | Not stated by Lenovo | Not stated by Lenovo |
| HP OmniBook 5 Flip 14-fp0013dx | 45W | USB-C ports: USB Power Delivery 3.1 | More than the 45W supplied | More than the 45W supplied |
What the makers say about smaller chargers
Apple's support pages are the most direct. If your Mac charges over USB-C, “you can charge your Mac with any USB-C power adapter or display, even if it provides higher or lower wattage than the adapter recommended for your Mac.” When the wattage is too low for the model, Apple says “Slow Charger” appears in the battery menu, starting with macOS Tahoe 26.4. Apple's tech specs list the threshold for fast charging: 70 watts or more for the M5 MacBook Air, 96 for the 14-inch MacBook Pro, 140 for the 16-inch.
Dell's setup and specifications pages give three numbers. For the XPS 14 (DA14260) and XPS 16 (DA16260), optimal performance needs 100 watts, below 75 watts the laptop charges more slowly and a warning may appear, and 45 watts is the minimum to run the computer and charge the battery. For the XPS 13 (DX13260), the figures are 65, 55 and 27 watts.
Lenovo's product specifications reference, PSREF, gives the power each USB-C port accepts. The ThinkPad X1 Carbon Gen 13 Aura Edition, T14 Gen 6 and E14 Gen 7 list “USB PD 15-65W”; the IdeaPad Slim 5 14IRH10 lists “USB PD 65-100W”. The ThinkPad P1 Gen 8 lists 140W input and ships with a 140W GaN adapter supporting PD 3.1. For the ThinkPad P16s Gen 4, the page names the 100W adapter but no input range, so the table leaves that one open.
GaN is not a charging standard
GaN stands for gallium nitride, a material used in some chargers' electronics. It isn't part of the USB Power Delivery rating, and none of the four makers' pages we read asks for it. Lenovo's own adapter list makes the point: for the X1 Carbon Gen 13 it offers a 65W USB-C adapter, a 65W slim adapter and 65W nano GaN and slim GaN adapters, each described as supporting PD 3.0. When you compare chargers, compare the USB-C output in watts and the USB PD support printed on the label, whatever the material inside.
Above 60 watts, check the cable too
The charger and the laptop aren't the only parts. A standard USB-C cable is rated for 3 amps, which at 20 volts is 60 watts. To pass 100 watts, the cable has to be a 5-amp cable with an electronic marker chip; our guide to USB-C cables for 100W charging explains how to tell. For 140 watts, as with the 16-inch MacBook Pro or the ThinkPad P1 Gen 8, the USB Implementers Forum says the power comes from the higher voltages added in USB Power Delivery Revision 3.1, with cables that meet the 240W requirements.
How to check your own laptop
- Mac: Apple's support article says to hold the Option key, choose Apple menu, then System Information, and select Power. The wattage of the connected adapter is listed under AC Charger Information.
- Dell: open your model's Setup and Specifications and find “Power adapter requirements”.
- Lenovo: look up your model on psref.lenovo.com; the Ports row gives the USB PD range and the Power Adapter row lists the supplied adapters.
- HP: the product sheet's “Power Supply Type” line names the adapter.
- Charger: read the USB-C output on its label. A charger with more than one port may list a separate figure for each.
Sources
- Apple, Use a power adapter with your Mac: any USB PD adapter or display; higher or lower wattage; checking wattage in System Information. Read October 1, 2026.
- Apple, Charge your Mac laptop computer: “Slow Charger” message, macOS Tahoe 26.4 or later. Read October 1, 2026.
- Apple, MacBook Air Tech Specs (M5): adapter in the box, fast-charge threshold. Read October 1, 2026.
- Apple, MacBook Pro Tech Specs (M5, M5 Pro, M5 Max): adapters and fast-charge thresholds. Read October 1, 2026.
- Dell, XPS 13 DX13260 Setup and Specifications: Power adapter requirements. Read October 1, 2026.
- Dell, XPS 14 DA14260 Setup and Specifications: Power adapter requirements, and the Power adapter page (100 W type). Read October 1, 2026.
- Dell, XPS 16 DA16260 Setup and Specifications: Power adapter requirements. Read October 1, 2026.
- Lenovo PSREF, ThinkPad X1 Carbon Gen 13 Aura Edition specifications (August 28, 2026). Read October 1, 2026.
- Lenovo PSREF, ThinkPad T14 Gen 6 (Intel) specifications (August 28, 2026). Read October 1, 2026.
- Lenovo PSREF, ThinkPad E14 Gen 7 (Intel) specifications (July 27, 2026). Read October 1, 2026.
- Lenovo PSREF, IdeaPad Slim 5 14IRH10 specifications (August 28, 2026). Read October 1, 2026.
- Lenovo PSREF, ThinkPad P16s Gen 4 (Intel) specifications (August 27, 2026). Read October 1, 2026.
- Lenovo PSREF, ThinkPad P1 Gen 8 specifications (August 27, 2026). Read October 1, 2026.
- HP, Product sheet: HP OmniBook 5 Flip 2-in-1 Laptop 14-fp0013dx (B5UJ3UA): power supply type, USB Type-C ports. Read October 1, 2026.
- USB Implementers Forum, USB Charger (USB Power Delivery): 100W at 20V with 5A cables; PD 3.1 voltages for 140W to 240W. Read October 1, 2026.
Changes: first published October 1, 2026.