Choose a shared charger by the power available with all your intended ports occupied. On the Anker Prime A2688, the two USB-C ports provide up to 65W and 35W together. A laptop needing the full 100W allocation cannot keep it while this charger also powers a phone.
Match the model before using the map
This example is the Anker Prime A2688, 100W, three ports, Phantom Gray, US folding two-flat-prong plug. The selected Amazon US listing is B0CZ6LXL8R. Other chargers with “Prime” or “100W” in their names can divide power differently.
Facing this model's ports with the laptop symbol upright, C1 is the upper USB-C port, C2 the middle USB-C port, and USB-A the lower rectangular port.
The complete occupied-port table
These are published maximum output allocations, not the power a device will necessarily draw. Only the listed ports are in use.
| Ports used | Maximum allocation |
|---|---|
| C1 only | C1: 100W |
| C2 only | C2: 100W |
| USB-A only | USB-A: 22.5W |
| C1 + C2 | 65W + 35W; 100W total |
| C1 + USB-A | 65W + 22.5W; 87.5W total |
| C2 + USB-A | 12W + 12W; 24W total |
| All three | C1: 65W; C2 and USB-A share 24W; 89W total |
The three-port diagram does not specify a fixed individual split of that shared 24W. Do not assume each lower port receives 12W in this configuration. The detailed three-port rating is 89W despite broader “100W” multi-device marketing wording.
Turn the numbers into a decision
- 65W for a laptop plus up to 30W for a phone: the C1 + C2 allocation covers that example budget. Put the laptop on C1, then check both devices' required charging modes and cables.
- 100W for a laptop plus another device: this model's published combinations do not provide that. Keep separate chargers or select a model that explicitly supports the simultaneous allocation you need.
- Already own the A2688? If the laptop is on C2 while USB-A is occupied, try the intended laptop connection at C1 before replacing the charger. The C2 + USB-A combination is limited to 12W each.
- A third device as well: C2 and USB-A now share 24W. That does not cover the example 30W phone budget alongside a USB-A accessory.
Check the device and cable, not just the wattage
USB Power Delivery lets devices negotiate power. A 35W port allocation does not promise 35W charging for every phone. Match the device maker's supported charging mode and voltage/current requirements; this guide does not verify every phone's fastest mode or the charger's full PPS range.
Use your exact laptop's charging guidance. Its original adapter's rating describes that adapter's capability, not the laptop's constant consumption. A demanding workload and charging a nearly full battery are not the same task.
A 60W-rated cable cannot preserve a 65W or 100W budget. For this charger's 100W mode, Anker specifies an E-marker cable, and its USB-C specification reaches 20V at 5A. Use a suitably rated 5A USB-C cable. A 240W-capable cable does not turn this into a 240W charger.
These ratings also do not establish sustained output under every load or temperature. We have not tested long-load performance. If your present chargers already meet the simultaneous task, you do not need a new shared charger.
Check the exact option
Match A2688, Phantom Gray and the US plug before ordering. Current Amazon price, seller, stock and delivery are not claimed here. Consider it only if its occupied-port allocations and your devices' requirements match.
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View the Anker Prime A2688 US charger on Amazon
Sources checked October 15, 2026: Anker A2688 specifications and US product page; exact Amazon US listing and port diagrams; USB-IF power-delivery and cable guidance; Apple's model-specific power-adapter guidance. Research-based, not hands-on tested. The full source details support this article's limits rather than a universal compatibility or charging-speed claim.