Anker 733: Wall Mode vs Battery Mode — Detailed Power Comparison
The Anker 733 operates in two distinct modes with meaningfully different power outputs. Understanding the difference helps you use it most effectively.
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Wall Mode (Plugged Into Outlet)
When the built-in prongs are plugged into a wall outlet, the Anker 733 functions as a direct AC-to-DC converter — the most efficient power delivery possible:
| Port | Max Output (Wall Mode) | Primary Protocol |
|---|---|---|
| USB-C 1 | 65W | USB-PD 3.1, PPS |
| USB-C 2 | 18W | USB-PD 2.0 |
| USB-A | 22.5W | QC 3.0, AFC, FCP |
| Total | 65W (shared) |
In wall mode, the 65W comes directly from the AC power grid — no battery drain occurs on connected devices, and the internal battery also charges simultaneously.
Battery Mode (Unplugged)
When unplugged, the Anker 733 draws from its 10,000mAh internal battery, converting stored DC power for device output:
| Port | Max Output (Battery Mode) | Notes |
|---|---|---|
| USB-C 1 | 45W | Reduced from 65W wall max |
| USB-C 2 | 18W | Same as wall mode |
| USB-A | 22.5W | Same as wall mode |
| Total | 65W shared | Dynamic distribution |
The USB-C 1 reduction from 65W → 45W in battery mode is the primary practical difference. For most devices (phones, tablets, small laptops), 45W is still excellent. MacBook Pro users needing 70W+ will notice the difference.
Why Does USB-C 1 Lose 20W in Battery Mode?
The 20W reduction comes from DC-to-DC conversion efficiency. When converting from the battery’s 3.7V output to the 20V needed for 65W USB-PD delivery, the conversion circuit has inherent losses. Running at 45W output keeps those losses manageable; pushing to 65W would overheat the converter circuit in a device this compact.
Which Mode for Which Devices?
| Device | Recommended Mode | Reason |
|---|---|---|
| MacBook Pro 14/16 | Wall mode | Needs 65W+; battery mode gives 45W |
| MacBook Air (any) | Either — wall faster | 35–45W sufficient in both modes |
| iPhone / Android | Either — wall faster | Both modes exceed phone max charge rate |
| iPad Pro | Wall mode preferred | Benefits from full 65W |
| Steam Deck | Battery mode fine | 45W exceeds deck’s typical draw |
| Nintendo Switch | Battery mode | Switch only needs 18W |
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🔋 Further Reading: Read our full Anker 733 GaNPrime 65W Power Bank Review — charging benchmarks, port specs, TSA compliance, and our final verdict.
