iPhone 17 Series 40W Charger: What You Need to Know (2025 Guide)
·Apple released a new power adapter called the “40W Dynamic Power Adapter with 60W Max” alongside iPhone 17 / 17 Pro / Pro Max.
·Although marketed as a 40W adapter, it supports peak output up to ~60W in short bursts (≈ 18 minutes) under certain conditions. After that, the power steps back (“thermal / safety throttling”) to maintain.
·Size, build & design: uses GaN tech, compact “Dynamic Power Adapter”, better efficiency, presumably with higher voltage regulation under the new standard.
2. What is AVS Protocol & Its Role
·AVS = Adjustable Voltage Supply. It is part of the USB Power Delivery (PD) standard—specifically PD 3.2 (for Standard Power Range, SPR) with extended features.
·AVS allows more granular voltage selection (e.g. 100mV steps), letting the charger deliver voltage that more precisely matches what the device needs, reducing inefficiencies and heat.
·In short, AVS helps make fast charging more efficient, cooler, and safer than older fixed-voltage PD or simpler PD versions without AVS. It works in negotiation between device & charger.
3. Relationship Between PD and AVS Protocols
| Protocol | Abbreviation | Introdued In | Key Features | How It Relates to iPhone 17 Charging |
| PD (Power Delivery) | USB-PD | PD 3.0 / earlier | Standardized higher power charging; various voltage levels; PPS in earlier PD versions for fine control of voltage under 100W. | iPhone 17 supports PD 3.2 |
| AVS | Adjustable Voltage Supply | USB PD 3.2 (SPR AVS) |
Fine voltage steps, better power matching, more efficient thermal behavior. | The new Apple 40W adapter implements AVS, enabling the 50% in 20 minutes claim. |
·PPS (Programmable Power Supply), part of earlier PD standards, provides dynamic voltage/current adjustments. AVS is more about precise, more static negotiated voltage, yet still offering better matching than older PD only or fixed-voltage chargers.
4. Review & Testing: How the 40W Charger Performs
·Early hands-on tests (e.g. from Reddit users) show: the 40W charger can sustain higher output (≈ 60W) for about 18 minutes before dropping to ~40W due to thermal limiting.
·Device-battery temperature during tests reached ~60–62°C under peak conditions, which is relatively hot but not disastrous for short durations.
·Charging speed: Apple claims ~50% battery in 20 minutes using this adapter + compatible cable + iPhone 17. Tests seem to support that when conditions are optimal.
5. Advantages & Disadvantages of iPhone 17’s 40W Charger
👍 Advantages
·Faster charging: iPhone 17 50% in ~20 minutes. （Charges mobile phones at about 40W. For older iPhones, the charging power will not increase.）
·Peak-power boost (up to 60W) helps in short bursts, useful for quick top-ups / high load conditions. (Up to 55W when charging a MacBook)
·Use of AVS improves voltage matching, reduces heat buildup, more efficient overall.
·Apple's charger likely optimized for iPhone battery health and safety (thermal controls, dynamic regulation).
👎 Disadvantages
·For older iPhones, the charging power will not increase.
·Sustained 60W output is limited in time; beyond that it throttles to 40W(iPhone 17 only). So for long use (gaming, video, etc.) the benefit is less.
·AVS protocol is new; very few third-party chargers currently support PD 3.2 SPR AVS. (Q&A: Can a regular 45W charger provide 40W charging for the iPhone 17?)
·Higher cost; availability limited in some regions. Also cable & adapter quality (USB-C cable rating, connector, etc.) can affect performance.
6. How to Choose & Recommendations
• Purchase an original Apple 40W charger or other USB-PD 3.2 SPR AVS compliant charger.
• 45W GaN charger only needs to support PD 15V or higher to provide 40W charging for the iPhone 17.
• Use a good USB-C cable rated for enough current & voltage (ideally 100W rated, high quality) to avoid bottlenecks.
• Prefer chargers with good thermal design (GaN tech, heat dissipation) to manage heating during peak periods.
• Price & Usage: If you're not a brand enthusiast or don't own multiple Apple devices, other high-quality 45W or 65W GaN chargers are a good alternative.
• For regular usage, 45W 35W or 25W chargers are still fine.
7. FAQ (Frequently Asked Questions)
Q1: Do I need Apple’s new 40W adapter to get 50% charge in 20 minutes?
A1: Besides Apple's original 40W dynamic power adapter, a 45W GaN charger can also achieve 40W charging power as long as it supports 15V or higher Power Delivery (PD) charging.
Q2: Will older USB-C PD chargers still charge iPhone 17?
A2: Yes — they’ll still work, but charging may be slower (e.g. 50% in ~30 minutes rather than 20) due to lack of AVS or limited PD spec.
Q3: Is AVS better than PPS?
A3: AVS offers more precise regulated voltage under PD 3.2 for many devices, allowing smoother, cooler charging. PPS still has advantages in some Android devices for real-time control and very fine voltage/current granularity.
Q4: Does the 40W adapter always deliver 60W?
A4: No — the 60W is a peak, short burst output. The charger will drop back to ~40W under sustained load or once thermal limits are reached.(When charging a MacBook, the output power can remain around 55W).
Q5: Will third-party chargers get AVS soon?
A5: Possibly—many manufacturers are already testing(New Apple 40W charger) and developing adapters compatible with PD 3.2 AVS technology.
However, Common 45W and 65W chargers can also provide 40W charging.
8. Conclusion
The iPhone 17’s new 40W Dynamic Power Adapter with 60W Max and AVS represents a meaningful step forward: faster, smarter, more efficient charging. For Apple users who often top up quickly or rely on fast power, it’s a strong upgrade(A little bit).
In terms of value for money, a high-quality 45W or 65W certified charger is an ideal choice.
Read More
Read More
Read More
·Early hands-on tests (e.g. from Reddit users) show: the 40W charger can sustain higher output (≈ 60W) for about 18 minutes before dropping to ~40W due to thermal limiting.
·Device-battery temperature during tests reached ~60–62°C under peak conditions, which is relatively hot but not disastrous for short durations.
·Charging speed: Apple claims ~50% battery in 20 minutes using this adapter + compatible cable + iPhone 17. Tests seem to support that when conditions are optimal.
5. Advantages & Disadvantages of iPhone 17’s 40W Charger
👍 Advantages
·Faster charging: iPhone 17 50% in ~20 minutes. （Charges mobile phones at about 40W. For older iPhones, the charging power will not increase.）
·Peak-power boost (up to 60W) helps in short bursts, useful for quick top-ups / high load conditions. (Up to 55W when charging a MacBook)
·Use of AVS improves voltage matching, reduces heat buildup, more efficient overall.
·Apple's charger likely optimized for iPhone battery health and safety (thermal controls, dynamic regulation).
👎 Disadvantages
·For older iPhones, the charging power will not increase.
·Sustained 60W output is limited in time; beyond that it throttles to 40W(iPhone 17 only). So for long use (gaming, video, etc.) the benefit is less.
·AVS protocol is new; very few third-party chargers currently support PD 3.2 SPR AVS. (Q&A: Can a regular 45W charger provide 40W charging for the iPhone 17?)
·Higher cost; availability limited in some regions. Also cable & adapter quality (USB-C cable rating, connector, etc.) can affect performance.
6. How to Choose & Recommendations
• Purchase an original Apple 40W charger or other USB-PD 3.2 SPR AVS compliant charger.
• 45W GaN charger only needs to support PD 15V or higher to provide 40W charging for the iPhone 17.
• Use a good USB-C cable rated for enough current & voltage (ideally 100W rated, high quality) to avoid bottlenecks.
• Prefer chargers with good thermal design (GaN tech, heat dissipation) to manage heating during peak periods.
• Price & Usage: If you're not a brand enthusiast or don't own multiple Apple devices, other high-quality 45W or 65W GaN chargers are a good alternative.
• For regular usage, 45W 35W or 25W chargers are still fine.
7. FAQ (Frequently Asked Questions)
Q1: Do I need Apple’s new 40W adapter to get 50% charge in 20 minutes?
A1: Besides Apple's original 40W dynamic power adapter, a 45W GaN charger can also achieve 40W charging power as long as it supports 15V or higher Power Delivery (PD) charging.
Q2: Will older USB-C PD chargers still charge iPhone 17?
A2: Yes — they’ll still work, but charging may be slower (e.g. 50% in ~30 minutes rather than 20) due to lack of AVS or limited PD spec.
Q3: Is AVS better than PPS?
A3: AVS offers more precise regulated voltage under PD 3.2 for many devices, allowing smoother, cooler charging. PPS still has advantages in some Android devices for real-time control and very fine voltage/current granularity.
Q4: Does the 40W adapter always deliver 60W?
A4: No — the 60W is a peak, short burst output. The charger will drop back to ~40W under sustained load or once thermal limits are reached.(When charging a MacBook, the output power can remain around 55W).
Q5: Will third-party chargers get AVS soon?
A5: Possibly—many manufacturers are already testing(New Apple 40W charger) and developing adapters compatible with PD 3.2 AVS technology.
However, Common 45W and 65W chargers can also provide 40W charging.
8. Conclusion
The iPhone 17’s new 40W Dynamic Power Adapter with 60W Max and AVS represents a meaningful step forward: faster, smarter, more efficient charging. For Apple users who often top up quickly or rely on fast power, it’s a strong upgrade(A little bit).
In terms of value for money, a high-quality 45W or 65W certified charger is an ideal choice.
Read More
Read More
Read More