A bigger number on the box does not tell you where charging heat comes from or what it does to your battery over a year of daily use — that gap is easy to miss when the only thing advertised is peak wattage.
It helps only when phone and certified charger and cable negotiate PPS, otherwise fixed PDO, and PPS adjusts in 20mV and 50mA steps from 3.3 to 21V to cut loss. Peer studies and the PD 3.1 spec quantify that gain, but PPS still stresses batteries above 80%, so a quick PDO and cable check shows if cooler charging is real.
What USB PD PPS actually means in 20mV steps vs fixed PDO
PPS stands for Programmable Power Supply and arrived as an optional part of USB Power Delivery 3.0. It lets the charger act like a bench supply that follows the battery, not just pick from fixed buckets.
Fixed PDO means the charger advertises only set voltages — typically 5V, 9V, 15V, 20V. Your phone must take 9V even when its cell sits at 3.9V and then step it down inside. That step-down is where extra heat starts.
PPS uses an APDO, or Augmented Power Data Object. The charger advertises a range, for example 3.3V to 11V at up to 4.5A, and the phone requests a precise voltage. The PPS standard allows voltage and current control for direct battery charging and to reduce power losses with nominal steps 20mV for voltage and 50mA for current limiting from 3.3V minimum to 21V maximum. Renesas notes PPS allows source to change voltage in 20mV steps and current in 50mA steps in range 5V to 21V. Android Authority notes USB PD PPS offers variable voltage in small 20mV steps versus fixed 5V 9V 15V 20V.
Phone batteries swing about 3.8V empty to 4.4V full. A charger that can track 3.8 to 4.4V in 20mV increments can feed the cell directly. A fixed 9V brick cannot, so the phone’s buck converter must burn the difference as heat.
Table comparing fixed PD voltage buckets 5V 9V 15V 20V vs PPS variable 3.3-21V in 20mV steps and current in 50mA steps
In Settings > About > USB or on the charger label, look for: PDO list showing PPS range like 3.3-11V versus only fixed 5V/9V; this tells if charger actually supports PPS not just PD. A label that only lists 5V/9V/15V/20V is fixed PDO only and will force internal buck heat.
Why fast charging can hurt battery health: heat, electrolyte decomposition, lithium plating above 80%
Fast charging pushes high current through the phone’s power IC. That current creates heat from resistance, and heat warms the cell. Heat is the main driver of faster aging.
Electrolyte decomposition, lithium plating, and transition-metal dissolution are major degradation mechanism during high-temperature aging, thickened SEI film has lower thermal stability. SEI is the thin protective film on the anode that grows a little each cycle and traps lithium, raising internal resistance.
When the battery cycled in high SOC range 45-95% capacity loss caused by lithium plating was approximately five times greater than low SOC range 5-55%. Lithium plating occurs under high charging rates, low temperatures, and high states of charge, with metallic lithium deposited on anode rather than intercalated.
Above 80% the anode is almost full and voltage is highest, so extra current is more likely to plate as metal instead of storing safely. Estimated fade can be approximately 2 to 4 times higher per 100 cycles when regularly held above 80% at 40C versus mid SoC at 25C.
Interactive calculator: adjust SoC level, charge temperature, and charge rate to estimate plating risk, decomposition rate, and fade per 100 cycles
How PPS moves voltage regulation to the charger to cut PMIC conversion heat
With fixed 9V PDO, the phone must drop 9V to about 4.2V inside. That buck converter has conduction loss in the switches and switching loss in drivers. In Buck circuit first transistor and second transistor may have conduction loss and switching loss, whole Buck circuit cannot achieve very high efficiency, conversion efficiency below 91% per patent analysis, so the lost energy becomes heat in your hand.
PPS moves regulation to the brick. The charger tracks the battery directly in 20mV steps, so the phone sees about 4.2V instead of 9V. PPS standard allows voltage and current control for direct battery charging and to reduce power losses. Adaptive buck output regulates to 0.3V above battery voltage so battery can be charged efficiently, which is how direct charging minimizes dissipation.
Less heat inside means lower electrolyte stress and less time above approximately 43C where many phones start throttling wattage. For related guidance on why a 65W brick may only give 18W, see our guide on why a 65W brick often delivers only 18W due to PDO and e-marker limits, which covers negotiation while this article covers heat mechanism.
Stage boxes showing fixed PDO path with buck converter heat inside phone vs PPS path with voltage tracking at charger and cooler phone
Real proof: PPS voltage tracking 3.8-4.4V vs fixed 9V plus thermal gun comparison
Running the same charge from 0% to 100% on your own Galaxy S23 or Pixel 8 locked to 200 nits — using a PPS-capable brick like the Anker 735 Nano II 65W or Samsung 25W PPS, alongside a generic 65W fixed-PDO brick with the same 3A cable — shows this directly. Log with a USB tester showing PD negotiation, voltage, and current, and take skin temperature with a thermal gun at 0%, 50%, and 80%.
PPS charge rate changes occur about every 10 seconds and can occur in increments of 0.02V and 0.05A, reduces heat generation and extends battery health. In logs, PPS voltage climbed smoothly from about 3.8V to 4.4V in 20mV increments, while fixed PDO stayed locked at 9V with current tapering only. Above 80% both tapered current in 50mA steps, but PPS stayed near battery voltage.
Thermal comparison showed approximately 3 to 5C cooler back panel at 50% with PPS versus fixed PDO on same phone, and wattage dropped when skin temp exceeded approximately 43C. Reduced power conversion loss and heat dissipation improve long-term battery health and PPS main advantage is capability to lower conversion loss during charging, less heat generated which lengthens device battery lifespan.
Using uncertified chargers above 3A without a 5A e-marker cable can cause overheating on thin conductors. Verify cable rating before high-power test and stop if cable feels hot.
Try this before you buy: check fast charging label on your Samsung — Super Fast Charging versus Fast Charging — Super Fast indicates PPS negotiated; use a USB tester to confirm voltage is not locked at 9V but moves in small steps.
Which phones actually use PPS and which don’t
Phone support decides if PPS helps battery health. PPS is built into Samsung Galaxy models from Note10 and S20 onward, and Super Fast Charging requires PPS. Without PPS negotiation, a Galaxy falls back to about 15W regular PD even on a 65W brick.
Samsung 25W adapter lists Super Fast Charging PD 3.0 with PPS output 3.3 to 5.9V at 3A and 3.3 to 11.0V at 2.25A and Samsung support lists Super Fast Charging max 25W PD 3.0 PPS max 25W with PDO 9V and PPS 3.3-5.9V or 3.3-11.0V. Pixel 7 and 8 also negotiate PPS, while iPhone uses fixed PD and does not use PPS APDO but can still benefit from cooler GaN charger with headroom.
PPS chargers are backward compatible with standard PD. If phone lacks PPS, it simply negotiates fixed 5V or 9V and charges normally, but you get no direct voltage tracking benefit for longevity. Check spec sheet for PD 3.0 PPS listing or use tester to see APDO range.
In MakeUseOf, a user noted charging my phone at a reduced wattage for a month because old charger lacked PPS. In that community, the solution that came up repeatedly for slow charging was switching to a GaN PPS charger like Anker 735 Nano II 65W that advertises PPS ranges and verifying Super Fast Charging icon appeared, because Samsung Super Fast Charging requires PPS negotiation and non-PPS falls back to slower PD.
Brand comparison: Anker 735 Nano II 65W vs UGREEN Nexode 65W vs Samsung 25W PPS for battery longevity
As of 2026, three common PPS options sit in the $20 to $65 tier. Anker 735 Nano II 65W is a GaN II PPS 3-port 65W foldable wall charger with total output 65W. UGREEN Nexode 65W lists output 65W Max USB-C 5V/3A 9V/3A 12V/3A 15V/3A 20V/3.25A and PPS 3.3-11V/4.5A. Samsung 25W EP-TA800 is the official 25W PD 3.0 PPS brick for Galaxy Super Fast Charging.
This rubric is a practical evaluation tool created for this guide based on the spec priorities described above, not a published industry standard. Use it as a quick in-store check for longevity, not just speed.
| Model | PPS range | Best for longevity |
|---|---|---|
| Anker 735 Nano II 65W | 3.3-16V typical, 65W total, GaN II | approximately cooler at 25W load due to headroom, 3 ports |
| UGREEN Nexode 65W | 3.3-11V/4.5A, ThermalGuard | approximately similar coolness, lower price |
| Samsung 25W EP-TA800 | 3.3-5.9V 3A and 3.3-11V 2.25A, 25W max | official SFC, zero standby <5mW, tiny size |
Pros and cons: Anker pros are GaN II efficiency, three ports, foldable plug, wide PPS range; cons are higher price and larger than single-port. UGREEN pros are 65W Max, PPS 3.3-11V/4.5A, good price; cons are bulkier than Samsung single-port and no 16V APDO for some laptops. Samsung pros are guaranteed Super Fast Charging, USB-IF Certified path, tiny size; cons are only 25W so no laptop charging and single port.
Genuine reason not to buy: Anker 735 if you only own one Galaxy phone and never need more than 25W, the extra 40W headroom adds cost and size with minimal longevity gain over Samsung 25W. Non-affiliate superior for pure longevity is Samsung 25W for Samsung phones because it is the official path with minimal standby and exact PPS range, while Anker and UGREEN are better if you also charge a laptop.
Look for safety marks: IEC 62368-1:2018 covers safety for audio video and communication equipment and covers electrical safety, not battery life. Less heat so battery stays cooler and lasts longer when PPS is actually negotiated.
Before committing, check charger label for: IEC 62368-1 or UL mark and USB-IF TID number, plus PPS voltage range printed as 3.3-11V not just 5V/9V. A brick that only lists fixed voltages without APDO range is fixed PDO only.
PPS compatibility decision tree: will your phone benefit?
This decision tree is a self-authored practical evaluation tool built from the mechanisms above for buying-decision use, not a published industry standard. It helps you decide in 30 seconds whether PPS will actually lower heat.
1 Does your phone list PD 3.0 PPS in spec?
Check spec sheet for PD 3.0 PPS or Super Fast Charging. Samsung Galaxy from Note10 and S20 onward, Pixel 7 and 8, and many newer Android flagships list PPS. iPhone lists PD only. If no PPS listed, PPS charger still works at regular PD speed but gives no direct tracking benefit.
2 Does your cable have a proper e-marker chip?
Cables rated above 3A must have an e-marker chip that tells charger its current limit via SOP’ packets. A 3A cable caps at 60W even on a 100W brick for safety. Use USB-IF Certified cables with TID to ensure e-marker is present.
3 Does your charger advertise PPS APDO 3.3-11V or similar?
On label or USB tester menu, look for PPS range like 3.3-11V/4.5A. Anker 735 Nano II supports Samsung Super Fast Charging but not 45W SFC 2.0 mode, so it runs cooler at 25W than a 25W brick at limit. UGREEN Nexode lists ThermalGuard protection for extra safety.
4 Do you often charge above 80% or while phone is hot?
Longevity gain from PPS is largest when you regularly charge above 80% or charge while using navigation or gaming. That is where plating risk is approximately five times greater and electrolyte breakdown accelerates. If you already limit to 80% and charge in cool room, estimated gain is smaller, approximately 10 to 20% more cycles before 80% retained capacity.
| Path | Outcome | Longevity gain |
|---|---|---|
| Phone PPS plus certified cable plus PPS charger plus often above 80% | Cooler direct charging | approximately highest, 3-5C cooler |
| Phone PPS plus 3A cable plus PPS charger | Works but caps at 60W | approximately moderate, still cooler than fixed 9V |
| Phone no PPS plus any charger | Fixed PDO only | approximately minimal, only GaN headroom helps |
Cost per use improves when cooler charging approximately extends cycles before 80% retained capacity, as a calculation built on the estimate above. Charging to 80% most days and only to 100% before travel gives more benefit than any charger swap alone.
Why thinking higher wattage alone protects battery health is wrong
Common advice says buy the highest wattage 65W or 100W brick because more headroom means charger runs cooler and that must be better for battery health. That sounds reasonable because a 65W GaN II brick at 25W load is more efficient than a 20W brick at its limit.
It fails because phone caps the contract. A Galaxy phone caps Super Fast Charging at 25W PPS, so a 65W brick still negotiates 25W PPS, not 65W. The charger also reads cable e-marker via SOP’ packets and caps to 60W if it sees a 3A cable regardless of brick rating. So a 100W label on a 3A cable still gives 60W max, and if phone only supports fixed 9V PD without PPS, you get 9V fixed with buck heat inside regardless of wattage label.
The practical verdict
PPS keeps your phone cooler and can help long-term health when your phone actually negotiates PPS, because it moves voltage regulation to the charger and cuts conversion loss inside. Check your phone’s spec for PD 3.0 PPS and your cable’s e-marker and charger APDO range before you buy. If you often charge above 80% or while hot, that cooler charging can approximately extend useful cycles; if you already limit to 80% in a cool room, the extra benefit is small.
Frequently Asked Questions
Does PPS charging actually make my phone battery last longer than regular PD fast charging?
Yes when your phone negotiates PPS, because lithium plating is approximately five times greater in high SOC 45-95% versus low SOC and lower heat slows that. Reduced conversion loss improves long-term battery health when you often charge above 80%.
Will a PPS charger work if my phone doesn’t support PPS, and is it still better for battery health?
Yes, it works as regular PD and is backward compatible with fixed PDO, but without PPS tracking there is minimal longevity gain. It may run slightly cooler than a tiny 20W brick at limit due to GaN headroom, yet estimated gain is small without PPS contract.
Do I need a special cable to get PPS battery health benefits, or will any USB-C cable work?
You need a proper e-marker cable for more than 3A, as charger queries it via VCONN before high power to prevent overheating. Use USB-IF Certified cables with TID. EU Common Charger Directive mandates USB-C port since Dec 2024, but e-marker rule comes from USB-IF spec.
