Product Reports disagree 3 publishers 2 min read Published Sep 19, 2026, 4:46 AM PDT Updated Sep 25, 2026, 4:29 AM PDT

Trading in an iPhone 18 Pro Max now starts with draining the battery below 20 Wh

Apple's firmware holds the new Pro Max under the 20 Wh single-cell threshold until a buyer activates it, and a Prepare to Ship option in Settings puts the phone back under the limit before a repair, return or trade-in.

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What happened

Shipping the phone for repair, trade-in, return, sale or as a gift now requires a new Prepare to Ship option under Settings, General, Transfer or Reset iPhone.
Prepare to Ship discharges the battery below 20 Wh and sets a charge limit to hold it there, and Apple says the handset may become warmer than usual while it drains.
MacRumors reports the preparation can be undone from the same Settings screen, though depending on the reason the user picked there may be a 14-day wait before it can be disabled.

Why it matters

What it limits constraint The compliance step runs on the owner's phone. A repair or trade-in pipeline now depends on work that cannot be done once the box is sealed.
Who has to decide decision Intake scripts and trade-in instructions have to spell out the order of operations, because Apple's own guidance says an erased phone cannot be used while it drains.
Who's exposed exposure A customer who prepares a phone to ship and then keeps it may sit on a capped battery for two weeks before the undo becomes available.

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Confirmed2 publishers

A trade-in usually runs in one order: wipe the phone, then put it in the prepaid envelope. On an iPhone 18 Pro Max, that order breaks. Apple's support document, quoted by 9to5Mac, says "If you erase your iPhone, you won't be able to use it while the battery discharges" ^[7], and the same document puts the drain at "only a few minutes" in the best case but "up to a couple of hours" if you start from a full charge ^[6]. Discharge first. Erase second ^[15].

The threshold behind all of this is 20 Wh. Apple says the Pro Max battery is over that ^[1], and that most countries and regions have additional shipping requirements for products "with a single-cell battery over 20 Wh," per 9to5Mac's account of the document ^[10]. The company's answer is software: an "innovative battery-firmware solution" that holds capacity below 20 Wh from manufacture through transport out of the factory, with the cap lifted when the buyer activates the phone ^[2]. The unit sitting in a shipping carton is a sub-20 Wh device by firmware, and becomes a full-capacity one on activation ^[2].

Nobody at an intake desk can measure watt-hours, and they do not have to. When the process finishes, Settings shows "Ready to Ship" with a red badge ^[9]. A customer can photograph that screen and a receiving clerk can check it. MacRumors notes that sealed, unactivated stock needs nothing, because it is already limited to under 20 Wh ^[11]. Apple says the phone is safe for shipping and air travel, and that the limit is there to meet shipping requirements ^[13].

Two questions sort the return flows for anyone who runs one. Can the device still reach Settings, and who is holding it when the label goes on. Customer-held and working is routine: send the instructions with the label ^[5]. Depot-held and working is fine too, as long as staff run the step before packing. The hard box is a device in a customer's hands that cannot be used, either because it was erased first or because it will not boot; neither report describes what Apple advises there. The scope is at least narrow. MacRumors says no other iPhone has a single-cell battery over 20 Wh, so the procedure applies to this model alone ^[14].

What to watch

Whether carrier and third-party trade-in programs add a "Ready to Ship" check to their intake steps or start rejecting unprepared units on arrival.
Whether Apple publishes guidance for an iPhone 18 Pro Max that cannot reach Settings, since Prepare to Ship runs inside the Settings app.
Which reasons for shipping trigger the 14-day wait MacRumors describes before the preparation can be undone.

Clarity's read

What the record supports and how the coverage leans. The claims behind it follow.

Reality

Evidence62
Adoption: Not scored
Hype gap+15
Incentives40
Confidence60

Perspective Coverage

3 publishers

Builder: Builder 30%
Operator: Operator 60%
Investor: Investor 10%

Why these scores

Claim ledger

Ranked by verification strength, evidence, and original report placement.

[1]
Apple says the iPhone 18 Pro Max has a battery capacity over 20 watt-hours (Wh).
Reported Supported Source: Apple, via 9to5MacView cited source
[2]
Apple's support document says: "To address these requirements, iPhone 18 Pro Max uses an innovative battery-firmware solution that limits battery capacity to below 20 Wh from the time it's manufactured through its transport from the factory. When you activate your iPhone, the limit is removed and the battery's full charging capacity is available."
Reported Supported Source: Apple support document, quoted by 9to5MacView cited source
[3]
The shipping requirements also apply to shipping the iPhone 18 Pro Max for repair, trading it in, returning it, selling it, or gifting it to someone else.
Reported SupportedView cited source
[4]
Apple has added a "Prepare to Ship" feature that discharges the device's battery below 20 Wh and sets a charge limit to keep it below that threshold.
Reported SupportedView cited source
[5]
Prepare to Ship is reached by opening Settings, tapping General, tapping Transfer or Reset iPhone, then tapping Prepare to Ship.
Reported SupportedView cited source
[6]
Apple's document says: "You can use your device as usual while your iPhone 18 Pro Max discharges. This might take only a few minutes, but if you start with a full charge, it can take up to a couple of hours."
Reported Supported Source: Apple support document, quoted by 9to5MacView cited source
[7]
Apple's document says: "If you erase your iPhone, you won't be able to use it while the battery discharges."
Reported Supported Source: Apple support document, quoted by 9to5MacView cited source
[8]
Apple says the iPhone might become warmer than usual while the battery discharges, that this is expected, and that it will cool down again when ready to ship.
Reported SupportedView cited source
[9]
When the Prepare to Ship process is complete, the Settings app displays "Ready to Ship" with a red badge.
Reported SupportedView cited source
[10]
Apple says most countries and regions have additional shipping requirements for products "with a single-cell battery over 20 Wh."
Reported Supported Source: Apple support document, via 9to5MacView cited source
[11]
iPhones that are not yet activated or still in the box do not need Prepare to Ship because they are already limited to under 20 Wh.
Reported SupportedView cited source
[12]
Apple described the battery firmware limit and the shipping requirement in a new support document, which 9to5Mac reported was published the day of its story.
Reported SupportedView cited source
[13]
Apple emphasizes that the iPhone 18 Pro Max is safe for shipping and air travel, and that the limit was added to meet shipping requirements.
Reported SupportedView cited source
[14]
No other iPhones have a single-cell battery over 20 Wh, so the Prepare to Ship procedure is not needed for other models.
Reported Supported Source: MacRumorsView cited source
[15]
Because an erased iPhone cannot be used while its battery discharges, and a discharge from a full charge can take up to a couple of hours, running Prepare to Ship before erasing keeps the device usable during the drain.
Derived Supported
[16]
MacRumors reports that Prepare to Ship can be undone from the same section of Settings, but that depending on the reason the user selected there could be a 14-day waiting period before it can be disabled.
Reported Contested Source: MacRumorsView cited source
[17]
A 14-day waiting period is two weeks.
Derived Contested
[18]
9to5Mac reports the iPhone 18 Pro Max offers a large jump in battery life partly because the battery itself is physically larger.
Reported InsufficientView cited source

Sources

3 independent publishers whose own reporting we read for this story.

9to5mac.com
1 article · September 19, 2026
iPhone 18 Pro Max’s battery is so big Apple had to add this new feature to iOS 27
macrumors.com
1 article · September 18, 2026
iPhone 18 Pro Max Requires 'Prepare to Ship' Battery Drain Before Shipping
theverge.com
1 article · September 21, 2026
Apple’s clever software solution lets iPhone batteries skirt shipping limits

Clarity analysis

How the coverage leans and what the record actually supports. Read the methodology

Perspective Coverage

How much of the coverage speaks to builders, operators and investors. It measures emphasis, not whether the story is right.

Builder30%

The engineering in this story is a firmware cap on a single cell. The Verge puts unlocked capacity at about 21.75 Wh for US eSIM-only models and 21.06 Wh for European models with a SIM tray, so the cap trims only one to two watt-hours. The Verge also says Android makers tend to split batteries into two cells outside Asia to meet the same rule, a route it calls costlier and less space-efficient. Our coverage does not explain how the firmware enforces the cap or how a carrier would verify it.

Operator60%

Anyone handling repairs, returns or trade-ins now has an extra step for an activated iPhone 18 Pro Max: Settings > General > Transfer or Reset iPhone > Prepare to Ship. Apple's document, quoted by 9to5Mac, says the drain can take up to a couple of hours from full and that an erased phone can't be used while it discharges. Running it before a wipe saves that wait. The accounts split on undoing it. MacRumors describes a possible 14-day wait depending on the reason chosen, and The Verge says it can be disabled at any time.

Investor10%

There is little here to price. None of the three outlets reports costs, volumes or sales. The only commercial argument is The Verge's: dual-cell designs cost more and take more space, and rivals may copy Apple's firmware approach if it works. That is the reporter's projection, and no manufacturer is quoted.

Reality

Evidence, adoption, hype gap, incentives and confidence, each read independently from the current record on the scale shown beneath it. How these are measured.

Evidence62: 0100
One Apple page, repeated three times
Every procedural detail goes back to a single Apple support document. Three outlets restate it closely, so their agreement is not independent checking. The Verge's per-region capacity figures appear without a stated source, and the undo behaviour differs between accounts.
AdoptionNot scored: Shipped on every unit, use unmeasured
By Apple's description the cap is on every iPhone 18 Pro Max and Prepare to Ship is in Settings. Our coverage has no sales numbers and no data on how often owners or service centres run the step.
Hype gap+15: −100 understated0 aligned+100 overstated
Mild lift from Apple's own wording
The headlines borrow Apple's word 'innovative', and The Verge calls the fix 'clever'. The substance is a charge cap and a Settings entry that trims one to two watt-hours before a phone is boxed. 9to5Mac's claim of a 'huge jump in battery life' comes with no battery-life figure.
Incentives40: 0100
Apple wrote the only primary source
Apple authored the document all three outlets rely on. It has reason to present a regulatory workaround as innovative and to stress that the phone is safe for air travel. According to The Verge, the approach also spares Apple the cost and space of a dual-cell battery. 9to5Mac's piece ends with affiliate accessory links unrelated to its claims.
Confidence60: 0100
Settled mechanism, unsettled details
How the cap works is consistent in all three reports. The details a returns desk would act on are the least settled: MacRumors and The Verge disagree on the undo rules, and only The Verge gives capacity numbers.

Topics and entities

Topics

Lithium battery shipping rules
Device trade-in and repair logistics
Smartphone batteries