- This is a wholesale grading guide for traders moving iPhone lots, not a consumer battery explainer.
- Battery health, shown as maximum capacity, compares a battery's current full charge to its original factory capacity.
- Apple designs iPhone 14 and earlier batteries to hold 80 percent of original capacity at 500 charge cycles, and iPhone 15 and later at 1000 cycles, and treats a battery below 80 percent within warranty as serviceable.
- Because of that threshold, 80 percent became the wholesale floor, and lots are specced with shorthand like BH80+ or BH85+.
- Battery health and cosmetic grade are two separate axes: a clean Grade A body can still carry a weak battery, and the price has to reflect both.
The short answer
In iPhone wholesale, 80 percent battery health is the de facto floor because Apple designs its batteries around that number and treats a battery below it, within warranty, as eligible for service. Battery health, or maximum capacity, is the ratio of a battery's current full-charge capacity to its original factory capacity. Traders spec lots with shorthand like BH80+ or BH85+, check each unit at intake through the phone's own settings or a bulk diagnostics platform, and price battery health as a separate axis from cosmetic grade. A phone with a pristine body and a tired battery is still a discounted phone.
Who this guide is for, and what battery health measures
If you are checking the battery on one phone you own, the reading in Settings answers your question. This guide is for the trader on the other side of that transaction, the one buying or selling iPhones in bulk, where battery health is a line item that moves the price of an entire lot. On an iPhone, battery health is surfaced as maximum capacity: the percentage of the battery's original, factory-fresh capacity that it can still hold on a full charge. A phone at 100 percent holds a full design charge; a phone at 82 percent holds 82 percent of what it did new. It is a wear measure, not a charge level, and it only ever goes down.
Maximum capacity falls with charge cycles and age. That decline is normal and expected, which is exactly why the trade needs a shared number to price it. Battery health sits alongside cosmetic condition and functional testing as one of the three things a buyer wants confirmed before money moves, a set covered end to end in how to grade used smartphones for wholesale.
What Apple's specification actually says
According to Apple's battery documentation, iPhone 14 and earlier models are designed to retain up to 80 percent of their original capacity at 500 complete charge cycles under ideal conditions, and iPhone 15 and later models are designed to retain 80 percent at 1000 cycles. Apple also treats a battery that falls below 80 percent of original capacity within the warranty period as covered by its warranty for a defective battery.
Two facts in that specification set the whole tone of the trade. First, 80 percent is the number Apple itself engineers toward, which is why it, and not 75 or 85, became the industry reference point. Second, the cycle count that reaches that threshold roughly doubled from iPhone 14 to iPhone 15, per Apple's own figures, which means a newer model at a given battery health has typically done more work to get there. That matters when you compare two lots at the same stated battery health but different model generations.
Apple's warranty framing reinforces the floor. Because Apple considers a battery defective if it drops below 80 percent of original capacity inside the standard one-year warranty, 80 percent reads across the industry as the line between a healthy battery and one that has entered its service window. This is Apple's own consumer language, and it is worth stating plainly that Aikon is a discovery platform and offers no warranty of its own. Any warranty on a traded device is either the manufacturer's or a term the two trading companies agree between themselves.
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Why 80 percent became the wholesale floor
80 percent is the wholesale floor because it is the point Apple designs to, the point its warranty treats as defective, and the point below which a phone's real-world runtime starts to disappoint an end user. A shared, vendor-defined number is what lets strangers trade lots by the hundred.
Wholesale runs on shared shorthand. A buyer who cannot inspect every unit before purchase needs a single figure that means the same thing to both sides, and 80 percent is that figure precisely because Apple defined it. Below 80 percent, retail buyers notice the shorter day and start asking for replacements, so a phone under the line either gets a battery swap before resale or moves at a lower tier. Above it, the battery is generally accepted as good enough to sell on without service. That clean split is why lots are so often quoted against the 80 mark.
How battery health and cosmetic grade interact
Cosmetic grade and battery health are independent. A Grade A body with an 80 percent battery and a Grade A body with a 78 percent battery are two different products at two different prices, even though they look identical on a shelf.
New traders sometimes assume a clean phone is a strong phone. It is not. Cosmetic grade describes the housing and screen; battery health describes the cell inside. The two wear on different clocks. A lightly used phone can have a spotless body but a battery worn down by heavy daily charging, and a scuffed phone can carry a near-full battery. That is why serious specs state both.
Take a concrete case. A Grade A iPhone with a 78 percent battery has a pristine exterior but a cell already below the 80 percent line. In practice it will not sell as a straight Grade A unit: either the price steps down to account for a battery replacement the next seller will have to fund, or the battery is swapped and the cost of that swap is priced in. The same phone at 82 percent needs neither adjustment. The cosmetic grade did not change; the battery moved it across a line that has real money attached. For where the cosmetic floor itself sits, see the Grade C entry.
How lots are specced: BH80+, BH85+
Sellers spec battery health with a shorthand floor, most commonly BH80+ or BH85+, meaning every unit in the lot is at or above that maximum capacity. The higher the floor, the higher the price, because fewer units need a battery swap downstream.
You will see battery health written as a minimum threshold attached to a lot. BH80+ means no unit below 80 percent; BH85+ raises the bar to 85. Some sellers list mixed lots with a stated distribution, others sort strictly to a floor. A tighter floor is worth more because it transfers less battery risk to the buyer. When you read a lot description, treat the battery floor as a hard spec, not a hope, and confirm it is inspectable on arrival. Reading the rest of an offer is covered in the shipment inspection checklist.
- BH85+ or higher: premium battery tier, minimal service risk, priced accordingly.
- BH80+: the standard floor, aligned with Apple's own threshold, resalable without service in most cases.
- Below 80 or unspecified: assume a battery swap is needed and price it in. An unspecified battery floor is itself a red flag.
How battery health is checked at intake in bulk
At small volumes, battery health is read from Settings on each phone. At wholesale volumes, traders run commercial diagnostics platforms that batch-test many units at once and produce a standardized battery health figure per device.
On any individual iPhone, the reading lives in Settings, under Battery, then Battery Health and Charging, as a maximum capacity percentage. That works for spot checks. For a lot of several hundred, hand-reading every phone is too slow and too easy to fudge, so intake moves to automated tools. Commercial diagnostics and certification platforms such as Phonecheck and Blancco test many connected devices in parallel, pulling battery health along with dozens of other component checks and lock status, then output a per-device report. Those reports are what let a buyer accept a battery floor without opening every box, because the figure is machine-read and logged rather than eyeballed.
Two cautions at intake. Battery health can be misreported on devices with non-genuine batteries or altered firmware, so the diagnostics tool's authenticity check matters as much as the number. And a battery health reading is a snapshot: it should be captured at intake and again before shipping, so a lot cannot quietly drift or be swapped between inspection and delivery.
The economics of a battery service
Whether to replace a battery before resale is a margin decision: the cost of the swap against the price uplift from moving a unit up a tier. There is no universal answer, only the arithmetic on your specific lot.
A battery below the floor can either be discounted or replaced. Apple offers an out-of-warranty battery service, and third-party replacement is generally cheaper, though quality and warranty vary and a non-genuine cell can itself flag on diagnostics. The decision is straightforward to frame even when the numbers move: if swapping a battery lifts a unit into a tier that sells for more than the cost of the swap plus labor, it pays; if not, sell it as-is at the lower tier and let the buyer decide. What you should never do is quietly present a sub-floor battery as if it met the spec. For how conditions and pricing tiers fit together, see refurbished versus used versus new-in-box and the trade-level view in how to buy iPhones wholesale.
iPad and Android equivalents
iPads expose maximum capacity much like iPhones. Android has historically had no single, standardized battery health metric, though that is changing, so Android lots need a tool-reported figure rather than a universal built-in reading.
iPads report battery health as maximum capacity in Settings, so the same 80 percent logic and the same BH-floor shorthand carry over to iPad lots. Android is the harder case. There has been no universal, standardized battery health readout across Android devices the way iOS provides one. Recent devices have narrowed the gap: Google Pixel models from the Pixel 6 onward expose a maximum capacity reading, and Samsung surfaces a battery health percentage on recent One UI versions. Industry reporting also notes that Android 16 began mandating a battery health percentage in settings for certified devices in 2026. Until such a standard is universal across the installed base, Android battery health in wholesale leans on the same commercial diagnostics platforms used for iPhones, which read the cell directly rather than relying on a built-in number that may not exist. The practical rule holds across all of them: never accept a battery claim you cannot verify.