Original, compatible, high capacity: for the same phone, replacement batteries come in several versions, at very different prices. The right choice depends on the model, how the customer uses the phone and what they expect from the “Battery Health” display. This guide summarises what sets each version apart, the points to check before ordering and the fitting precautions.
At-a-glance comparison
| Version | Capacity | Health display (iPhone XS and later) | Price | Best for |
|---|---|---|---|---|
| Original | The manufacturer's capacity | Depends on where the part comes from | €€€ | Customers who want the manufacturer's part |
| Compatible | Identical to the original | “Unknown Part” message, no percentage | € | Most repairs |
| High capacity | Higher than the original | “Unknown Part” message, no percentage | €€ | Heavy users, phones kept for a long time |
| Cell only or programmable flex cable | Standard or high | Percentage retained with the original board or a programmer | €€ | Equipped workshops that want to keep the health display |
Original battery
A battery made by the manufacturer, identical to the one fitted at the factory: same cell, same capacity, same battery management electronics.
- Advantages: behaves exactly like the original.
- Limitations: highest price; on iPhone, when replaced outside Apple's network, it may also display the “Unknown Part” message, depending on the model.
- When to recommend: to customers who do not want any compatible part in their phone.
Compatible battery (standard capacity)
A new third-party battery with the model's original capacity. This is the version most widely used in repair workshops.
- Advantages: affordable price, the battery life of a new phone, available for almost every model.
- Limitations: on recent iPhones, “Unknown Part” message and health percentage unavailable (see below).
- When to recommend: in the vast majority of cases, explaining the iPhone message to the customer before the repair.
High-capacity battery
A battery whose stated capacity exceeds that of the original, thanks to higher-density cells.
- Advantages: more battery life in the same space.
- Limitations: within an identical volume, the real gain remains limited; a stated capacity far above the original should raise suspicion. Same “Unknown Part” message on recent iPhones.
- When to recommend: to heavy users who keep their phone for a long time.
iPhone: the “Unknown Part” message
Since the iPhone XS and XR, the iPhone checks the authenticity of its battery. After a replacement outside Apple's network, it displays an “Unknown Part” message or states that it is unable to verify the battery, and the health percentage (Maximum Capacity) is no longer available in Settings.
- The battery works normally: the message is for information only; it limits neither charging nor battery life.
- Keeping the health display: some batteries are supplied as a cell only, so that the circuit board from the original battery can be transferred onto it, or with a programmable flex cable; with a suitable programmer, the workshop can restore the display, depending on the model.
- Always inform the customer before the repair: it is the best way to avoid unjustified returns.
On Samsung, Xiaomi, Huawei, Honor or Oppo, a good-quality compatible battery works in the vast majority of cases without any particular message.
Points to check before ordering
- The exact model: the iPhone 13 and 13 Pro, or the Galaxy A52 and A53, do not use the same battery. Every Kintora product page lists the compatible models.
- The real capacity: a standard battery matches the model's original capacity; be wary of unrealistic capacities.
- What is supplied: mounting adhesives, and whether or not the flex cable and circuit board are included.
- Storage: a lithium battery should be stored at 40 to 60% charge, in a dry place at room temperature; avoid storing it fully charged or fully discharged for long periods.
Fitting and safety
- Discharge the phone below 25% before removing the old battery: a cell with a lower charge is less hazardous in the event of an impact.
- Never puncture or bend a battery; do not use metal tools to prise it off. Use the adhesive pull tabs or isopropyl alcohol.
- Swollen battery: do not reuse it, do not compress it, and isolate it in a non-flammable container.
- After fitting: charge fully, then use normally; a first full cycle helps the phone display an accurate charge level.
- Recycling: take used batteries to a collection point (shops that sell batteries, household waste recycling centres), never put them in with household waste.
Which battery should you recommend to your customers?
- Repair at the best price: compatible, standard capacity.
- Heavily used phone, kept for a long time: high capacity, with a realistic stated capacity.
- Recent iPhone, customer who cares about the health percentage: cell only or programmable flex cable, if the workshop is equipped.
- No compromise: original.
Frequently asked questions
How long does a phone battery last?
According to Apple, iPhone batteries are designed to retain 80% of their original capacity after 500 complete charge cycles (iPhone 14 and earlier models) or 1,000 cycles (iPhone 15 and later models), under ideal conditions. Real-world use, heat and repeated fast charging cause this figure to vary.
Does the “Unknown Part” message prevent the iPhone from being used?
No. It indicates a part that has not been verified by Apple, but the battery charges and works normally. Only the health percentage is no longer displayed, unless a cell-only battery or a battery with a programmable flex cable has been reprogrammed by the workshop.
Can a high-capacity battery damage the phone?
No, provided its stated capacity is realistic and it has the same dimensions as the original. A thicker battery, however, can put pressure on the screen or the back of the phone.
Does a new battery need calibrating?
It is not essential. A first full charge followed by normal use is enough; a full cycle simply helps the phone display an accurate charge level.
Finding the right battery
Every Kintora product page states the capacity, what is supplied and the list of compatible models.
See also: which screen quality to choose. Repair shop or reseller? Contact us for bulk orders.