The iPhone SE 2020 and 2022 use different battery cells: the 2020 model carries a 1,821 mAh cell and the 2022 model a larger 2,018 mAh cell. An iPhone SE battery replacement follows the standard iPhone opening sequence, and the health reading must be checked before sealing. Digi4u stocks tested iPhone SE batteries for both generations.
Last updated: August 2026 ¡¤ Reviewed by the Digi4u repair team.
About this guide: based on in-house bench testing and repair experience; confirm model specifications and grades with the supplier before ordering.
iPhone SE battery specs
The iPhone SE 2020 uses a 1,821 mAh cell (the same capacity as the iPhone 8), and the iPhone SE 2022 uses a 2,018 mAh cell. The two generations share the same body shape, but the cells are not interchangeable, so the generation must be confirmed before ordering.
| Model | Battery | Repair note |
|---|---|---|
| iPhone SE 2020 | 1,821 mAh | Same capacity as iPhone 8 |
| iPhone SE 2022 | 2,018 mAh | Larger cell, separate part |
The battery health screen in Settings gives the first signal, and a charging log confirms the pattern. Battery reporting and health indicators vary by device, software version and replacement part.
The two SE cells are the smallest in the current iPhone line, which keeps the replacement cheap and the repair fast. Original cells report health most accurately.
Signs the iPhone SE battery needs replacing
A health reading below 80 percent is a common reference point for replacement, though the right threshold depends on the device and the user’s needs, the phone shuts down above 20 percent, or the battery swells. Rapid drain and random shutdowns are the everyday signs of an ageing cell.
The physical warning signs matter most: a lifting display or a bulging back cover means a swollen battery, which should be handled carefully and replaced immediately.
iPhone SE battery replacement differences
The iPhone SE follows the standard iPhone opening sequence, with the battery-first rule and the home-button flex handled with care. The home button stays on the body, so it does not transfer with the battery.
The home-button flex runs along the bottom of the display, so it must be handled with care while the phone is open, and the shield screws should be grouped because the SE uses different lengths in the same area.
The generation confirmation is the model-specific step: the 2020 and 2022 cells have different capacities and are separate parts, so a battery ordered for the wrong generation will not fit cleanly. Check the model number in Settings > General > About before ordering.
The pairing behaviour is the model-specific note: a compatible cell may not report health the same way as an original, and the Unknown Part message can appear depending on iOS. The SE’s small shell makes the edges the most delicate part of the job.
The standard iPhone battery process is covered in the iPhone battery guide; this page focuses on the SE 2020 and 2022 generations.
Tools you need for an iPhone SE battery replacement
You need a standard phone opening kit: pentalobe and tri-point drivers, suction cup, picks, tweezers, a heat source, adhesive and a magnetic mat. The full list is on the Digi4u tools page.
The SE needs nothing special. A heating pad helps release the adhesive, and a magnetic mat keeps the shield screws organised.
How do you replace an iPhone SE battery?
Power off the phone, remove the two pentalobe screws beside the Lightning port, and heat the lower edge. Open the display from the left, disconnect the battery first, then release the screen flexes and lift the old battery with the tabs or gentle heat.
Fit the new battery, reconnect the flexes, reconnect the battery last, and test before resealing. Use fresh adhesive and apply even pressure around the edges.
Post-repair testing checklist
Test the battery health reading, charging speed, the display, the home button, Touch ID, the front camera, the speakers and the microphones. Confirm the phone charges to 100 percent and holds the charge overnight.
Run the full test while the phone is open. If the health reading does not update, the battery is not reporting correctly or the connector is loose.
iPhone SE charging and reporting notes
Both SE generations fast-charge with a 20 W or higher adapter and support 7.5 W Qi wireless charging. The 2020 model uses a 1,821 mAh cell, while the 2022 model uses a larger 2,018 mAh cell, so the generation must be confirmed before ordering.
Battery health reporting follows the same rules as the rest of the range: a paired original battery shows the percentage, while a compatible cell can trigger the Unknown Part message and hide the reading.
Digi4u workshop notes
Our bench notes: the SE’s home-button flex needs care while the phone is open, and the two generations must not share a battery order.
¡ª Digi4u repair team (bench notes)
Conclusion
The iPhone SE 2020 and 2022 are fast, low-cost battery repairs when you confirm the generation and test the health reading before sealing. Match the cell to the exact model. Repair shops can order iPhone SE batteries at Digi4u.
Frequently Asked Questions
Do the iPhone SE 2020 and 2022 use the same battery?
No. The 2020 model uses a 1,821 mAh cell and the 2022 model uses a 2,018 mAh cell, so the parts are not interchangeable.
Why is my iPhone SE battery draining fast?
Fast drain is usually a sign of an ageing cell, but check background apps and mobile signal before blaming the battery.
How do I know which SE generation I have?
Check the model number in Settings > General > About, or the A-number printed on the back, and order the battery for that generation.
