The iPhone X, XS, XS Max and XR use different battery cells, so an iPhone X battery replacement starts with the exact model. The repair follows the standard iPhone opening sequence, and the health reading must be checked before sealing. Digi4u stocks tested batteries for the X generation.
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.
X generation battery specs
The iPhone X uses a 2,716 mAh cell, the XS uses 2,658 mAh, the XS Max uses 3,174 mAh and the XR uses 2,942 mAh. Confirm the exact model before ordering, because the cells are not interchangeable.
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.
Original cells report health most accurately; compatible cells are the budget option. The XR and OLED models use different cells, so confirm the exact model.
Signs the X generation 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.
X generation battery replacement differences
The X generation follows the standard iPhone opening sequence, with the battery-first rule and the shield screws grouped by position. The model-specific points are the battery connector position and the fresh adhesive pattern.
The X generation splits into two opening families: the X, XS and XS Max use OLED with a similar connector pattern, while the XR uses LCD with a different cell and a wider bezel that gives more opening room. The XS Max has the longest adhesive run.
The Face ID components sit in the top of the display on all four models, so the screen must be opened carefully and the shield screws grouped. The pairing note splits the generation: the XS, XS Max and XR pair the battery to the board, so a compatible cell can show the Unknown Part message and hide the health percentage, while the original iPhone X predates battery pairing and does not trigger that warning.
The standard iPhone battery process is covered in the iPhone battery guide; this page focuses on the X, XS and XR differences.
Tools you need for an X generation 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 X generation needs nothing special. A heating pad helps release the adhesive, and a magnetic mat keeps the shield screws organised.
How do you replace an X generation 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 front camera, Face ID, 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.
X generation charging and pairing notes
All four models fast-charge with an 18 W or higher adapter and charge wirelessly at up to 7.5 W on Qi pads; none support MagSafe. The XS Max carries the largest cell at 3,174 mAh and the XS the smallest at 2,658 mAh.
The pairing note splits the generation: the XS, XS Max and XR pair the battery to the board, so a compatible cell can show the Unknown Part message and hide the health percentage, while the original iPhone X predates battery pairing and does not trigger that warning.
Digi4u workshop notes
Our bench notes: the XR’s LCD panel opens with the same sequence as the OLED models, but its wider bezel gives more edge room for the picks.
¡ª Digi4u repair team (bench notes)
Conclusion
The iPhone X, XS, XS Max and XR are clean battery repairs when you confirm the exact model and test the health reading before sealing. Match the cell to the exact model. Repair shops can order X generation batteries by exact model at Digi4u.
Frequently Asked Questions
Do all X generation iPhones use the same battery?
No. The X, XS, XS Max and XR use different cells, so the parts are not interchangeable.
Which X generation battery is the largest?
The XS Max uses a 3,174 mAh cell, the largest of the four; the XS uses the smallest at 2,658 mAh.
Is an X generation battery replacement worth it?
Usually yes if the phone is otherwise healthy, but compare the repair cost with the phone’s current value.
