A Galaxy S24 battery replacement should begin with the exact model number, not “S24 series”. The Galaxy S24, S24+, S24 Ultra and S24 FE use different batteries and model-specific disassembly details. For the standard UK Galaxy S24, Samsung identifies the model family as SM-S921; use the repair guide supplied on the Samsung UK support page for the precise device in front of you.
(Last modified date: September 11, 2026)
Key takeaways
- Confirm the full model code in Settings or on the device before ordering a battery.
- Check whether software, charging equipment or app activity explains the symptom before replacing hardware.
- Prepare the battery, model-specific adhesives and every tool in the current repair guide before opening the phone.
- A new adhesive seal does not justify promising restored factory water resistance.
Is the battery actually causing the problem?
Fast drain, unexpected shutdowns and charging problems can involve the battery, but they are not battery-only diagnoses. In Samsung Members, open Support and use the phone diagnostics available for the battery and charging system. Also compare drain in normal use with app activity, signal conditions and a known-compatible charger.
Record the symptom before repair: the charge level at shutdown, the charger used, whether the phone becomes unusually hot and how quickly the percentage changes. If the rear cover or screen is lifting, stop charging and do not press the phone closed. A swollen or damaged lithium-ion battery needs controlled handling.
Confirm which Galaxy S24 you have
| Check | Why it matters |
|---|---|
| Full model name and model code | Separates S24, S24+, S24 Ultra and S24 FE parts and procedures. |
| Battery listing | Must name the exact model; a series-wide description is insufficient. |
| Battery and rear-cover adhesives | Confirm that the required adhesives are supplied or ordered separately. |
| Repair guide revision | Use the latest guide available for the model and region rather than a video for another S24. |
This article does not repeat capacity figures for all four phones because capacity alone cannot establish compatibility. Connector position, dimensions and model-specific part identity decide whether a battery fits.
Choose a repair route before buying parts
A professional repair is the clearer route when the phone is swollen, the frame or cover is damaged, or you lack the equipment in Samsung’s guide. For self-repair, read the complete manual first and calculate the battery, adhesives, tools and risk of additional damage together.
For a quote, ask which battery is included, whether existing damage changes the price, how resealing is handled, what functions are tested and what aftercare applies. A parts price is not equivalent to a fitted repair quote.
What does the replacement process involve?
- Prepare and document the phone. Back up important data, power down as directed and record existing faults.
- Open the device using the model guide. Control heat and tool depth around the rear cover. Do not copy timings or opening positions from another model.
- Disconnect power and remove the battery safely. Follow the connector and adhesive sequence shown by Samsung. If the battery resists removal or is damaged, stop and use the guide’s escalation route.
- Install new adhesives and the replacement battery. Remove old adhesive only from the permitted areas and keep debris away from the cell.
- Reassemble and complete Samsung’s checks. Follow the guide rather than running an open-phone charging test.
The detailed connector locations, screw map and adhesive handling belong in Samsung’s illustrated repair document. This overview helps determine whether the complete job is ready to start.
Test the assembled phone
After reassembly, confirm that the phone starts, charges with known-working equipment and does not show unexpected heat or restarts. Run the relevant Samsung Members diagnostics. Check the rear cover sits evenly, then test wireless charging, cameras, speakers, microphones, buttons and the fingerprint sensor because these systems may be handled or affected during disassembly.
Compare battery life during similar real use over the following days. A brief charging check confirms connection; it cannot prove a full day’s runtime. Record any diagnostic message exactly and return to the installer or supplier with the part number and observations.
Frequently asked questions
Do all Galaxy S24 models use the same battery?
No. Match the battery to the full model name and code, and use that model’s repair guide.
Does new rear-cover adhesive restore the original water-resistance rating?
Do not promise that it does. The quality of the repair, parts and testing affects the seal; treat a repaired device according to the repairer’s stated test and warranty.
