Ampsentrix Replacement Batteries for Samsung S21 5G, S21 Plus 5G, S21 Ultra 5G

AmpSentrix Replacement Batteries for Samsung Galaxy S21 5G / S21 Plus 5G / S21 Ultra 5G

Restore battery life and dependable everyday performance on a compatible Samsung Galaxy S21 series device with an AmpSentrix replacement battery.

These premium aftermarket lithium-ion batteries are designed for phones that drain quickly, shut down unexpectedly, charge inconsistently, become unusually warm, or no longer provide satisfactory operating time.

Each Samsung Galaxy S21 model uses a specific battery design. Select the exact device model before ordering, as these batteries are not interchangeable.

Compatible Models

Samsung Galaxy S21 5G

Compatible with models within the SM-G991 series, including applicable regional variants.

Samsung Galaxy S21 Plus 5G

Compatible with models within the SM-G996 series, including applicable regional variants.

Samsung Galaxy S21 Ultra 5G

Compatible with models within the SM-G998 series, including applicable regional variants.

Please confirm the exact model number under Settings > About Phone or on the original device label before ordering.

This listing is not compatible with the Galaxy S21 FE 5G, later Galaxy S-series models, or other Samsung devices unless specifically stated.

Available Options

• AmpSentrix replacement battery for Samsung Galaxy S21 5G
• AmpSentrix replacement battery for Samsung Galaxy S21 Plus 5G
• AmpSentrix replacement battery for Samsung Galaxy S21 Ultra 5G

The batteries may appear similar but use different dimensions, capacities, connectors, flex-cable layouts, and internal positioning.

Key Features

• Premium AmpSentrix replacement battery
• Rechargeable lithium-ion construction
• Zero-cycle battery
• Model-specific dimensions and connector layout
• Helps restore usable battery life and operating time
• Suitable for aged, weak, swollen, or non-functional batteries
• Battery adhesive included where supplied
• Designed as a replacement for the original internal battery
• Professional installation strongly recommended

Common Battery-Failure Symptoms

Battery replacement may be appropriate when the phone:

• Drains significantly faster than expected
• Shuts down before reaching 0%
• Restarts unexpectedly
• Charges slowly or inconsistently
• Does not remain powered without a charger
• Displays an inaccurate battery percentage
• Becomes unusually warm during ordinary use
• Has a swollen battery lifting the rear cover or display
• No longer powers on because the battery cannot accept a charge

These symptoms may also result from charging-port damage, charging-controller failure, logic-board faults, liquid ingress, software problems, defective charging accessories, poor cellular signal, or excessive background activity.

Proper diagnosis is recommended before replacing the battery.

Product Quality Notes

This is a premium aftermarket replacement battery and is not manufactured by Samsung.

Actual battery performance depends on:

• The phone’s age and overall condition
• Screen brightness and refresh-rate settings
• Installed applications
• Background activity
• Cellular signal strength
• 5G network usage
• Operating temperature
• Charging habits
• Wireless charging usage
• Condition of the charging port and internal circuitry

A replacement battery will not correct excessive power consumption caused by a logic-board fault, charging-circuit problem, liquid damage, defective display, software malfunction, or another damaged internal component.

Several charging cycles may be required before the displayed battery percentage becomes fully consistent after installation.

Installation Notes

Professional installation is strongly recommended.

Battery replacement requires removal of the bonded rear cover. Improper removal may damage the rear cover, wireless charging assembly, battery, camera components, flex cables, or nearby internal parts.

Before final installation:

• Confirm the exact Samsung model number
• Inspect the replacement battery for swelling, punctures, tears, or other damage
• Disconnect the original battery before connecting the replacement
• Test charging and battery recognition
• Confirm the battery lies flat inside the housing
• Ensure no cables or components are trapped beneath the battery
• Test wired and wireless charging where applicable
• Test the device before resealing the rear cover

Never bend, puncture, crush, overheat, or install a damaged lithium-ion battery. Improper handling may cause fire, smoke, chemical leakage, swelling, or serious device damage.

No tools or rear-cover adhesive are included. Battery adhesive may be included where supplied, but replacement rear-cover sealing materials are not included unless specifically stated.

Shipping Restrictions

Due to lithium-ion battery transportation restrictions:

• This product cannot be shipped to the United States.
• Shipping is available only within Canada.
• This product is eligible for ground shipping only.
• Air and international shipping options are not available.

Orders containing batteries may require additional delivery time compared with products eligible for air transportation.

Warranty

This component includes a 30-day limited parts-only warranty against manufacturing defects, subject to the applicable 3C-Easy Markham Component Warranty.

The warranty does not cover:

• Normal battery-capacity degradation
• Swelling caused by excessive heat, misuse, overcharging, or device faults
• Bent, punctured, torn, crushed, or physically damaged batteries
• Damaged battery connectors or flex cables
• Improper installation
• Liquid or corrosion damage
• Damage caused by incompatible chargers or accessories
• Charging or power issues caused by unrelated components
• Labour, diagnostics, installation, removal, or related repair costs

The battery must be inspected and tested before final installation.

Important Notes

• Battery only; phone and installation tools are not included.
• Select the correct option for the Galaxy S21 5G, S21 Plus 5G, or S21 Ultra 5G.
• These batteries are not interchangeable.
• Battery adhesive may be included where supplied.
• Rear-cover adhesive and sealing materials are not included.
• Water and dust resistance cannot be guaranteed after the device has been opened or repaired.
• Never install a swollen, bent, punctured, leaking, or otherwise damaged battery.
• Dispose of the original battery through an approved battery-recycling facility.
• Professional installation is strongly recommended.
• Cannot be shipped to the USA. Ground shipping within Canada only.
• Product appearance, markings, connector design, and packaging may vary between production batches.

AmpSentrix and related trademarks belong to their respective owners. Samsung, Galaxy, and related trademarks are the property of Samsung Electronics and are used only to identify compatibility. 3C-Easy Markham is not affiliated with or endorsed by Samsung Electronics.