• Send Us a Message
    • Ir a contenido
    AMPLUS Samsung Galaxy Z Flip4 5G Sub Battery 2630mAh EB-BF723ABY F721B 12-Month Warranty Battery JPC MOBILE ACCESSORIES

    AMPLUS Samsung Galaxy Z Flip4 5G Sub Battery 2630mAh EB-BF723ABY F721B 12-Month Warranty

    $0.00 - $0.00
    $0.00
    $25.80
    $25.80 - $25.80
    $25.80
    SKU AMPBRSub-F721
    AMPLUS Aftermarket Plus · Zero-Cycle · 12-Month Warranty

    AMPLUS Samsung Galaxy Z Flip4 5G Sub Battery — 2630mAh EB-BF723ABY (Aftermarket Plus Grade)

    AMPLUS — Aftermarket Plus — replacement sub battery for Samsung Galaxy Z Flip4 5G. Replaces the larger 2630mAh battery on the lower hinge half. Fits all Z Flip4 regional variants — F721B, F721U, F721N, F721W and F7210. Cross-matches part codes EB-BF723ABY and EB-BF725ABY. Fresh zero-cycle lithium-polymer cells, 3.88V nominal, 10.20Wh rated. Six-layer safety: overcharge, overheat, overload, short-circuit, PTC, thermal cut-off. ROHS and CE certified manufacture. Bench-tested before dispatch from Forest Lake QLD. Backed by full 12-month parts warranty.

    2630mAh · 10.20 Wh · 3.88V Zero-Cycle Li-Polymer 6-Layer Safety BMS ROHS + CE Certified 12-Month Warranty
    Dispatched From Forest Lake QLD Bench Tested Ships 2-4 Days AU-Wide

    Symptoms This Sub Battery Fixes

    Won't Hold A Full Charge

    Phone reads 100% but drops to 50% within an hour.

    Dies Fast Through The Day

    Battery drains from full to flat within four hours.

    Random Restart Or Shutdown

    Phone turns off mid-call or in apps without warning.

    Swollen Battery Bulge

    Cover glass or screen lifting from cell expansion inside.

    Won't Turn On After Update

    One UI 5 or 6 update spikes drain on a weak cell.

    Phone Runs Hot

    Cell overheats during charging or normal video playback.

    Backed By Full 12-Month Parts Warranty

    Vendor-confirmed warranty on every AMPLUS battery. Bench-tested before dispatch.

    Brisbane Technical Hub

    Forest Lake repair workshop. Real Samsung-trained techs on-bench.

    Authenticity Guaranteed

    Genuine AMPLUS product from verified suppliers.

    Reliable Dispatch

    Standard 2-4 business-day shipping AU-wide. Tracking on every order.

    Jump To

    Why AMPLUS Beats Generic Aftermarket Cells

    AMPLUS stands for Aftermarket Plus. Higher tier above generic clones, below Samsung service-pack.

    Full 2630mAh Capacity

    Matches Samsung sub battery spec, not under-rated cells.

    Zero-Cycle Fresh Cells

    Brand-new cells with no charge-discharge history at all.

    6-Layer Safety BMS

    Overcharge, overheat, overload, short-circuit and PTC protection.

    ROHS And CE Certified

    Meets EU restriction-of-hazardous-substances and conformity standards.

    Confirm It Is The Sub Battery Before Swapping

    Z Flip4 has two batteries. Run this check first.

    • Open Settings, then Battery and Device Care, then Battery.
    • Look at the battery percentage drain over a one-hour test.
    • Drain over 30% in an hour points to a weak cell.
    • Use Samsung Members app for built-in battery diagnostic test.
    • Inspect the lower hinge half for any swelling or bulge.
    • Sub battery is the larger 2630mAh cell on the lower half.
    • Main battery is the smaller 903mAh cell on the upper half.
    • Order this AMPLUS sub battery once the lower fault is confirmed.

    Install Notes — Read Before Starting

    High-difficulty repair. Strongly recommend our Forest Lake bench fitting.

    • Power off the Z Flip4 fully before any disassembly.
    • Z Flip4 is glued — gentle heat needed to soften every seal.
    • Remove the back glass on the lower hinge half first.
    • Disconnect the battery flex before touching any other connector.
    • Hinge mechanism is delicate — avoid pulling cables across the pivot.
    • Pull battery adhesive strips slowly and at a low flat angle.
    • Avoid bending or piercing the lithium-polymer cell at all costs.
    • Replace IP-rated cover-glass adhesive after fitting the new battery.
    • Re-test charging plus battery percentage before resealing the case.
    • Run a full charge-discharge cycle to calibrate the BMS chip.

    Tools Needed For The Swap

    Heat Pad Or Hot-Air Station

    Softens the cover-glass adhesive for clean removal.

    Phillips PH00 Driver

    Standard Samsung internal screw size.

    Plastic Spudger + Picks

    Disconnects flex connectors and lifts the cell safely.

    Suction Cup

    Lifts the warmed back glass off the lower hinge half.

    Replacement Cover Adhesive

    Re-seals the back glass for IP rating restoration.

    ESD Wrist Strap + Mat

    Static-safe bench prevents flex damage during work.

    Full Specifications

    Brand

    AMPLUS (Aftermarket Plus)

    Part Type

    Z Flip4 sub (secondary) battery

    Grade

    Aftermarket Plus (zero-cycle)

    Capacity

    2630 mAh nominal

    Voltage

    3.88V nominal

    Energy

    10.20 Wh rated

    Cell Chemistry

    Lithium-ion polymer (cobalt)

    Cycle Status

    Zero cycle (brand-new fresh cells)

    Safety Circuit

    Overcharge, overheat, overload, short-circuit, PTC, thermal cut-off

    Certifications

    ROHS + CE

    Samsung Part Numbers

    EB-BF723ABY · EB-BF725ABY

    Confirmed Fitment

    F721B · F721U · F721N · F721W · F7210

    Compatible Phone

    Samsung Galaxy Z Flip4 5G only (2022)

    Battery Position

    Sub (lower hinge half) — larger cell

    Pairs With

    EB-BF722ABY main battery (903mAh, upper half)

    Combined System Capacity

    3700mAh (sub + main)

    Vendor

    AMPLUS verified supplier

    SKU Code

    AMPBRSub-F721

    Box Contents

    1 × battery only (no adhesive, no tools)

    Warranty

    12-month parts (vendor confirmed)

    Dispatch

    2-4 business days from Forest Lake

    Compatibility — Galaxy Z Flip4 5G Sub Battery Only

    Confirmed Direct Fit (All Z Flip4 Regional Variants)

    Z Flip4 5G F721B (Intl) Z Flip4 5G F721U (US) Z Flip4 5G F721N (Korea) Z Flip4 5G F721W (Canada) Z Flip4 5G F7210 (China) EB-BF723ABY · EB-BF725ABY

    Does NOT Fit These Models Or Slots

    • Z Flip4 MAIN battery slot — needs EB-BF722ABY 903mAh (different part)
    • Galaxy Z Flip3 5G (F711B) — older model, different battery codes
    • Galaxy Z Flip5 (F731B) — newer model, different battery codes
    • Galaxy Z Flip6 (F741B) — newer model, different battery codes
    • Original Galaxy Z Flip (F700F) — first-gen, different layout
    • Galaxy Z Fold series (any generation) — different form factor
    • Any non-Samsung phone or non-foldable Samsung model
    • Any Galaxy S, Note or A-series device

    AMPLUS Aftermarket Plus vs Generic Clone

    Side-by-side. Why Aftermarket Plus tier earns its place over generic clones.

    AMPLUS Aftermarket Plus

    • Full 2630mAh capacity matches Samsung sub-battery spec
    • Zero-cycle fresh cells — never charged before
    • Six-layer safety circuit (overcharge, PTC, thermal)
    • ROHS and CE certified manufacture
    • Cross-matches Samsung codes EB-BF723ABY and EB-BF725ABY
    • Bench-tested before dispatch from Forest Lake
    • Backed by full 12-month parts warranty
    • Honest tier — Aftermarket Plus, not faked OEM

    Generic Aftermarket Clone

    • Capacity often under-rated at 2200mAh or below
    • Used or recycled cells with unknown cycle history
    • Basic two-layer safety with no PTC protection
    • No certification documentation provided
    • May not cross-match either Samsung part code
    • No bench inspection before dispatch
    • Often 30-day or no warranty at all
    • Faked "genuine OEM" labels mislead buyers

    Bench Fitting Available At Our Brisbane Workshop

    Shop 3A, 152 Woogaroo St, Forest Lake QLD 4078

    Brisbane Technical Hub
    Samsung-trained techs handle every Z Flip swap on-bench.
    Authenticity Guaranteed
    Genuine AMPLUS product from verified suppliers.
    Reliable Dispatch
    Tracked delivery Australia-wide.

    Shipping And Payment

    • Dispatch: 2-4 business days from Forest Lake QLD
    • Brisbane Metro: 1-3 business days after dispatch
    • Sydney and Melbourne: 3-5 business days after dispatch
    • Perth and Regional QLD: 5-7 business days after dispatch
    • Tracking number issued on every order
    • Pickup available from Shop 3A, 152 Woogaroo St, Forest Lake QLD 4078

    Pay your way — Afterpay and Klarna available at checkout.

    Buyer FAQs

    +Is this the main battery or the sub battery?

    This is the SUB battery — the 2630mAh cell on the lower hinge half.

    The MAIN battery is a separate 903mAh cell on the upper half.

    For the main battery, you need part EB-BF722ABY instead.

    +What does AMPLUS stand for?

    AMPLUS stands for Aftermarket Plus.

    It is a higher-tier aftermarket grade above generic clones.

    Below Samsung service-pack grade but with full warranty backing.

    +Will it fit my Z Flip4 regional variant?

    Yes. All Z Flip4 5G regional variants share the same battery.

    Fits F721B, F721U, F721N, F721W and F7210 model codes.

    Cross-matches both Samsung part codes EB-BF723ABY and EB-BF725ABY.

    +Will this fit my Z Flip3, Z Flip5 or Z Flip6?

    No. Each Z Flip generation uses different battery part codes.

    Z Flip3 uses EB-BF712 series. Z Flip5 uses EB-BF731 series.

    Z Flip6 uses EB-BF741 series. Order the matching part for your phone.

    +Why does my Z Flip4 have two batteries?

    The folding form factor splits the battery into two cells.

    One sits on each side of the central hinge mechanism.

    Total system capacity is 3700mAh from sub plus main combined.

    +Should I replace both batteries at the same time?

    Both cells age together so dual replacement is recommended.

    A weak old cell paired with a fresh new one drags performance.

    Pair this AMPLUS sub battery with the matching EB-BF722 main.

    +How hard is the Z Flip4 battery swap?

    High difficulty. Z Flip4 is glued and IP-rated.

    Cover glass adhesive needs heat to soften before removal.

    Strongly recommend our Forest Lake bench fitting service.

    +Will the IP water rating still work after swap?

    Only if the cover-glass adhesive is replaced and re-sealed correctly.

    DIY swaps without new adhesive will lose the IPX8 rating.

    Our Forest Lake bench includes new adhesive on every job.

    +Is this safe to ship and store?

    Yes. Shipped at low charge state per IATA lithium rules.

    Six-layer BMS prevents overcharge or thermal events in transit.

    Store at 20°C in a dry place out of direct sunlight.

    +What does the 12-month warranty cover?

    Twelve months on cell defects and BMS circuit failure.

    Punctured, swollen-from-misuse or DIY-damaged cells are not covered.

    Bench inspection before dispatch confirms each cell ships healthy.

    Browse Related Categories

    Quality Seal

    JPC Mobile Promise

    Genuine AMPLUS Aftermarket Plus sub battery. Bench-tested. Backed by 12-month warranty.

    Shop 3A, 152 Woogaroo St, Forest Lake QLD 4078

    Brisbane AU Dispatch Zero-Cycle Cells 12-Month Warranty Bench Tested

    Payment Options

    We offer multiple convenient payment options for your repairs and accessories purchases. Pay with cash, debit/credit card, or interest-free Buy Now Pay Later options.

    Afterpay Zip Klarna PayPal
    Learn more about our Buy Now, Pay Later options →

    Shipping & Processing Information

    Processing Time

    All orders require 2-4 business days for processing, regardless of shipping method.

    This includes order verification, picking, packing and preparation for dispatch.

    You will receive tracking information for all shipped orders and notification when pickup orders are ready for collection.

    Shipping Methods

    Standard: 3-7 business days in transit after processing

    Express: 1-2 business days in transit after processing

    Express shipping only affects delivery time once dispatched, not processing time.

    Express shipping does not expedite the 2-4 business day processing time.

    AMPLUS Samsung Galaxy Z Flip4 5G Sub Battery 2630mAh EB-BF723ABY F721B 12-Month Warranty Battery JPC MOBILE ACCESSORIES

    AMPLUS Samsung Galaxy Z Flip4 5G Sub Battery 2630mAh EB-BF723ABY F721B 12-Month Warranty

    $25.80