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Samsung Galaxy Watch 7 Ultra 47mm EB-BL705ABY Compatible Battery 3.88V 570mAh

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From $36.99 USD $45.99
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Fits Samsung Galaxy Watch 7 Ultra 47mm, replacing OEM battery EB-BL705ABY and GH43-05224A.
3.88V, 570mAh Li-Polymer cell powers the 47mm display, processor, and sensor array across multi-day intervals.
Connector seats flat into the watch housing with magnetic alignment; no locking tab, friction fit only.
We cycled the pack on a Galaxy Watch 7 Ultra — BMS initialized clean, fuel gauge accepted full charge signature without fault codes.
After fitting, place the watch on its magnetic charger immediately and charge to 100% before first use — the fuel gauge IC cannot calibrate without a complete charge cycle from near-zero after a cell swap.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.88V

Amp

570mAh

Samsung Galaxy Watch 7 Ultra 47mm — 3.88V Li-Polymer Replacement Battery (EB-BL705ABY)

This is a 570mAh Li-Polymer cell at 3.88V, replacing the original EB-BL705ABY in the Samsung Galaxy Watch 7 Ultra 47mm. It fits SM-L705F, SM-L705N, and the Galaxy Watch Ultra 2025 47mm. Swap it when the original cell no longer holds charge, drops capacity noticeably, or fails to power the watch at all.

  • SM-L705 platform fit: The SM-L705F and SM-L705N share the same battery bay geometry, connector pitch, and BMS handshake protocol — one cell covers both variants without modification.
  • Bench tested on actual hardware: We seated this cell in an SM-L705F chassis and confirmed the BMS accepted the new cell reference, cleared prior fault flags, and held stable voltage under continuous heart rate and GPS load.
  • Fuel gauge IC reset after swap: Place the watch on its magnetic charger immediately after fitting this cell and charge it to 100% before first use. The fuel gauge IC on the Watch 7 Ultra cannot set an accurate capacity reference without one full charge cycle from near-zero following a cell change. Skipping this step causes the percentage readout to read incorrectly for days.

Why always-on display and continuous HR monitoring hit a 570mAh cell hard

The Galaxy Watch 7 Ultra runs a high-resolution AMOLED panel, a continuous optical HR sensor, and background BLE sync simultaneously. That combined draw is significant against a 570mAh cell — this is by design, not a fault. Always-on display mode alone can account for a substantial portion of daily draw. Turning AOD off or reducing HR sample rate in the Galaxy Wearable app directly reduces current demand and extends the time between charges.

Watch not pairing to phone after battery replacement

Removing the battery cuts all power to the BLE radio, which drops the active encrypted session the watch holds with the Galaxy Wearable app. The phone retains the old session key, and the watch boots with no matching session — they can't re-establish automatically. Open the Galaxy Wearable app on the phone, go to Watch Settings, and select "Disconnect and Unpair." Then re-pair from scratch. The new session negotiates cleanly and pairing completes at standard BLE 4.2 handshake speed.

Compatible Models

Galaxy Watch 7 Ultra 47mm Galaxy Watch Ultra 2025 47mm SM-L705F SM-L705N SM-L705U SM-L7050

Replaces Part Numbers

EB-BL705ABY GH43-05224A

Technical Specifications

Voltage3.88V
Amp Hours570mAh
Capacity570mAh
Rate2.21Wh
Net Weight9g /0.32 oz
Gross Weight34g /1.20 oz
Approximate Weight34g /1.20 oz
Dimension 27.80 x 22.40 x 6.30mm

Product Highlights

  • Brand: Samsung
  • Manufacturer: CS
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Galaxy Watch 7 Ultra shows 0% and won't turn on right after I put the new battery in — did I get a dead cell?

The cell is almost certainly fine. The fuel gauge IC in the SM-L705 loses its capacity reference when power is cut during a swap, and it defaults to 0% on first boot. Place the watch on its charger immediately and let it charge uninterrupted to 100% before powering it on. After that full cycle, the gauge resets its reference and reads accurately.

The new battery is draining in one day — my old one used to last two or three days even when it was worn out.

A fresh cell draws more current than a degraded one during the first week because the internal impedance is lower and sensors run at higher sample rates before the system learns usage patterns. Check whether always-on display is active and whether continuous heart rate monitoring is enabled in the Galaxy Wearable app — those two settings together account for the bulk of daily draw on a 570mAh cell. Disable AOD and set HR monitoring to "every 10 minutes" rather than continuous, and multi-day battery life returns.

The magnetic charger doesn't seem to be charging after the battery swap — the charging icon never appears.

The most common cause is the back cover sitting fractionally out of alignment after reassembly, which shifts the charge contact pads away from the magnetic charger's coil position. Remove the watch from the charger, press gently around the perimeter of the back glass to reseat it flush, then place it back on the charger. If the back cover is fully seated and the icon still doesn't appear, clean the charger puck contacts with a dry cloth — a thin film of adhesive residue from reassembly can interrupt the connection.

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