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Samsung Watch 5 Pro EB-BR925ABY Replacement Battery 3.88V 570mAh

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From $28.99 USD $35.99
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Fits Samsung Galaxy Watch 5 Pro models SM-R920 and SM-R925, replacing OEM part EB-BR925ABY.
3.88V, 570mAh lithium-polymer cell delivers the same energy capacity as the original for full-day operation.
Connector is a two-pin pogo contact pad; orientation matters — align flat edge to watch housing slot.
We tested the BMS on a standard Samsung watch charger platform; fuel gauge registered correctly after full charge cycle.
Place the watch on its magnetic charger immediately after cell installation and charge to 100% before first use — the fuel gauge IC cannot calibrate without a full charge cycle from near-zero after a swap.
Delivery time

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

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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

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

Voltage

3.88V

Amp

570mAh

Samsung Galaxy Watch 5 Pro 45mm — 3.88V Li-Polymer Replacement Battery (EB-BR925ABY)

This 3.88V, 570mAh Li-Polymer cell is a direct replacement for the original battery in the Samsung Galaxy Watch 5 Pro 45mm (SM-R920, SM-R925). It powers the display, heart rate and sleep sensors, GPS, and Bluetooth connectivity. Fit it when the original cell no longer holds charge through a standard day of use.

  • SM-R920 and SM-R925 compatibility: Both variants of the Watch 5 Pro share the same 27.80 × 25.00 × 6.80mm cell pocket, the same flex connector, and the same BMS handshake protocol. One replacement SKU covers both.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SM-R925 platform. The BMS accepted the new cell without a firmware flag, and the fuel gauge registered charge state correctly after a full charge cycle post-swap.
  • Fuel gauge reset after swap: After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on Wear OS platforms loses its voltage reference when the cell is disconnected. Without a full charge cycle from near-zero, the percentage readout will be inaccurate and the watch may shut off unexpectedly at reported non-zero charge levels.

Why the Watch 5 Pro battery percentage jumps or drops sharply after a cell swap

The Watch 5 Pro uses a coulomb-counting fuel gauge that builds its state-of-charge model over charge and discharge cycles. When the old cell is removed, that learned model is erased. The IC starts recalculating from scratch using the new cell's impedance, which differs from the aged original. Until two or three full charge cycles complete, the reported percentage can jump by 10–20% or drop suddenly without warning. This settles after the gauge recalibrates.

Watch 5 Pro not pairing with phone after battery replacement

Removing power during a cell swap terminates the active BLE session between the watch and the paired phone. The Galaxy Wearable app holds the last session key, but the watch generates a new one on cold boot after a full power loss. Open the Galaxy Wearable app on the phone, select the watch, choose "Unpair," then re-initiate pairing from the watch's Bluetooth settings. The process takes under two minutes and restores all notification and health data sync.

Compatible Models

Watch 5 Pro Galaxy Watch 5 Pro 45mm SM-R920 SM-R925

Replaces Part Numbers

EB-BR925ABY GH43-05116A

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 25.00 x 6.80mm

Product Highlights

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

Frequently Asked Questions

My Watch 5 Pro 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 loses its charge reference entirely when power is cut during a swap, so it reports 0% until it sees a full charge cycle. Place the watch on its magnetic charger immediately after reassembly and leave it until the display confirms 100%. The watch should power on normally within a few minutes of charging starting.

The new battery is draining completely in one day — my old one used to last two or three days even when it was degraded. What's wrong?

Check whether Always-On Display and continuous heart rate monitoring are both active. On the Watch 5 Pro, those two features together account for the majority of daily draw, and a new cell at full 570mAh capacity will still deplete in under 24 hours with both running. Go to Settings → Battery → Power Mode and switch continuous HR to "Every 10 minutes" — that alone cuts sensor draw significantly and restores multi-day operation.

The Watch 5 Pro sits on the charger but the charging icon never appears after I replaced the battery — is the charger broken?

The magnetic charger puck requires precise alignment with the contact pads on the watch case back. If the case back shifted even slightly during reassembly, the pads miss the magnets by enough to break the circuit. Remove the watch from the charger, confirm the case back is fully flush and seated, then recentre it on the puck — you should feel a light magnetic pull when alignment is correct. If the icon still does not appear, check that the flex connector inside was fully re-seated before closing the case.

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