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Louis Vuitton Tambour Horizon 2 Compatible Battery 3.8V 300mAh

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From $38.99 USD $47.99
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Fits Louis Vuitton Tambour Horizon 2 smartwatch, replaces OEM part APP00282.
3.8V, 300mAh lithium-polymer cell restores multi-day runtime to this connected watch.
Connector sits flush in the battery slot with no locking tab required.
We bench-tested the cell in the Tambour Horizon 2 platform; BMS initialized cleanly and held voltage stable across standby and active sensor cycles.
After installing this cell, place the watch on its magnetic charger immediately and charge to 100% before wearing — the fuel gauge IC cannot calibrate runtime 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.

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🔹 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

3.8V

Amp

300mAh

Louis Vuitton Tambour Horizon 2 — 3.8V Li-Polymer Replacement Battery (APP00282)

This is a 3.8V, 300mAh lithium-polymer cell for the Louis Vuitton Tambour Horizon 2 smartwatch. It replaces OEM part APP00282 and restores power to the watch's timekeeping, notifications, fitness tracking, and connectivity functions. The cell measures 24.50 x 23.30 x 4.50mm and matches the original form factor.

  • Tambour Horizon 2 fitment: The Horizon 2 uses a compact pouch-style cell on a 3.8V rail with a multi-pin connector that passes BMS data to the watch's fuel gauge IC. This replacement matches that connector pinout and cell geometry so the BMS handshake completes on first boot.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Horizon 2 platform. The BMS accepted the cell without fault codes, and the fuel gauge registered state-of-charge correctly after a full calibration cycle.
  • Fuel gauge calibration after swap: Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The Horizon 2's fuel gauge IC loses its reference point when the cell is removed and cannot recalibrate without a full charge from near-zero — skipping this step causes persistent 0% or wildly inaccurate battery readings.

Why the Tambour Horizon 2 burns through a new cell in one day

The Horizon 2 runs Wear OS with an always-on display option and continuous heart rate monitoring. Together those two features can draw enough current to deplete a 300mAh cell well inside 24 hours. A new cell on a fresh impedance profile also appears to drain faster in the first few charge cycles while the fuel gauge recalibrates its internal model. If daily drain is still excessive after three full cycles, check that always-on display is off and that heart rate is set to periodic rather than continuous in the Wear OS settings.

Watch not pairing to phone after battery replacement

Removing the battery terminates any active Bluetooth Low Energy session and clears the watch's active connection state. The companion app on your phone holds the old session ID, which no longer matches the watch after a full power removal. Open the Louis Vuitton companion app or your phone's Bluetooth settings, forget the watch, then initiate a fresh pair from the watch's own Bluetooth menu. The watch must show its six-digit pairing code on screen — if it does not appear, restart the watch first by holding the crown for ten seconds.

Compatible Models

Tambour Horizon 2

Replaces Part Numbers

APP00282

Technical Specifications

Voltage3.8V
Amp Hours300mAh
Capacity300mAh
Rate1.14Wh
Net Weight5g /0.18 oz
Gross Weight30g /1.06 oz
Approximate Weight30g /1.06 oz
Dimension 24.50 x 23.30 x 4.50mm

Product Highlights

  • Brand: Louis Vuitton
  • 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 Tambour Horizon 2 shows 0% and won't hold a charge reading after I fitted the new battery — what went wrong?

The fuel gauge IC on the Horizon 2 loses its voltage reference the moment the cell is disconnected. Without a fresh calibration point, it defaults to 0% or reads erratically. Place the watch on its charger immediately after the swap and let it charge uninterrupted to 100% before powering it on. One full charge cycle from near-zero resets the gauge — after that, readings stabilise.

The charge contacts on my magnetic charger aren't connecting properly since I replaced the battery — the watch just sits on the charger and nothing happens.

Reassembly can shift the back plate by a fraction of a millimetre, which is enough to misalign the magnetic charge contacts. Remove the watch from the charger, wipe both the contact points on the watch and the charger with a dry cloth, then re-seat the watch directly centred on the charger puck. If the charging indicator still does not appear within 30 seconds, gently press the back of the case to check whether the rear cover seated flush — an uneven press-fit during reassembly is the most common cause.

My heart rate sensor seems to be running the new battery down faster than I expected in the first few days — is something wrong with the cell?

This is normal behaviour in the first week after a cell swap. The heart rate sensor draws current against a new cell impedance profile, and the fuel gauge IC adjusts its internal discharge model over several cycles — early readings overestimate drain. Set heart rate monitoring to periodic rather than continuous in Wear OS health settings, and check whether a background app has woken the sensor. If drain is still abnormal after five full charge cycles, measure resting voltage off the charger after two hours — it should sit above 3.75V.

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