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Ticwatch Pro 3.85V Replacement Battery SP452929SF 400mAh

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From $36.99 USD $45.99
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Fits Ticwatch Pro and Pro 4G smartwatches, replacing OEM battery part SP452929SF.
This 3.85V, 400mAh lithium-polymer cell restores full charge cycles on the Pro platform after the original degrades.
Connector is a two-pin pogo contact; alignment matters — watch charger sits on magnetic cradle pins only one way.
We ran multiple full charge cycles on the Pro 4G; BMS accepted the new cell without fault codes or cutoff errors.
After fitting this cell, place the watch on its charger immediately and charge to 100% — 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.

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.

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.

Disclaimer

⚠️ 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

3.85V

Amp

400mAh

Ticwatch Pro / Pro 4G — 3.85V Li-Polymer Replacement Battery (SP452929SF)

This is a 3.85V, 400mAh Li-Polymer cell (SP452929SF) for the Ticwatch Pro and Pro 4G smartwatch. It replaces the original cell when capacity fade causes noticeably shorter battery life between charges. Dimensions are 27.30 × 27.70 × 4.30mm — confirm your existing cell matches before ordering.

  • Pro and Pro 4G compatibility: Both models share the same 3.85V battery bay, connector pinout, and BMS handshake. The SP452929SF part number covers both variants — no hardware modification needed to fit either watch.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the Pro platform and confirmed the BMS accepted the new cell without triggering a protection cutoff. The fuel gauge IC re-calibrated correctly after a full charge from near-zero.
  • Fuel gauge reset after swap: Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on the Pro platform cannot set an accurate reference point without a complete charge cycle from near-zero following a cell replacement.

Why the Ticwatch Pro 4G drains faster with always-on display and continuous HR active

The Pro 4G runs a dual-display stack — an FSTN layer for ambient mode and an AMOLED layer for full colour. When both are active alongside continuous heart rate polling, the combined draw is significantly higher than single-display smartwatches at the same capacity. The HR sensor fires at short intervals to maintain a continuous reading, and each poll adds a measurable current spike. On a 400mAh cell, this combination will shorten the charge interval compared to lighter usage profiles. Switching HR to on-demand rather than continuous is the fastest way to extend time between charges on this platform.

Watch not pairing to phone after battery replacement

Removing the battery terminates the active BLE session without a clean shutdown. The phone retains the old pairing record, but the watch starts fresh with no session state — the two devices no longer share a valid bond key. Simply restarting Bluetooth on the phone will not resolve this. Open the Mobvoi app, remove the existing device entry, then re-pair from scratch through the app's add-device flow to re-establish a clean BLE bond.

Compatible Models

Pro Pro 4G

Replaces Part Numbers

SP452929SF

Technical Specifications

Voltage3.85V
Amp Hours400mAh
Capacity400mAh
Rate1.54Wh
Net Weight7g /0.25 oz
Gross Weight32g /1.13 oz
Approximate Weight32g /1.13 oz
Dimension 27.30 x 27.70 x 4.30mm

Product Highlights

  • Brand: Ticwatch
  • 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 Ticwatch Pro shows 0% and won't boot after I swapped the battery — is the new cell faulty?

The fuel gauge IC lost its voltage reference when the original cell was removed. It has no calibration point for the new cell, so it reports 0% and may refuse to boot. Place the watch directly on its charger without trying to power it on first, and leave it until the charge indicator shows 100%. The gauge will calibrate during that first full charge cycle and the watch will boot normally.

Battery draining completely in a single day — Ticwatch Pro used to last two days on the original cell

On a new cell, the always-on FSTN display, continuous heart rate monitoring, and LTE radio on the 4G model can collectively pull the 400mAh cell down faster than the degraded original felt toward the end of its life — because usage patterns often shift to heavier features over time. Check whether always-on display and continuous HR are both active simultaneously; that combination accounts for the largest share of draw on this platform. Disable continuous HR and set the display to gesture-wake only, then monitor drain over 48 hours to isolate which feature is the primary cause.

Magnetic charger is connected but the Ticwatch Pro isn't taking a charge after fitting the new battery

The most common cause is the charging contacts shifting out of alignment during reassembly. The magnetic puck needs to seat flush against both contact pads on the watch case — even a slight tilt breaks the circuit. Remove the charger, inspect both contact points on the watch for any adhesive residue or debris from the swap, then re-seat the puck until it sits flat and centred. If the charging indicator still does not appear within two minutes, check the contact pads are clean and making full metal-to-metal contact.

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