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APP00278 340mAh 3.8V Li-ion replacement battery for Montblanc Summit S2T18 smartwatch, front view on white background showing battery surface and connector cable
APP00278 340mAh 3.8V Li-ion Replacement Battery for Montblanc Summit S2T18 Smartwatch - Image 2

APP00278 340mAh 3.8V Li-ion Replacement Battery for Montblanc Summit S2T18 Smartwatch

Original price was: $15.99.Current price is: $12.99.

🔘 APP00278 340mAh 3.8V | 🔋 Li-ion | 📱 Compatible with Montblanc Summit S2T18 Smartwatch

8 in stock

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SKU: APP00278 Category: Tags: , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

Unlike marketplace sellers with short buyer protection windows, we handle claims directly — no automated disputes, no endless back-and-forth.

Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo recourse, seller can ignore you

🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.

📦 Shipping Cost & Delivery Time (Economy Shipping from China)

📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Ireland, Austria, Belgium, Poland, Denmark, Switzerland, Portugal, Norway, Slovakia, Spain, Hungary, Italy, Czech Republic, Luxembourg, Netherlands, Sweden, Cyprus$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient's CPF, as it is required for Brazilian customs and shipping. Thanks! We appreciate your understanding.

🔋 Can't find your battery model? Use our FREE Battery Lookup Service – tell us your device and we'll find a match within 24 hours. 👉 battery.qingsm.tech/find-my-battery

Description

✅ Condition: Brand New – Never used, factory-tested quality

✅ 340mAh High Capacity – All-day smartwatch battery life

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty from delivery – Longer coverage than major platforms

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Battery model: APP00278
Capacity: 340mAh / 1.29Wh
Rated voltage: 3.8V
Charge limit voltage: 4.2V
Battery type: Li-ion
Compatible with: Montblanc Summit S2T18
Dimensions: 27.20 x 24.30 x 4.50mm
Weight: 6.0g
Package include: 1 x battery
Revitalize your luxury smartwatch with this APP00278 340mAh replacement battery. Compatible exclusively with the Montblanc Summit S2T18, released in October 2018. This high-end timepiece features a 1.2-inch AMOLED display and the Snapdragon Wear 3100 platform. This Li-ion battery delivers the factory-rated 340mAh capacity for daily use, built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Compatibility Note: Fits Montblanc Summit S2T18 (model S2T18). Please confirm your battery model before ordering — APP00278 printed on your existing battery. This battery is specifically designed for the Summit 2 model, not the original Summit or Summit Lite. For reference, third-party retailers sell this battery for approximately $19-$25. Professional installation is recommended as the watch has a sealed design.
Battery Care Tips: Avoid full discharge — recharge when battery drops below 20%. Do not expose to high temperatures. New batteries require 3-5 full charge cycles to reach optimal capacity. If you notice swelling or overheating, stop use immediately.

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Frequently Asked Questions

The APP00278 battery for Montblanc Summit S2T18 is compatible exclusively with the Montblanc Summit S2T18 (model S2T18). This is the replacement battery for Montblanc Summit S2T18 smartwatch. The Montblanc Summit S2T18 was released in October 2018, featuring a 1.2-inch AMOLED display, Snapdragon Wear 3100 platform, and runs Wear OS. This 340mAh battery for Montblanc S2T18 is a direct fit replacement for the original battery. Please verify your watch model in Settings > System > About and check the battery model APP00278 printed on your existing battery before purchasing.

The APP00278 340mAh 3.8V battery has a typical capacity of 340mAh (1.29Wh) and a rated voltage of 3.8V. Charge limit voltage is 4.2V. It is a Li-ion battery built with grade A cells and is CE, RoHS, and UN38.3 certified. The Montblanc Summit S2T18 battery replacement supports the original charging specifications (5V charger via magnetic dock). For best results, use the original charging dock that came with your watch. A full charge typically provides approximately one day of normal usage depending on screen and connectivity settings.

Professional installation is strongly recommended for Montblanc Summit S2T18 battery installation. The watch has a sealed design with a titanium or stainless steel case and strong adhesive. The process to replace battery in Montblanc S2T18 requires opening the caseback with specialized tools, careful handling of the display ribbon cable, and proper resealing to maintain water resistance (IP68 rated for splashes). If you choose DIY phone battery replacement, watch a full teardown tutorial before starting, use proper watch opening tools, and never reuse a battery after removal. Third-party repair shops typically charge $20-40 for labor due to the precision required.

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This battery is in stock and ready to ship within 3-7 days. 90-day warranty included.

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