351423 3.7V 900mAh LiPo Battery

Tiny Footprint. Serious Power. Built for the Smartest Small Devices.

The 351423 3.7V 900mAh Lithium Polymer Battery redefines what a compact LiPo cell can deliver. Measuring just 3.5mm thin and packed with 900mAh / 3.33Wh of high-density energy — this ultra-slim soft-pack cell is purpose-engineered for smart watches, Bluetooth earphones, wearable devices, and compact IoT terminals where every millimeter and every milligram matters.

✅ Key Features

🔋 900mAh / 3.33Wh – High Capacity in an Ultra-Compact Body Delivers impressive 900mAh capacity from an exceptionally small form factor — providing extended runtime for smart watches, TWS earphone cases, fitness trackers, and IoT devices running GPS, Bluetooth, health sensors, and notification functions simultaneously. More capacity where it counts — without the size penalty.

📐 Ultra-Slim 3.5mm Profile – 351423 (3.5 × 14 × 23mm) Engineered to fit into the tightest device enclosures on the market. The 3.5mm thin, 14×23mm footprint integrates seamlessly into smart watch bodies, earphone charging cases, smart rings, and micro IoT devices — enabling designers to push the boundaries of miniaturization without sacrificing battery life.

🛡️ Built-in PCM 4-in-1 Protection – Safe in Every Scenario High-performance Protection Circuit Module (PCM) provides comprehensive four-layer defense against overcharge, over-discharge, overcurrent, and short circuit — ensuring safe, stable operation in wearables, children’s devices, medical monitors, and IoT terminals. Prevents overheating and swelling risk even within ultra-slim, tightly enclosed device structures.

⚡ Stable 3.7V Output – Precision Power for Sensitive Electronics Advanced polymer electrolyte system maintains a flat, stable discharge curve with minimal voltage deviation throughout the full discharge cycle — ensuring GPS modules, Bluetooth audio chips, health sensors, and micro-displays in smart devices receive consistent, clean power from first use to cutoff. No signal drops. No audio interference. No unexpected shutdowns.

🏋️ Near-Weightless Wearable Experience At just ~7g and 3.5mm thin, the 351423 adds virtually zero perceptible weight or bulk to wrist-worn and body-worn devices — enabling truly comfortable all-day and all-night continuous wear. Whether built into a smartwatch, fitness tracker, or smart eyewear, users simply forget it’s there.

♻️ 500+ Cycle Life – Long-Lasting Wearable Power Rated for over 500 full charge/discharge cycles with ultra-low self-discharge rate. Retains excellent capacity after extended storage — extending the service life of smart watches and wearable devices, reducing end-user replacement costs, and building long-term brand loyalty.

🏆 Grade A Cells – Precision ±10mAh Consistency Every cell undergoes rigorous multi-stage electrochemical testing with capacity variance tightly controlled within ±10mAh — applying the strictest consistency standard specifically for small-capacity wearable cells where uniformity directly impacts device performance. Uniform internal resistance across all production batches ensures predictable, reliable performance at every order scale.

🌍 CE Certified & Globally Compliant CE / UN38.3 / RoHS / MSDS / IEC62133 certified — fully compliant with EU market entry requirements and international air freight regulations. Complete documentation package available for seamless customs clearance across all major global markets.

📦 In Stock – Ready for Immediate Dispatch Strong warehouse inventory available for fast fulfillment. Flexible order quantities from prototype development samples to high-volume production runs — competitive lead times for the fast-moving wearable consumer electronics market.

📦 Specifications

🔌 Compatible Applications

🔍 Ultra-Slim Wearable Battery Series Comparison

✅ The 351423 stands out for delivering the highest capacity-to-size ratio in the ultra-slim category — making it the premier choice for feature-rich smart devices that demand both maximum power and minimum footprint.

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