402035 3.7V 250mAh LiPo Battery

Product Description — 402035

Silver Pure Cobalt 402035 Solid State Rechargeable Battery | 3.7V 250mAh | GPS Tracker & Wearable Compatible

Overview

The 402035 Silver Series Pure Cobalt Solid State Battery is an ultra-compact, high-reliability rechargeable cell built for demanding portable applications. Featuring an advanced pure cobalt cathode and solid-state polymer construction, this battery delivers a stable 3.7V nominal voltage with a 250mAh capacity — offering 25% more energy than the 402030 in only a marginally larger footprint.

The 402035 is purpose-built for GPS trackers, smartwatches, IoT modules, and any slim device where maximum energy in minimum space is critical. With units available in stock for immediate shipment, it serves equally well as a factory component, OEM build material, or direct replacement battery for compatible devices.

Product Specifications

Key Features

• Pure Cobalt Cathode Chemistry — Superior voltage flatness and energy retention compared to standard NMC or LCO alternatives, ensuring precise, consistent power delivery across the full discharge curve
• Solid State Cell Construction — Solid electrolyte replaces conventional liquid electrolyte, dramatically reducing leakage risk, swelling, and thermal runaway — a critical safety advantage for body-worn and enclosed devices
• Silver Series Premium Grade — Tighter manufacturing tolerances, stricter capacity consistency, and enhanced cycle stability compared to entry-level LiPo alternatives — engineered for performance-critical applications
• Slim 4.0mm Ultra-Thin Profile — Despite the increased 250mAh capacity over the 402030, the 402035 maintains the same 4.0mm thickness, preserving design flexibility for ultra-slim enclosures
• 250mAh Capacity Upgrade — Delivers approximately 25% more runtime compared to the 402030 (200mAh) in the same width and height format, ideal for devices requiring longer battery life without redesigning the housing
• Wide Device Compatibility — Direct drop-in replacement for GPS trackers, smartwatches, and IoT devices using the standard 402035 cell format
• Integrated Protection Circuit (PCM) — Full overcharge, over-discharge, over-current, and short-circuit protection for safe operation under all conditions
• Excellent Low-Temperature Performance — Maintains effective discharge capacity down to -20°C, supporting reliable use in outdoor, cold-climate, and industrial environments
• Low Self-Discharge Rate — Minimal capacity loss during long-term storage, keeping devices ready for use even after extended periods of inactivity
• In-Stock Ready — No production lead time; all standard SKUs are warehoused and available for same-day or next-day dispatch

402030 vs 402035 — Quick Comparison

💡 Both models share identical width and thickness — only the length differs by 5mm. If your device housing allows 35mm length, the 402035 provides 25% more capacity at minimal size and weight trade-off.

Applications

• 📡 GPS trackers & real-time asset tracking devices
• ⌚ Smartwatches & children’s GPS watches
• 🐾 Pet trackers & wildlife monitoring tags
• 🚗 Vehicle & personal tracking units
• 🏥 Medical alert devices & personal emergency locators
• 🌐 IoT sensors, modules & wireless nodes
• 🎧 True wireless earbuds & Bluetooth wearables
• 💳 Smart cards & ultra-thin portable electronics
• 🔦 Compact handheld instruments & remote controls

Compatibility

The 402035 is engineered as a universal compatible replacement for all devices utilizing the 402035 battery format — including GPS trackers, wearables, and OEM electronics requiring a 3.7V lithium polymer cell in the 4.0 × 20 × 35mm form factor.

⚠️ Please confirm your device’s battery cavity dimensions (4.0 × 20 × 35 mm) and operating voltage (3.7V) prior to purchase. Connector type and wire polarity vary by device — custom connector configurations are available on request.

Why Choose This Battery

• 🏭 Factory Direct Supply — Manufactured and warehoused in-house, eliminating intermediaries for sharper pricing and consistent batch quality
• ✅ In Stock & Immediate Dispatch — Standard orders fulfilled same or next business day with no production queue
• 🔬 100% Pre-Shipment QC — Every unit individually tested for capacity output, voltage accuracy, and protection circuit response before packaging
• 🧪 Higher-Grade Cobalt Chemistry — Outperforms standard LiPo in real-world energy density, charge retention, and cycle durability
• 🔧 Full OEM / ODM Customization — Connector type, lead wire length, protective wrapping, capacity adjustment, and brand labeling all available
• 📋 Complete Compliance Documentation — CE, RoHS, UN38.3 Test Report, MSDS, and IEC 62133 available to support global import and safety requirements
• 🌍 Global Shipping Expertise — Experienced in lithium battery export logistics with full hazardous goods handling and documentation

Package Contents

• 1× 402035 Solid State LiPo Battery (3.7V / 250mAh) — Silver Pure Cobalt Series
• Optional: JST-PH 2.0 connector / bare wire leads / custom connector harness

Volume pricing, private labeling, and retail-ready packaging available for bulk and OEM orders. Contact our team for a customized quote.