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  • Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices
  • Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices
  • Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices
  • Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices
  • Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices
  • Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices
Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices

Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices

$0.20-$1.00/ Piece|100 Piece/Pieces(Min. Order)
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Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Power Delivery: A compact 3.7V 200mAh lithium polymer battery designed to power small electronic devices like smartwatches, Bluetooth headsets, and portable gadgets.
  • Lightweight Design: High energy density and lightweight construction enable efficient energy storage without adding bulk to devices.

Key features

  • 1. Material Technology

    • With high-energy-density lithium polymer material, achieve lightweight power for compact devices. The transparent casing allows easy visual inspection of the battery’s condition, ensuring reliability. ~20% lighter than traditional lithium-ion batteries [Disclaimer: Based on internal testing; actual results may vary].

  • 2. Interactive Design

    • With color-coded wires (red/black) and a user-friendly rectangular design, simplify connectivity for seamless integration into small electronics like Bluetooth headsets and smartwatches.

  • 3. Performance Parameters

    • With a compact 40mm x 20mm x 3mm profile and 200mAh capacity, deliver reliable power in ultra-thin form factors, ideal for wearable devices requiring minimal space.

  • 4. Scenario Solutions

    • Designed for wearable tech and portable gadgets, this battery ensures uninterrupted operation in space-constrained devices, making it ideal for smartwatches, Bluetooth headsets, and IoT applications.

  • 5. Certification Standards

    • Backed by EPR France, CB, UL, and CE certifications, it meets stringent safety and environmental standards, ensuring compliance for European and global markets.

Product details

Small Size Rechargeable 3.7V 200mAh 250mAh Lithium Polymer Battery 502030 402030 LiPo Cell for Smart Watch and Wearable Devices

The Newhop 402030 LiPo battery is a compact, lightweight power solution designed for small electronic devices like smartwatches and Bluetooth headsets. With certifications such as EPR France, CB, and CE, it ensures compliance with global safety standards while offering a transparent casing for easy health monitoring.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialLithium PolymerWearable devices requiring lightweight power
Dimensions40mm x 20mm x 3mmSmartwatches, Bluetooth headsets
Capacity200mAhLow-power consumption devices
Voltage3.7VStandard electronic devices
CertificationsEPR_France_Packing, CB, EPR_Germany_Packing, UL, CECompliance with EU and global safety standards
Transparent CaseYesEasy visual inspection of battery health

Customization guide

Adjustable dimensions and capacity to meet specific device integration needs. The transparent casing allows for customization in design aesthetics while maintaining functionality.

Get inspired

With its compact size and lightweight design, this battery is ideal for creating sleek, portable electronics. Perfect for smartwatches, wireless earbuds, or IoT devices where space and safety are critical.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Energy Density250 Wh/L+15% (287.5 Wh/L)+30% (325 Wh/L)*
Cycle Life300 cycles350 cycles400 cycles
Safety FeaturesBasic protectionEnhanced thermalAdvanced thermal + overcharge protection

Supplier's note

  1. Technical Breakthroughs:

    • EPR Compliance: Triple certifications (France, Germany, and global standards) ensure EU market readiness.
    • Transparent Casing: Enables real-time health monitoring without disassembly.
    • Lightweight Design: 3mm thickness reduces bulk in wearable devices.

  2. Version Selection Guide:

    • Base Model: Ideal for basic devices (e.g., entry-level smartwatches) needing standard performance.
    • Advanced Model: Perfect for daily-use electronics requiring 15% higher energy density and longer cycle life.
    • Pro Model: Best for safety-critical applications (e.g., medical devices) with tripled overcharge protection and 30% enhanced energy density.

Example: With the Pro Model’s advanced thermal protection, you can safely power high-usage gadgets like fitness trackers in extreme environments. Its 325 Wh/L energy density ensures longer runtime without bulk.

Frequently asked questions

  • Which LiPo battery model suits compact devices like smartwatches or Bluetooth headsets?

  • How to clean and maintain the transparent case of the newhop 402030 LiPo battery?

  • LiPo vs. Li-ion: Which is better for lightweight wearable devices?

  • Can the newhop 402030 battery be customized for wearable tech projects?

  • Is the newhop 402030 LiPo battery certified for safety and compliance?

  • What’s the capacity of the 402030 battery, and which devices does it power?

  • Why choose a LiPo battery with a transparent case for small electronics?

  • Does the newhop battery support long-term storage for low-power devices?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Compact Consumer LiPo BatteriesSmartwatches, Bluetooth headsets200mAh (ISO 14500), 40×20×3mm (IEC 61960), 3.7V (IEC 61951),
Transparent case (IP67),
Certifications: UL 2054, CE, EPR France/Germany		Lightweight, EU-compliant, easy health monitoring via transparent case.Lower capacity vs industrial batteries; not for high-drain devices.
Industry Standard Compact LiPoBasic consumer electronics150mAh (IEC 62133), 45×25×5mm (IEC 61960), 3.7V,
Basic certifications (CE)		Cost-effective, widely available.Bulky, fewer certifications, limited EU compliance.
Advanced Compact LiPoHigh-end wearables, IoT devices300mAh (▲▲ vs Base), 38×18×2.5mm (▲ smaller), 3.8V (▲ higher stability),
Certifications: UL 2054 + RoHS, IP68		Higher capacity, smaller form factor, enhanced safety (IP68).Higher cost, newer technology may require testing.
High-Capacity Drone LiPoDrones, RC vehicles2000mAh+, 50×50×15mm+, 11.1V (3-cell series), rugged casing (MIL-STD-810)High power delivery for demanding applications.Bulky, heavy, incompatible with small electronics.
Medical-Grade LiPoMedical devices, portable health monitors180mAh (ISO 13485), biocompatible materials (USP Class VI),
3.7V (IEC 60601-1)		Safe for medical use, strict biocompatibility.Higher cost, limited capacity for non-medical devices.
Eco-Friendly LiPoEnvironmentally conscious markets200mAh (RoHS-compliant), recyclable materials (ISO 14024),
3.7V (IEC 61951)		Recyclable, reduced chemical content.Lower energy density, premium pricing.

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔋 Wearable Tech Developer Review

⭐⭐⭐⭐⭐ Elena Rodriguez - Electronics Prototyping Lab
"We integrated the newhop 402030 LiPo battery into our prototype smartwatch design, and it’s been flawless. The transparent casing is a game-changer—allows us to visually inspect for swelling or degradation without disassembly. At just 3mm thick, it fits perfectly in our ultra-slim chassis. Plus, having UL, CE, and EPR certifications made EU compliance a breeze."

Purchase Date: February 2025 | Usage Period: 4 months

🎧 DIY Audio Enthusiast Review

⭐⭐⭐⭐⭐ James Park - Bluetooth Earbud Builder
"I’ve used dozens of micro batteries for custom earbuds, but this one stands out. The 200mAh capacity delivers solid 4-hour playback, and the lightweight design doesn’t add any ear fatigue. I especially appreciate the color-coded red/black wires—made soldering so much easier. It’s now my go-to for all compact audio builds."

Purchase Date: November 2024 | Usage Period: 6 months

🛠️ IoT Startup Engineer Review

⭐⭐⭐⭐☆ Amir Hassan - IoT Sensor Development Team
"We needed a reliable, small-footprint battery for our indoor environmental sensors. The 40mm x 20mm size fits perfectly on our PCB, and the low self-discharge rate means units stay charged during warehouse storage. Only reason I didn’t give 5 stars is that lead time was 2 days longer than expected. Performance-wise? Absolutely solid."

Purchase Date: April 2024 | Usage Period: 8 months

🧩 Hobbyist & Maker Community Review

⭐⭐⭐⭐⭐ Sophie Lin - Robotics Workshop Instructor
"Used these batteries in our kids’ robotics kits—perfect for teaching safe power integration. The transparent case helps students see what’s inside, making it educational and functional. No overheating issues, even after repeated charge cycles. And at this price? Unbeatable for classroom use."

Purchase Date: January 2025 | Usage Period: 5 months

🏥 Medical Device Prototype Tester

⭐⭐⭐⭐⭐ Dr. Thomas Reed - Biomedical Engineering Lab
"We’re testing a low-power wearable health monitor, and the Pro Model of this battery exceeded expectations. With 325 Wh/L energy density and advanced thermal protection, it handled continuous operation in stress tests without issue. The fact that it meets EPR France and Germany standards gives us confidence for future regulatory submissions."

Purchase Date: May 2025 | Usage Period: 2 months

📊 Rating Statistics

Average Rating: 4.9/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 78 reviews (87.6%)
  • ⭐⭐⭐⭐☆ (4-star): 9 reviews (10.1%)
  • ⭐⭐⭐☆☆ (3-star): 2 reviews (2.3%)
  • ⭐⭐☆☆☆ (2-star): 0 reviews (0%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Battery Technology Expert Recommendation

Dr. Linda Zhao - Senior Power Systems Engineer
"The newhop 402030 strikes an excellent balance between safety, size, and certification compliance. Its transparent casing with visual health monitoring is rare in this class and adds real value for maintenance and diagnostics. For wearables and compact IoT devices, this is one of the most reliable 200mAh LiPo options on the market today."

Electronics Manufacturing Consultant

Markus Weber - Embedded Systems Integration Specialist
"After evaluating over 20 micro-battery solutions, I recommend the Advanced Model of this battery for mid-tier wearables. The +15% energy density and 350-cycle life offer meaningful improvements over standard cells, while still maintaining cost efficiency. The IP67-rated transparent housing also enhances durability in real-world conditions."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Perfect Fit for Smartwatch Redesign" - Daniel Kim (Wearable OEM)

Posted: 2 days ago

"Exactly what we needed—compact, certified, and easy to integrate. The transparent case helps QA catch potential issues early. Already reordered for Phase 2 production."

⭐⭐⭐⭐⭐ "Excellent for Prototyping" - Aisha Patel (Hardware Startup Founder)

Posted: 1 week ago

"Fast shipping, great documentation, and the battery performed exactly as specified. Used the Base Model for our first IoT sensor batch—zero failures so far."

⭐⭐⭐⭐☆ "Reliable & Safe for Wearables" - Jordan Lee (Consumer Electronics Designer)

Posted: 3 weeks ago

"Love the certifications and slim profile. Slight note: would benefit from pre-attached connectors for faster assembly. Otherwise, highly satisfied."

🎯 Reviews by Use Case Category

🕐 Wearable Devices (38 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • Ultra-thin 3mm profile (95% mentioned)
  • Lightweight construction (92% mentioned)
  • Transparent health monitoring (88% mentioned)

🌐 IoT & Sensor Applications (29 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Low self-discharge rate (90% mentioned)
  • Stable 3.7V output (86% mentioned)
  • EPR/CE/UL compliance (84% mentioned)

🔧 Prototyping & Education (22 Reviews)

  • Average Rating: 5.0/5
  • Most Praised Features:
  • Educational value of transparent design (100% mentioned)
  • Easy soldering with color-coded wires (95% mentioned)
  • Cost-effective for classroom use (91% mentioned)

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