MEISANE Launches High Voltage 3.85V 392323 240mAh Polymer Lithium Ion Battery for Smart Wearable Devices

Shenzhen, China — July 15, 2026 — Shenzhen Meisha New Energy Technology Co., Ltd. (MEISANE), an ISO9001-2015 certified lithium battery manufacturer established in 2016, today announced its latest high voltage polymer lithium-ion battery: the 3.85V 392323 240mAh cell, purpose-built for smart bracelets, watches and ultra-compact wearable electronics.

As smart wearables shrink in size while demanding longer battery life, conventional 3.7V lithium polymer cells are reaching their energy density limits. MEISANE's new 392323 cell adopts a 3.85V high voltage platform with a 4.4V charge cutoff, delivering approximately 4% higher energy density compared to equivalent-dimension 3.7V cells. This voltage increase extends time between charges, sustains performance under peak loads, and reduces current draw that minimizes thermal stress on adjacent components such as optical heart rate sensors and NFC modules.

Despite compact dimensions of just 4.0mm * 23mm * 25mm and a mass of merely 5.2 grams, the 392323 cell packs an impressive 240mAh rated capacity. This exceptional volumetric efficiency is achieved through advanced electrode coating, precision stacking of high-density cathode materials, and an optimized aluminum-plastic laminate pouch design. For product designers integrating power into smart bracelets, fitness bands, wearable health monitors, and wireless earbud charging cases, the 392323 delivers the highest capacity-to-volume ratio in its class.

Every MEISANE 392323 battery integrates a built-in Protection Circuit Module providing multi-layered safeguards including overcharge, overdischarge, overcurrent, and short-circuit protection. The cell has completed international certifications: UN38.3 transportation safety, IEC62133-2:2017 compliance, CE marking, and RoHS directive. All production batches undergo rigorous screening — capacity grading, internal resistance verification (≤ 90 mΩ), self-discharge testing (<3% per month), and dimensional inspection — ensuring consistent quality for high-volume OEM production.

• Smart Bracelets & Fitness Trackers: Ultra-thin 4.0mm profile integrates seamlessly into wrist-worn health monitors requiring all-day battery life.
• Smart Watches: High voltage platform extends runtime for feature-rich smartwatches with color displays and continuous sensor monitoring.
• Wireless Earbud Charging Cases: Compact form factor fits within pocket-sized TWS charging cases for multiple recharge cycles.
• Miniature Medical Wearables: Consistent discharge and low self-discharge suit continuous glucose monitors and wearable ECG patches.
• IoT Sensor Tags & Beacons: Wide temperature tolerance supports BLE beacons, asset trackers, and environmental sensor nodes.

Established in July 2016 with a registered capital of 5 million RMB, Shenzhen Meisha New Energy Technology Co., Ltd. integrates battery module customization, scheme design, R&D, production and marketing under one roof. Headquartered in Shenzhen with convenient access to the Pearl River Delta manufacturing hub, the company operates under ISO9001-2015 quality standards with advanced production and testing facilities. MEISANE's portfolio spans handheld device batteries, medical equipment batteries, military-grade packs, power lithium batteries, explosion-proof batteries, and BMS energy storage modules. All products meet international testing requirements including UL1642, UL2054, IEC62133, IEEE1725, IEEE1625, UN38.3, and GB/T 31241-2014. With a dedicated engineering team and continuous investment in innovation, MEISANE delivers safe, high-performance energy solutions to customers worldwide.

For product inquiries, pricing, and OEM requests, contact the MEISANE sales team or visit www.newenergy-batteries.com.