Ultra-Compact Design 3.7V 155mAh Li-Polymer Battery for Medical Wearable Devices

The LP-402025-1S-3 is a premium ultra-compact lithium polymer battery, featuring a nominal 3.7V voltage (4.2V full charge), 155mAh capacity, and 0.57Wh energy output. Engineered with advanced li-polymer chemistry, a slim 4.3*20.5*26 (mm) prismatic form factor, and a stable single-cell configuration, it merges space-saving flexibility, reliable performance, and lightweight design—making it the ideal power source for micro wearables, mini IoT sensors, and ultra-small consumer electronics that demand minimal footprint without compromising runtime.

Crafted to solve the pain points of rigid batteries and low-capacity alternatives for tiny devices:

• 155mAh Targeted Runtime for Micro Gadgets: Delivers 0.57Wh of stable energy, powering ultra-small devices for extended periods: supporting mini Bluetooth earbuds for 4–6 hours of continuous playback, micro IoT temperature sensors for 2–3 weeks (low-power mode), or tiny fitness trackers for 3–5 days of basic use. Perfect for scenarios where device size is a top priority.
• 402025 Ultra-Slim Flexibility & 1S Stability: The 4.3*20.5*26 (mm) profile is thinner than a credit card, fitting seamlessly into the tightest device enclosures. Unlike rigid cylindrical batteries, its flexible pouch design adapts to irregular shapes, preserving the sleek aesthetics of micro wearables and sensors. Weighing only 3–4g, it adds negligible bulk to portable gadgets.

• Micro Wearables: True wireless earbuds, mini fitness trackers, and tiny smart tags.
• IoT & Smart Home Devices: Micro Bluetooth beacons, environmental sensors (temperature/humidity), and mini smart doorbell accessories.
• Mini Consumer Electronics: Keychain voice recorders, tiny LED lights, and micro portable media players.
• DIY Projects: Arduino-based micro gadgets, small drone components, and custom wearable electronics.

Shenzhen BAKTH Technology Co., Ltd. was established in 2002. For 21 years, we've specialized in battery pack assembly and PCM/BMS design and production. Our 5,000-square-meter factory features automated production lines and SMT assembly capabilities.

ISO9001, ISO14001, UL, BIS, KC, USTC, CE, CB - our battery packs have reliable quality assurance.

No limitation - we offer competitive pricing based on order quantity. Sample orders are welcome to test our quality before bulk orders.

Standard warranty is 12 months (negotiable for special products). Our complete production process ensures quality before shipment.

Standard products: 3-4 weeks for samples (depending on cell availability), 5-8 weeks for bulk orders (varies by model and quantity).

Yes - our professional R&D team can provide customized solutions according to your requirements.