3.8v lithium battery
What Are 3.8V Lithium Batteries?
3.8V lithium batteries are advanced rechargeable cells that offer a slightly higher nominal voltage than conventional 3.7V lithium-ion batteries. Built with high-voltage lithium cobalt oxide (LiCoO₂) or NMC-based chemistries, these batteries are designed to provide higher energy density, longer runtime, and enhanced performance in compact spaces. Unlike fully customized packs, 3.8V lithium batteries are standardized and pre-engineered for integration, allowing for faster lead times and cost savings. Large Power’s 3.8V cells are widely used in mobile electronics and precision devices that demand high capacity without compromising size or weight.
Product Categories
Large Power offers 3.8V lithium batteries in both pouch cell and cylindrical cell formats, catering to consumer electronics, wearable tech, and compact industrial applications.
Pouch 3.8V Lithium Cells
Our 3.8V lithium pouch cells feature flexible aluminum-laminated casings, making them exceptionally lightweight and thin. These cells offer superior energy-to-volume performance and are often chosen for high-end electronics where every millimeter matters.
Common applications include:
- Smartphones, tablets, and wearables
- Portable medical devices and diagnostic tools
- Smartwatches, GPS trackers, and wireless accessories
Available in a wide range of capacities and sizes, Large Power’s pouch cells can be tailored to fit your device’s exact specifications. Their flat design also simplifies pack assembly and thermal management.
Cylindrical 3.8V Lithium Cells
While less common than 3.7V formats, cylindrical 3.8V lithium cells (e.g., enhanced 18650-type) are available for niche high-performance applications requiring higher cutoff voltages and greater energy density per cell. These are suitable for:
- High-end flashlights and tactical devices
- Professional photography and broadcasting equipment
- Specialized aerospace and defense electronics
With reinforced cell structures and extended cycle stability, Large Power’s cylindrical 3.8V cells meet the demands of premium industrial and B2B applications.
Large Power: Trusted 3.8V Lithium Battery Manufacturer & Wholesaler
Large Power is a globally recognized manufacturer and bulk supplier of 3.8V lithium batteries, with over 20 years of expertise in the lithium battery industry. Our factory produces high-performance 3.8V cells that comply with UL, CE, RoHS, and UN38.3 certifications, making them safe and reliable for global markets.
We support:
- Device OEMs seeking compact, high-voltage power sources
- Battery pack integrators who need consistent and high-density cells
- International wholesalers requiring stable stock and competitive B2B pricing
From small wearables to smart medical solutions, our 3.8V lithium batteries are trusted by leading brands worldwide.
Key Advantages of 3.8V Lithium Batteries
3.8V lithium batteries represent the next generation of high-performance power solutions. Compared to standard 3.7V lithium cells, they offer higher energy output, better form factor flexibility, and enhanced customization options—making them particularly well-suited for modern precision electronics and intelligent applications. Below are the core advantages that set 3.8V lithium batteries apart:
Higher Energy Density for Extended Runtime
By operating at a higher voltage (up to 4.35V when fully charged), 3.8V cells deliver approximately 5%–10% more energy than 3.7V counterparts of the same size—extending battery life for end devices.
Ultra-thin & Flexible Construction for Precision Devices
3.8V lithium batteries, especially in pouch form, are ultra-thin, flexible, and customizable—ideal for TWS earbuds, wearables, and space-constrained electronics.
Mature Materials with Proven Stability
These batteries use high-voltage LiCoO₂ or NCM chemistry, both of which are industry-proven for their stability, safety, and long cycle life. Certified to UL, CE, UN38.3, and more.
Flexible Customization with Smart Battery Options
Customizable in size, capacity, voltage, and protection circuits, with optional I²C or SMBus communication for smart features like status monitoring and remote battery management.
Typical Applications
3.8V lithium batteries are commonly used in flagship smartphones and tablets, offering extended battery life and space-saving integration thanks to their high energy output.
Thanks to their ultra-thin pouch design and lightweight build, 3.8V cells are ideal for TWS earbuds, smartwatches, and fitness trackers, where compact size is critical.
With proven stability and safety, 3.8V batteries power portable medical tools like monitors, digital stethoscopes, and insulin pumps, where long runtime and portability are key.
These high-voltage batteries are also suitable for virtual/augmented reality headsets and micro projectors, which demand high performance and compact battery integration.
Get in Touch with Us
Looking for a professional 3.8V lithium battery manufacturer or wholesaler? Large Power is your one-stop partner for ready-to-ship, high-voltage lithium cells with global delivery and full technical support. Whether you’re developing ultra-thin consumer electronics or cutting-edge medical equipment, we have the right 3.8V battery solution for your needs.
Contact our sales team today to request datasheets, pricing, lead times, or MOQ information for your project.
3.8V Lithium Battery – Frequently Asked Questions
3.8V batteries use high-voltage materials like LiCoO₂ and reach up to 4.35V when fully charged, offering higher energy density and longer runtime compared to 3.7V batteries.
Yes. A CC/CV lithium charger that charges up to 4.35V is required. Using lower-voltage chargers may lead to incomplete charging or safety risks.
Our batteries incorporate mature materials and multi-layered BMS protections. They meet UL, CE, UN38.3, and other certifications to ensure safe performance even at higher voltages.
Absolutely. We offer full OEM/ODM customization including size, voltage, capacity, terminals, and communication protocols to match your exact product needs.
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