3.8V Lithium Battery Cells & Packs | High-Efficiency Power Solutions by KRL

Engineered for higher voltage, longer cycle life, and compact system design — KRL 3.8V lithium batteries deliver optimized performance for demanding industrial and smart device applications.

What is a 3.8V Lithium Battery?

A 3.8V lithium battery is an advanced lithium-ion cell designed with a higher nominal voltage compared to conventional 3.7V batteries. Built using upgraded cathode materials and precision manufacturing processes, these batteries offer greater energy density, improved discharge efficiency, and extended service life.

At KRL Power, our 3.8V battery solutions are engineered for applications where space efficiency, lightweight design, and stable high-output performance are critical — including smart electronics, medical devices, and next-generation wearables.

Higher Voltage, Higher System Efficiency

With a nominal voltage of 3.8V and charging up to 4.35V, these batteries enable reduced cell count in battery packs, simplifying system architecture and lowering overall cost.
Compared to standard lithium-ion batteries, KRL’s 3.8V cells provide:

This makes them ideal for OEMs seeking high-performance energy solutions without increasing product size.

Custom 3.8V Lithium Battery Packs from KRL Power

As a professional lithium battery manufacturer, KRL provides end-to-end battery customization services — from cell selection to full pack integration.
Our capabilities include:

We support projects from prototype development to mass production, ensuring reliability, scalability, and consistent quality.

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Your Trusted 3.8V Lithium Battery Manufacturer & Strategic Partner
Working with KRL Power means partnering with an experienced R&D team that deeply understands your product performance and integration needs. We offer flexible OEM/ODM services, fast production cycles, and expert technical support.ked by batteries that deliver.

Our 3.8V high-voltage lithium batteries are already widely deployed in projects across consumer electronics, smart medical devices, wireless communication, and embedded systems. With our strict quality control and commitment to innovation, we help you develop smarter, more powerful, and lighter products—backed by a reliable global supply chain.

Why Upgrade to 3.8V Lithium Batteries for Your Business?

Higher Voltage Platform, Greater Efficiency, Smarter Integration.

Compared to conventional 3.7V cells, our 3.8V lithium batteries, built on advanced high-voltage NCM (Nickel Cobalt Manganese) chemistry, offer a superior energy-to-volume ratio and optimized discharge performance. They provide the perfect balance of power, safety, and scalability for industrial-grade and consumer product development.

Higher Voltage for Greater Output Efficiency

The 3.8V nominal voltage delivers more usable energy with fewer cells, enhancing power conversion efficiency and reducing internal losses. This is especially valuable for high-drain applications such as 5G terminals, smart security cameras, and professional-grade handheld instruments.

Breakthrough Energy Density in a Compact Size

Thanks to advanced NCM chemistry, 3.8V cells achieve greater energy storage per gram and cubic centimeter. This allows product designers to create thinner, lighter devices without sacrificing a single minute of battery life—ideal for next-gen tablets, smart wearables, and portable medical monitors.

Seamless Integration with Smart BMS/PCM Systems

Our 3.8V lithium batteries are fully compatible with intelligent Battery Management Systems (BMS), offering real-time monitoring of voltage, temperature, and capacity. They support fast charging, precise cell balancing, and industrial-grade thermal management for extreme operating conditions.

Full-Cycle OEM/ODM Customization with Global Compliance

We provide comprehensive turnkey customization services, including voltage, capacity, custom dimensions, wire gauges, and connectors. All KRL batteries strictly comply with international safety standards and can easily pass certifications such as UN38.3, IEC62133, CE, RoHS, and MSDS, ensuring smooth global distribution for your end products.

3.8V Lithium Battery Applications

KRL 3.8V lithium batteries are designed for high-performance electronic and industrial systems that require a higher voltage platform, greater energy density, and a highly compact power architecture.

High-End Smartphones & Tablets

3.8V lithium batteries are the industry standard for flagship mobile devices, offering extended standby life and seamless space-saving integration thanks to their high energy output.

TWS Earbuds & Smart Wearables

Utilizing an ultra-thin pouch design and lightweight build, our 3.8V cells are critical for TWS earbuds, smartwatches, and fitness trackers, where maximizing runtime in a micro-footprint is essential.

Medical Electronics & Portable Diagnostics

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.

VR/AR & Visual Electronics

These high-voltage batteries are also suitable for virtual/augmented reality headsets and micro projectors, which demand high performance and compact battery integration.

Accelerate Your Product Launch with KRL Power

Looking for efficient power solutions without the long lead times? As a professional source manufacturer of 3.8V lithium batteries, we provide reliable supply, competitive factory-direct pricing, and 1-on-1 expert technical support.

Whether you need samples for R&D evaluation or bulk procurement for mass production, our team is ready to scale with your business.

Submit your application requirements now, and our engineering team will match you with the optimal battery solution within 24 hours!

3.8V Lithium Battery – Frequently Asked Questions

What is the difference between 3.8V and 3.7V lithium batteries?

The primary difference lies in the operating voltage and energy density. 3.8V batteries operate at a higher nominal voltage and support a higher charging cutoff voltage (typically 4.35V compared to 4.2V). This allows them to store and release more energy within the exact same physical footprint, significantly improving device runtime.

Do 3.8V high-voltage batteries require special chargers?

Yes. To ensure maximum cycle life and safety, 3.8V batteries must be paired with charging ICs or adapters specifically designed for a 4.35V cutoff voltage. Using standard 4.2V chargers will result in undercharging (reduced capacity). Our team can provide full BMS and charging parameter guidance.

Are 3.8V batteries safe for long-term use?

Absolutely. KRL 3.8V batteries utilize highly stable NCM chemistry and are equipped with advanced protection circuit modules (PCM) that guard against overcharging, over-discharging, short circuits, and overheating. They undergo rigorous drop, crush, and thermal shock testing to guarantee long-term safety.

Can KRL customize the battery size and capacity for my specific device enclosure?

Yes, flexible customization is our core strength. We have a vast library of existing tooling, and we can also engineer fully custom dimensions (length, width, thickness) and capacities based on your product's 3D structural constraints to ensure a 100% perfect fit.

What is the typical lead time for custom battery samples and mass production?

For standard structural customizations, samples are typically ready within 7-15 days. Mass production lead times generally range from 3 to 4 weeks depending on order volume and material availability. We work closely with your supply chain to meet strict launch deadlines.