About US
We Power Laptops.
We Also Power Ventilators.
ETESBAY is a professional laptop battery manufacturer and medical-grade battery supplier based in Shenzhen, China. For over 10 years, our factory has delivered stable, safe, and efficient power solutions to B2B clients across 50+ countries.
From Shenzhen Factory to Global Battery Partner
Welcome to ETESBAY — your trusted partner in professional battery solutions. With over 10 years of manufacturing excellence in Shenzhen, we specialize in producing high-quality laptop replacement batteries and medical-grade batteries that power devices from office desks to operating tables.
What sets ETESBAY apart is our medical-grade quality standard. As a factory that produces both consumer and medical batteries, we apply the same uncompromising safety protocols across all product lines. This means when you choose ETESBAY, you're getting batteries built to specifications far exceeding typical white-label alternatives.
We serve B2B clients worldwide, offering flexible solutions from wholesale procurement to OEM/ODM custom battery design. Our factory-direct pricing model eliminates middlemen, delivering brand-level quality at competitive factory rates.
Get Wholesale PricingIndustrial-Grade Manufacturing Capabilities
From raw cell inspection to finished battery testing, every step is controlled in-house to ensure consistent quality and shorter lead times.
Cell Grading & Matching
Advanced cell testing and grading systems ensure every battery pack is built with matched cells for optimal capacity and cycle life.
BMS Custom Design
In-house battery management system design protects against overcharge, over-discharge, short circuits, and thermal runaway.
Automated Assembly
Modern production lines combine automated spot welding, precision welding, and manual QC checkpoints for reliable output.
Aging & Cycle Testing
Every finished battery undergoes aging tests, cycle verification, and electrical parameter checks before leaving our factory.
OEM/ODM Customization
From label design to fully custom battery packs, we support private-label programs, packaging design, and technical documentation.
Global Export Ready
Experience shipping to 50+ countries with compliant labeling, MSDS, UN38.3 documentation, and flexible logistics support.
Our 4-Step Manufacturing Standard
A controlled process that turns medical-grade discipline into every battery we produce.
Raw Material Inspection
Every cell is inspected for capacity, internal resistance, and voltage consistency before entering production.
Precision Assembly
Automated welding and BMS integration with strict parameter controls for each battery model.
100% Functional Test
Every battery is charged, discharged, and checked for protection function before aging.
Final QC & Packaging
Appearance check, labeling verification, and export-ready packaging with full documentation.
What We Stand For
Our values guide every decision we make — from the factory floor to the final customer interaction.
Safety First
We treat every battery as if it could end up in a hospital. Our medical-grade safety protocols apply across all product lines.
Factory-Direct Integrity
No middlemen, no hidden layers. We own the manufacturing process, so we own the quality promise.
Consistent Quality
From the first batch to the thousandth, every battery goes through the same rigorous testing and inspection.
Customer Partnership
We don't just fill orders. We work with distributors, resellers, and equipment makers to design solutions that fit their markets.
Compliant with International Standards
(In Progress)
Ready to Power Your Business?
Whether you need wholesale laptop batteries, certified medical batteries, or custom OEM/ODM solutions, ETESBAY delivers factory-direct quality with a medical-grade mindset.
Contact Our Factory Team →