3.85V 9500mAh Lithium ion Battery 126773

Many modern electronic devices are constrained by energy density rather than physical space. Standard 3.7V lithium batteries often struggle to deliver sufficient usable energy without increasing battery size or adding more cells.

The 126773 lithium-ion battery addresses this limitation by combining a higher nominal voltage, higher charge voltage, and ultra-high capacity—enabling longer runtime and more efficient system design for advanced electronic products.

Part 1. What problem does this battery solve?

Traditional 3.7V batteries limit total energy output in space-constrained designs. Increasing runtime usually means adding cells, which raises cost, complexity, and size.

• 3.85V nominal voltage for higher energy density

• 4.4V charge voltage for increased usable capacity

• 9500mAh ultra-high capacity in a single cell

This combination allows designers to achieve longer runtime, fewer cells, and a simpler power architecture.

Part 2. Why choose 3.85V instead of standard 3.7V?

This is often the first question engineers ask when evaluating high-energy batteries.

• More energy stored per charge cycle

• Improved DC-DC conversion efficiency

• More stable device performance over discharge

In practical terms, a 3.85V battery delivers more watt-hours without increasing battery size—making it ideal for energy-demanding applications.

Part 3. Is 4.4V charging safe and reliable?

Yes—when the battery is specifically designed for high-voltage charging.

• High-voltage lithium chemistry designed for 4.4V

• Not a forced overcharge of standard 4.2V cells

• Compatible with dedicated 4.4V charging ICs

This design enables higher capacity while maintaining safety, reliability, and long-term performance.

Part 4. How does 9500mAh capacity impact real-world runtime?

Capacity directly affects user experience, maintenance cycles, and device availability.

• Longer continuous operation time

• Reduced charging frequency

• Lower depth-of-discharge stress per cycle

This is especially beneficial for field devices, limited-access charging environments, and systems designed for long standby or operating cycles.

Use our calculator to quickly estimate battery runtime.

Part 5. Why watt-hours (Wh) matter more than mAh

While mAh is commonly referenced, watt-hours provide the true measure of total energy.

• Nominal voltage: 3.85V

• Capacity: 9500mAh

The result is significantly higher total energy compared to standard 3.7V batteries of similar size—meaning longer runtime and fewer batteries required at the system level.

Use our online calculator for quick Wh to mAh conversion.

Part 6. System design benefits for engineers

From an engineering perspective, this battery simplifies both electrical and mechanical design.

• Fewer cells needed to meet runtime targets

• Simplified battery pack architecture

• Improved efficiency in power management circuits

• Better support for high-load and peak-current demands

These advantages reduce BOM cost, shorten development cycles, and improve overall product reliability.

Part 7. Typical applications where this battery excels

Customers often ask whether this battery fits their specific product category.

• Industrial portable equipment

• Medical and healthcare electronics

• High-end consumer devices

• Energy storage modules

• Smart devices requiring extended runtime

Any application that values high energy density and stable voltage output is a strong candidate.

Part 8. Customization and OEM/ODM support

Customization is a key requirement for many OEM and ODM customers.

• Custom sizes and shapes

• Custom nominal and charge voltages

• Custom capacities and discharge rates

• Complete battery pack development

This battery can serve as a reference design—not a limitation.

Part 9. Who should choose this battery?

This solution is ideal for teams that:

• Need longer runtime without increasing size

• Plan to upgrade from standard 3.7V cells

• Design products with high power or long duty cycles

• Require stable, high-energy battery solutions

Part 10. Final takeaway

The 126773 3.85V 9500mAh lithium-ion battery is not just a higher-capacity cell—it is a system-level upgrade.

By combining a 3.85V nominal voltage, 4.4V charging capability, and ultra-high 9500mAh capacity, it enables better performance, longer runtime, and more efficient product design.