10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire

UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire

UltraFire® 10440 Battery

500mAh | 3.7V | Protected
The UltraFire 10440 500mAh battery delivers compact, protected, and reliable 3.7V power for small flashlights and gadgets.
Size: Ø10 × 46mm

"For this price, the quality is honestly unbeatable."

- Ashley White

"Showed up fast, packed well, everything perfect."

- Megan Thompson

$16.71

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Free Shipping

Easy Returns

1-Year Warranty

Included

2 PCS

Features

Compact, Reliable Power
Each 10440 Li-ion battery delivers 500mAh (320mAh actual) with a stable 3.7V output, perfect for small flashlights, gadgets, and portable electronics.

Built-In Protection Circuit
Equipped with overcharge, over-discharge, and short-circuit protection, these batteries ensure safe and worry-free operation.

Rechargeable & Efficient
Supports repeated charging cycles with a 4.2V charge termination and 320mA maximum current, offering dependable performance for your devices.

Certified & Portable
Lightweight at 30g and compact at 46×10mm, these batteries are CE, FCC, MSDS, and UN38.8 certified, giving you trusted quality in a small, convenient package.

Use Cases

AAA Size 3.7V Lithium Cell

Keychain EDC (Everyday Carry) Flashlights

High-Output Micro Penlights

Ultra-Compact Tactical Torches

Micro RC (Radio Control) Models

High-Powered Pen Laser Pointers

Precision DIY Electronics Projects

Miniature Robotics Power Supply

Compact Medical Penlights

Portable Dental Instruments

Photography Shutter Remote Power

Custom Mini Battery Packs

High-Voltage AAA Alternative

Specifications

Brand

UltraFire

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Battery Type

10440

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Material

Li-ion

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Capacity

500mAh (Actual: 320mAh)

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Rated Voltage

3.7V

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Charge Termination Voltage

4.2V

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Maximum Charge Current

320mA

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Maximum Discharge Current

320mA

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Size

Ø10 × 46mm

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Weight

30g

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Chargeable

Yes

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Protective Case

Yes

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Certifications

CE, FCC, MSDS, UN38.8

Reviews

Reliable Power for Gadgets

These batteries are a game-changer for my gadgets. The charge-discharge cycle is impressive, and they recharge quickly. Definitely worth the investment if you need reliable power sources.

Great Value with Protection

Great value for the price. The protection board is a nice feature, giving me peace of mind against overcharging. They fit perfectly in my flashlight and provide consistent power.

Fantastic Battery Life!

"I've been using these UltraFire batteries for a few weeks now, and they are fantastic! They hold a charge really well and seem to last longer than other brands I've tried. Perfect for my high-drain devices."