10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
1-Year_Free_Warranty - UltraFire
1-Year_Free_Warranty - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
1-Year_Free_Warranty - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - 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: 46mm x 10mm x 10mm
$16.71
SALE % OFF

Free Shipping 

Easy Returns

1-Year Warranty
Included

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

  • reviews

Brand

UltraFire
Title

Battery Type

10440
Title

Material

Li-ion
Title

Capacity

500mAh (Actual: 320mAh)
Title

Rated Voltage

3.7V
Title

Charge Termination Voltage

4.2V
Title

Maximum Charge Current

320mA
Title

Maximum Discharge Current

320mA
Title

Size

46mm x 10mm x 10mm
Title

Weight

30g
Title

Chargeable

Yes
Title

Protective Case

Yes
Title

Certifications

CE, FCC, MSDS, UN38.8

Customer Reviews

Based on 3 reviews
100%
(3)
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(0)
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C
Chloe_Adventurer
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.

S
Sarah_Skywalker
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.

J
Jake_Maverick
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."
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
1-Year_Free_Warranty - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack) - Protected - UltraFire
1-Year_Free_Warranty - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire

UltraFire® 10440 Battery