10440 - > AAA Size 3.7V 350 MAH 

• Model:3.7V 350MAH AAA ICR 10440 Battery
• Diameter:0.41 inch*Height:1.75 inch
• Do NOT use these batteries in flashlights that require 1.5V batteries.

Charging Output for 10440 Battery 4.2V @ 1A Max

Note only charge at .5A-1A for 10440 Cells to safely prolong the battery life upto 2000 cycles

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We have received hundreds of emails asking for a light which uses a 10440 cell battery.  We now have the ReyLight Copper AAA/10440 light which works with both cell variants. 

Why use a 10440 Lithium cell? Higher voltage = Much brighter & also rechargeable 

Warning: Dont use this cell in another AAA or Maratac light you have as it will void you warranty and destroy the light. Misusing or mishandling a lithium-ion battery may cause a FIRE or EXPLOSION which can result in INJURY or DEATH. You MUST read the safety warnings and resources before purchasing, using, and/or handling batteries.

• Misusing or mishandling lithium ion batteries can pose a SERIOUS RISK of personal injury, property damage, or death
• Only use in a device which as a smart BMS built in
• Note the length of the cell to ensure it will work in your application as well
• If your flashlight were the only device into which a buyer might attempt to insert the battery, there’d be no issue. However, since it is a great battery, others may buy it for other purposes. They need to be warned of its limitations.
• BATTERIES MAY EXPLODE, BURN, OR CAUSE A FIRE IF MISUSED OR MISHANDLED
• ONLY use with proper protection circuitry
• ONLY use within manufacturer specification
• DO NOT store loose in pocket, purse, etc. – always use a protective case
• KEEP AWAY from metal objects to prevent short circuiting
• DO NOT short circuit
• DO NOT use if wrapper or insulator is damaged or torn
• DO NOT use if damaged in any way
• DO NOT overcharge or over-discharge
• DO NOT modify, disassemble, puncture, cut, crush, or incinerate
• DO NOT expose to liquids or high temperatures
• DO NOT solder
• User must be familiar with handling lithium ion batteries before purchase
• Usage of batteries is AT YOUR OWN RISK

ONE SHEAR® Pro

• Original design, trusted by thousands of professionals worldwide
• Heavy-duty stainless steel build, designed for first responders, military, and tactical gear
• Cuts through tough fabrics, webbing, boots, and gear reliably
• Best for users who want a proven, all-around trauma shear

ONE SHEAR® V2 (DLC Coated, 2.25mm)

• The next evolution of the Pro with upgraded Diamond-Like Carbon coating
• DLC provides extreme durability, scratch resistance, and corrosion protection
• Built for the harshest environments and long-term heavy-duty use
• Ideal for paramedics, law enforcement, military, and survivalists who demand the toughest option

ONE SHEAR® Mini

• Compact, lightweight version for Everyday Carry (EDC)
• Cuts bandages, tape, paracord, and light materials with ease
• Perfect for range bags, hiking kits, glove compartments, and compact first aid setups
• Best choice for adventurers, outdoorsmen, and anyone needing a pocket-sized solution

ONE SHEAR® BUS (Basic Utility Shear, Fluoride Coated, 1.8mm)

• Budget-friendly model, crafted from rolled J2 420 steel with fluoride coating
• Great for medical students, training environments, and light clinical use
• Cuts bandages, gauze, and clothing but not designed for extreme-duty scenarios
• Ideal as a starter shear, classroom tool, or backup option

All Items are Shipped using USPS at this time; unless international orders than UPS.

Available USA Shipping options:

Processing times

Standard Processing: 3-5 days processing USPS

Skip The Line Processing: 1-2 day processing USPS

Available International (non-USA):

Under 1lbs: $40 UPS

1-lbs $70 UPS