Spare 10440 Cell Battery For Reylight Only! - CountyComm

Spare 10440 Cell Battery For Reylight Only!

Regular price $6.25
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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


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.

Customer Reviews

Based on 3 reviews
Jeb M (Columbus, US)
Great LIttle LIght

This light is so handy, remarkably bright, and inexpensive to operate with the rechargeable battery. That battery is responsible for the additional power this light provides. But as a bonus, any AAA battery can be used, although with a reduced output.

PAULIE D (Pittston, US)

It is always prudent to have a back-up at all times when it comes to your survival equipment and flashlights are no exception! Having a spare on stand-by is a good idea.

Fred Karasek (Rancho Cucamonga, US)
Perfect for my application

Charges to 4.1vdc and powers my ReyLight Copper AAA/10440 perfectly.
Totally satisfied with my purchase.

Zulu™ & Maratac™ Are Registered Trademarks Of CountyComm
WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to