Spare 10440 Cell Battery For Reylight / Peanut Beast Only!
Spare 10440 Cell Battery For Reylight / Peanut Beast Only!

Spare 10440 Cell Battery For Reylight / Peanut Beast Only!

Regular price $6.50
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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.



  • 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.
  • 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

    Where do you ship & how fast?

    We ship orders Worldwide. If you don't see your country as an option at checkout let us know and we can help.

    ServiceShipping TimeSpeed Of Delivery / Weight
    First Class Domestic2–5 Business DaysStandard ( under 16 Ounces )
    Priority Mail Domestic 1-4 Business DaysFast ( Over 16 Ounces )
    First Class International7+ Business Days - Varies by Destination & Customs ClearanceStandard ( Under 64 Ounces )
    Priority International 5+ Days - Varies by Destination & Customs ClearanceFast ( Over 64 Ounces )

    Customs delays in some cases can add a couple weeks of delays in some cases depending on time of year. For example during the holiday rush wait times can be longer for customs clearance so order early.

    How long does shipping take?

    We ship within 1-2 business days Monday - Friday

    How do I track my order?

    We want you to be excited and happy with everything you buy from CountyComm so we offer quick & easy returns so you never have to worry ( Click Here )

    Full 365 day warranty on all items we sell from defect or failure.
    We stand behind every product we sell 100% from watches to flashlights, we have you covered!

    Customer Reviews

    Based on 7 reviews
    William Little (San Antonio, US)

    I’m extremely satisfied with the quality products and fast service from County Com!

    Fred Nemiroff (Leesburg, US)
    Peanut beast 10440 battery

    I purchased this battery to extend the runtime on my titanium peanut beast. It definitely did the job!! I'm probably going to purchase another one to have as a spare. County Com is the best.

    Ler Hadziyianis (Hamden, US)
    Just as described

    Mike, you did it again! Fantastic brother… have two and they are just as stated!!! Please keep up the great work!
    Stay safe brother!

    Thomas Rohling (Hernando, US)
    Extra Power

    Don’t get Caught without a battery for the peanut extension. Works great as always.

    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.

    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

    Warning: This product may contains chemicals, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to