Spare 10440 Cell Battery
Ships ground only — no air or expedited shipping.
The 10440 Lithium-Ion 3.7V 350mAh Battery is built for users who require more than what a standard AAA can deliver. With 3.7V output and 350mAh capacity, it powers select high-lumen tools—like the ReyLight Copper AAA/10440 flashlight—with increased brightness and extended runtime.
This cell is not for casual use. It’s engineered for compatibility with smart, BMS-equipped devices that are designed to handle higher voltage. When used correctly, it offers repeatable, reliable performance for tactical lighting, EDC kits, and professional loadouts.
"A prudent person foresees danger ahead and takes precautions. The simpleton goes blindly on and suffers the consequences. - Proverbs 27:12"
High Output Performance
3.7V power increases brightness for compatible lights
Rechargeable Efficiency
Up to 2000 cycles with proper charging care
Compact Energy
AAA-sized cell fits select high-performance lights
Trusted by Enthusiasts & Pros
Preferred by flashlight builders and EDC users who know their gear
Use only in devices designed for 3.7V 10440 lithium-ion cells
Charge only with verified 10440-compatible lithium-ion chargers
Do NOT store loose—always use a protective battery case
Avoid contact with water, heat, or metal objects
Do not use damaged batteries (torn wraps, dents, or exposed insulators)
Never overcharge above 4.2V or discharge below 3.0V
The numbers, flat and honest.
| Model | 10440 ICR Lithium-Ion |
|---|---|
| Voltage | 3.7V |
| Capacity | 350mAh |
| Size | Diameter 0.41 in, Height 1.75 in |
| Max Charge Voltage | 4.2V |
| Recommended Charge Rate | 0.5A–1A |
| Cycle Life | Up to 2000 cycles (with proper care) |
| Packaging | Ships via ground only (Lithium hazmat compliance) |
WHY YOU’RE BUYING FROM STAY READY.
We aren’t the Amazon of survival. We’re a small, opinionated shop that carries gear we’d stake our own lives on — and we back every piece with real support.
Curated
Every brand we carry has been vetted in the field by our team. If it doesn’t pass our 30-day use test, we don’t stock it.
Authenticated
Factory-direct from authorized dealers. No grey-market, no refurb, no knockoffs. Your warranty is real.
Supported
Real humans on phone, text, and email — seven days a week. We carry this gear ourselves and we stand behind it.
American
HQ in California. Orders ship from our US warehouse. US-based customer care.
GOVERNMENT CONTRACT EDC
What the federal government orders — released to civilians. Specialty EDC since 1992.
CountyComm started in 1992 in Sunnyvale, California, designing and producing specialty gear for federal, state, and local government agencies. The catch: anything that doesn't get shipped to a contract ends up on their public storefront — which is how civilians end up with the same EDC, watches, and tactical kit that ships in agency loadouts. They also carry the full Maratac line. Every product runs through multi-iteration field testing before it goes out the door.
- Founded in 1992 in Sunnyvale, California
- Designs and produces gear for federal, state, and local government
- Civilian releases sourced from government contract overruns
- Carries the complete Maratac brand line
- Multi-iteration field testing on every product
Answers, straight up.
Product-specific questions on the left. Shopping with SRO on the right. Both open-ended — hit us if we missed one.
How long does shipping take?
Most orders process within 1–3 business days from our warehouse. From there: 5–7 business days economy, 2–3 business days expedited, or overnight if you need it fast. Free economy shipping on orders over $150 (contiguous US). Alaska, Hawaii, and Pro Eagle / freight items are quoted at checkout. You’ll get a tracking number and link the moment your order ships.
What’s your return policy?
30 days from the day your order arrives. Gear has to come back unused, with all original tags, stickers, and packaging intact. For standard items we’ll send a prepaid return label and deduct return shipping from your refund. Oversized or freight returns are on you, unless the item showed up damaged, defective, or wrong — in which case we cover it.
Refunds hit your original payment method within 10 business days of approval.
What can’t I return?
Final-sale items, gift cards, food and drink products, personal-care items, anything customized or engraved, briefs (hygiene), and hazardous materials. If you’re not sure whether something qualifies, email us before you order — we’ll tell you straight.
Do you ship outside the contiguous US?
Yes. Alaska, Hawaii, and US territories ship on freight-quoted rates calculated after checkout. International orders are available worldwide at variable rates; duties and import fees are the customer’s responsibility. EU customers get a 14-day cancellation window per EU consumer law, on top of our standard return policy.
My package arrived damaged — what now?
Email info@stayreadyoutdoors.com within 7 days of delivery with your order number and clear photos of the damage (product + packaging). We’ll replace, refund, or ship a return label on us — no back-and-forth. Damaged, defective, or wrong-item claims never cost you shipping.
Can I talk to a human before buying?
Yes. Email info@stayreadyoutdoors.com — we answer every message ourselves, usually within a few hours during business days. We carry this gear, we use this gear, and we’d rather talk you out of a kit that doesn’t fit your mission than sell you the wrong one.
Do you offer a military/first-responder discount?
Yes. Active-duty and veteran military, police, fire, EMS, and medical first responders get 10% off every order. Verify through GovX at checkout — one-time, secure, and reusable across thousands of brands. Discount applies automatically once you’re verified.