High-performance protected 18650 battery with multi-layer safety built into every cell.
Engineered for Nitecore flashlights, headlamps, and portable electronics that demand reliable 3.6V power.
- 3,600mAh capacity at 3.6V (12.96Wh)
- 3A continuous discharge current
- Built-in protection circuit: overcharge, over-discharge, short-circuit
- Pressure relief valve for thermal safety
- Nickel-plated stainless steel end protectors
- 500+ full charging cycles*
- Mercury, lead, and cadmium free
- 49g / 1.73 oz — 18650 button top form factor
The 18650 battery your gear deserves. Protected, rechargeable, built to last.
MAXIMUM CAPACITY IN A STANDARD SIZE — 3,600mAh packs into the standard 18650 form factor (69.8mm × 18.6mm), delivering stable power across flashlights, headlamps, and portable electronics that accept button top 18650 cells.
BUILT TO LAST HUNDREDS OF CYCLES — Rechargeable over 500 times*, the NL1836 is a long-term investment. One cell, charged weekly, serves you for years — a fraction of the cost of buying disposables.
STEADY 3A CONTINUOUS DISCHARGE — The NL1836 sustains 3A of continuous current, keeping your devices running at consistent output over extended sessions. Pair it with the NL1836HP (8A) if your gear demands higher drain.
CERTIFIED AND GLOBALLY INSURED — CE certified with multiple global certifications approved, the NL1836 meets international standards for safe use, storage, and transport. This is a cell you can trust in your professional and personal gear.
WHY CHOOSE THE NITECORE NL1836?
High Energy Density
12.96Wh packed into just 49 grams — that's strong energy-to-weight performance for an 18650 cell, keeping your flashlights and headlamps running longer between charges.
Precision Manufacturing
Built to ±0.3mm dimensional tolerances (18.6mm diameter, 69.8mm length), ensuring a consistent, snug fit in every 18650-compatible device — with the same reliable performance cell after cell.
Broad Charger Compatibility
Works with Nitecore's range of smart chargers including the UMS2, UMS4, Ci2, and Ci4 — plus any quality charger designed for protected 18650 cells.
Global Safety Certifications
CE certified and globally insured. Every NL1836 meets international standards for safe use, storage, and transport — the same quality assurance across every cell.
Three layers of internal protection engineered into every cell.
Built for Peace of Mind
The NL1836's positive-polarity protection circuit continuously monitors for overcharge, over-discharge, and short-circuit conditions — shutting down current flow before damage occurs.
A high-quality battery protection IC manages the monitoring logic, while high-power MOS-FET components in the current regulation module deliver better efficiency and superior output.
If the cell experiences a rapid temperature increase — from a fault condition or external heat source — the pressure relief valve activates to safely vent pressure before it becomes dangerous.
These internal safeguards work together to protect the cell independently — an extra layer of safety on top of whatever protection your device already provides.
Tough on the outside. Clean on the inside.
STAINLESS STEEL END PROTECTION — Both the positive and negative terminals are equipped with nickel-plated stainless steel protectors. This provides high impact resistance, reliable electrical conductivity, and strong oxidation resistance — three things that matter when a battery lives inside a flashlight that gets dropped, rattled in a bag, or used in humid conditions.
ABRASION-RESISTANT WRAP — The cell body is coated with a durable metallic film that guards against scratches and abrasion from repeated insertion and removal.
ENVIRONMENTALLY RESPONSIBLE — Zero mercury, zero lead, zero cadmium. The NL1836 is designed for safe use and safe storage, with a clean chemistry that meets international environmental standards.
TECHNICAL SPECIFICATIONS
| Model | NL1836 |
| Type | Li-ion Rechargeable Battery (Protected, Button Top) |
| Size | 18650 |
| Capacity | 3,600mAh |
| Voltage | 3.6V (12.96Wh) |
| Continuous Discharge | 3A |
| Diameter | 18.6mm ± 0.3mm / 0.73" ± 0.01" |
| Length | 69.8mm ± 0.3mm / 2.75" ± 0.01" |
| Weight | 49g / 1.73 oz |
| Charge Cycles | 500+* |
| *The data from NITECORE Lab is calculated for reference only. | |
| Protection | Overcharge / Over-discharge / Short-circuit / Pressure Relief Valve |
| Certifications | CE Certified, Globally Insured |
| Environmental | Mercury Free, Lead Free, Cadmium Free |
| Warranty | 12 months from date of purchase |
COMPATIBLE NITECORE CHARGERS
| CHARGER | SLOTS | COMPATIBLE? |
| Nitecore UMS2 | 2-Bay | Yes |
| Nitecore UMS4 | 4-Bay | Yes |
| Nitecore Ci2 | 2-Bay | Yes |
| Nitecore Ci4 | 4-Bay | Yes |
*NOTE
Always use a smart charger designed for protected 18650 Li-ion button top batteries. Do not use unregulated or incompatible chargers.FREQUENTLY ASKED QUESTIONS
Q: Will the NL1836 work in my Nitecore flashlight?
A: The NL1836 is a protected button top 18650 cell. It fits any Nitecore flashlight or headlamp that accepts 18650 batteries with button top configuration. Check your device manual to confirm 18650 compatibility — some compact models require shorter or flat-top cells. The NL1836 measures 69.8mm in length and 18.6mm in diameter, so verify your device's battery compartment can accommodate a protected cell (which is slightly longer than unprotected 18650s).
Q: What's the difference between the NL1836, NL1836R, and NL1836HP?
A: All three are 3600mAh 18650 cells, but they're built for different use cases. The NL1836 (this product) has a 3A continuous discharge rating and is ideal for standard flashlights, headlamps, and portable electronics. The NL1836R adds a built-in USB-C charging port. The NL1836HP delivers 8A continuous discharge for high-drain devices. Choose based on whether you need USB-C recharging or higher current output.
Q: How many times can I recharge this battery?
A: The NL1836 supports over 500 full charge-discharge cycles. This data is from Nitecore Lab testing and is calculated for reference only — your actual results may vary depending on usage conditions and charging habits.
Q: Can I charge this with any 18650 charger?
A: Use a smart charger designed for protected button top Li-ion 18650 batteries. Nitecore recommends the UMS2, UMS4, Ci2, or Ci4. Avoid unregulated chargers or those not designed for protected cells, as the slightly longer length of protected batteries may not seat properly in all chargers.
What's In The Box
- 1x Nitecore NL1836 Rechargeable Battery — 3600mAh protected Li-ion 18650 button top cell
Power Your Gear with Confidence
GET YOUR NL1836 NOWYou’re Backed by Our 60-Day Ironclad Guarantee
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Try it for 60 days. If it’s not right for you, send it back.
We stand behind our gear. If you’re not happy with your purchase, just return the full package within 60 days and we’ll issue a full refund—no fuss, no forms, no hoops to jump through.
What Happens After You Order
- You’ll get an instant order confirmation email with your receipt.
- We’ll pack your order the next working day and send you a tracking number once it’s on the way.
- From the moment you order to the moment it reaches your hands, we’re here to keep you updated and supported.
When will I receive my gear?
- Singapore: Delivered to your doorstep in 4–6 working days.
- International: Arrive within 10–14 working days.
Returns and warranty
- Every product comes with a 1 to 3-year replacement warranty (depending on the item).
- If anything isn’t working right, just let us know. We’ll make it right.
FREE Gift with Purchase: Limited Edition Ember Shard Whistle
Spend $99 or more today, and we'll automatically include a limited-edition Glow-in-the-Dark Ember Shard Whistle when packing your order.
Charge it quickly under sunlight or your flashlight, and enjoy its subtle glow throughout the night—perfect for marking gear, emergency kits, or attaching to your bag.
Limited quantity available. Claim yours now!
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