18490 Charger

18490 Charger – Dedicated Chargers for 18mm Diameter Medium Li-ion/NiMH Cells, Precision & Safe Charging Management

Welcome to our 18490 Charger collection. The 18490 battery (approx. 18mm diameter × 49mm length) is a medium-sized cylindrical Li-ion/NiMH cell positioned between the 18350 (~35mm) and 18500 (~50mm). Li-ion versions feature a nominal voltage of 3.7V, full charge of 4.2V, and typical capacities ranging from 1100mAh to 2000mAh, with high-drain IMR models supporting 15C+ continuous discharge; NiMH versions feature a nominal voltage of 1.2V. Its unique combination of 18mm diameter and 49mm length places special demands on slider adjustment range, negative terminal spring tension, and chemistry detection. The 18490 is often used as a rechargeable replacement for two CR123A primary cells, widely applied in tactical flashlights, e-cigarettes, medical devices, power banks, security equipment, wireless microphones, and various portable electronic devices. This collection features high-quality chargers specifically designed for or perfectly compatible with 18490 cells—ranging from single-bay portable chargers to multi-bay digital chargers—ensuring your 18490 batteries are recharged in the safest, most efficient, and most precise manner.

18490 Battery Key Specifications

Core Advantages of 18490 Chargers

• Perfect Size Compatibility with Secure Fit: At ~49mm long—positioned between 18350 (35mm) and 18650 (65mm)—18490 cells require chargers with adjustable sliders. All chargers in this collection feature slider travel that perfectly accommodates 49mm length, ensuring secure contact for medium cells and preventing charging interruptions or high contact resistance.
• Multi-Chemistry Auto-Detection: Most chargers in this collection support automatic detection of both Li-ion (3.7V) and NiMH (1.2V) chemistries. Select professional models (e.g., Nitecore D4) also support LiFePO₄ (3.2V) mode, ensuring each battery type terminates at the correct voltage to prevent overcharging.
• Precision Adaptive Charging Current: With typical capacities of 1100mAh–2000mAh (Li-ion), 18490 cells charge best at 0.2A–0.5A. These chargers support adaptive or manually adjustable currents to prevent damage from excessive current and extend battery lifespan. Models like the Nitecore Ci2 support up to 3000mA fast charging while automatically reducing current for smaller cells.
• Smart Charging Management: Utilizes constant-current/constant-voltage (CC/CV) charging profile for Li-ion, or -ΔV/dT/dt termination for NiMH, with automatic battery state detection. Charging terminates precisely at the correct cut-off voltage, effectively preventing overcharging and ensuring battery safety. Some chargers can also automatically activate over-discharged batteries and detect/reject damaged cells.
• Multiple Safety Protections: Built-in overcharge, over-discharge, overcurrent, short-circuit, reverse polarity, and overheat protection for comprehensive charging safety. Many chargers use fire-retardant materials and have passed CE, FCC, and RoHS safety certifications.
• Independent Charging Channels: Multi-bay chargers control each slot independently—mix 18490, 18650, 21700, 18350, 18500, and other cell sizes with different charge levels without interference.
• LCD Digital Display: Real-time monitoring of charging voltage, current, accumulated capacity, and internal resistance—charging status at a glance.

18490 Charger vs. 18500 Charger vs. 18650 Charger

Popular 18490 Charger Models – Quick Reference

Typical Specifications Range (18490 Chargers)

Typical Applications

How to Choose the Right 18490 Charger?

⚠️ 18490 Charger Safety Guidelines

• Distinguish Battery Chemistry: 3.7V Li-ion (full charge 4.2V), 3.2V LiFePO₄ (full charge 3.65V), and 1.2V NiMH (full charge 1.45V) require different modes—do not mix. Ensure the charger has correctly identified or manually set the appropriate mode before charging. Never charge a NiMH battery with a Li-ion charger, or vice versa—this can lead to overheating, reduced lifespan, or even safety hazards.
• Confirm 18490 Size Compatibility: 18490 cells are ~49mm long—about 16mm shorter than 18650s. Some 18650 chargers cannot securely hold this length. Verify product specifications explicitly list 18490 or 18500 support before purchase.
• Select Appropriate Charge Current: 18490 cells charge best at 0.2A–0.5A (Li-ion). If manual setting is available, select a low current; if adaptive, ensure proper detection.
• Avoid High-Temperature Charging: Keep away from heat sources and direct sunlight; ensure good ventilation during charging.
• Remove After Full Charge: Although chargers feature auto-termination, prolonged connection to power may still affect battery longevity. Remove batteries promptly after charging.

Why Choose Our 18490 Chargers?

• Genuine Brand Products: Chargers from XTAR, Nitecore, and other global professional charger brands—reliable quality with full safety certifications.
• Precisely Compatible with 18490: Curated selection of models supporting 18mm diameter and 49mm length with secure grip—eliminates compatibility issues.
• Multi-Chemistry Compatibility: Select models support Li-ion, NiMH, and LiFePO₄ batteries—one charger for multiple needs.
• One-Stop Shopping: 18490 batteries, chargers, and accessories all in one place—save time and effort.
• Flexible Purchasing: Single-unit retail and bulk wholesale options available for both individual and enterprise needs.
• Certified & Safe: CE, FCC, RoHS certifications ensure quality and safety.
• Expert Technical Support: Guidance on charger selection, usage tips, and after-sales support.

👇👇👇 Browse the product list below to find the perfect 18490 Charger for your needs. For volume quotes or technical inquiries, please contact our customer service team.