17670 Charger

17670 Charger – Dedicated Chargers for 17mm Diameter Extended Li-ion/NiMH Cells, Precision & Safe Charging Management

Welcome to our 17670 Charger collection. The 17670 battery (approx. 17mm diameter × 67mm length) is an extended cylindrical cell available in both Li-ion and NiMH chemistries. Li-ion versions feature a nominal voltage of 3.7V, full charge of 4.2V, and typical capacities ranging from 1400mAh to 2000mAh; NiMH versions feature a nominal voltage of 1.2V with capacities up to 3600mAh–4000mAh. Its unique combination of 17mm diameter and 67mm length means it can fit the length adjustment of most 18650 chargers, but places special demands on negative terminal spring tension and diameter compatibility. The 17670 is often used as a rechargeable replacement for two CR123A primary cells (one 17670 replaces two CR123As in series), widely applied in high-lumen flashlights, Surefire tactical lights, medical devices, digital cameras, power tools, and various portable electronic devices. This collection features high-quality chargers specifically designed for or perfectly compatible with 17670 cells—ranging from single-bay portable chargers to multi-bay digital chargers—ensuring your 17670 batteries are recharged in the safest, most efficient, and most precise manner.

17670 Battery Key Specifications

Core Advantages of 17670 Chargers

• Perfect Size Compatibility with Secure Fit: 17670 cells are ~67mm long (slightly longer than 18650's 65mm) and ~17mm in diameter (slimmer than 18650's 18mm). All chargers in this collection feature robust negative springs or adjustable tension to ensure secure contact for slim cells, preventing charging interruptions or high contact resistance.
• Multi-Chemistry Auto-Detection: Chargers in this collection support automatic detection of both Li-ion (3.7V) and NiMH (1.2V) chemistries. Select professional models (e.g., ANSMANN Lithium 4) also support LiFePO₄ (3.2V) mode, ensuring each battery type terminates at the correct voltage to prevent overcharging. LiFePO₄ 17670 cells are also available as an alternative for two CR123A replacements in emergency applications.
• Precision Adaptive Charging Current: With typical capacities of 1400mAh–2000mAh (Li-ion), 17670 cells charge best at 0.3A–0.5A. These chargers support adaptive or manually adjustable currents to prevent damage from excessive current and extend battery lifespan.
• 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.
• 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 multiple safety certifications.
• Protected Cell Compatibility: Protected 17670 cells can reach lengths of 68mm or more. Select chargers in this collection feature extended slider travel to accommodate protected 17670 cells perfectly.
• Independent Charging Channels: Multi-bay chargers control each slot independently—mix 17670, 18650, 21700, 16650, 14500, 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.

17670 Charger vs. 16650 Charger vs. 18650 Charger

Popular 17670 Charger Models – Quick Reference

Typical Specifications Range (17670 Chargers)

Typical Applications

How to Choose the Right 17670 Charger?

⚠️ 17670 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.
• Confirm Compatibility with 17mm Slim Cells: Some 18650 chargers have weak negative springs that cannot securely hold 17mm diameter 17670 cells, leading to poor contact. Verify product supports 17670 or 16650 sizes before purchase.
• Check Slider Travel for Protected Cells: Protected 17670 cells can reach up to 68mm or more in length. Ensure the charger's maximum supported length is ≥70mm before purchase.
• Select Appropriate Charge Current: 17670 cells charge best at 0.3A–0.5A (Li-ion) or 0.1C–0.2C (NiMH). 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 17670 Chargers?

• Genuine Brand Products: Chargers from XTAR, Nitecore, ANSMANN, and other global professional charger brands—reliable quality with full safety certifications.
• Precisely Compatible with 17670: Curated selection of models supporting 17mm diameter and 67mm length with secure grip—eliminates compatibility issues.
• Multi-Chemistry Compatibility: Select models support both Li-ion and NiMH batteries—one charger for multiple needs.
• One-Stop Shopping: 17670 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 17670 Charger for your needs. For volume quotes or technical inquiries, please contact our customer service team.