A Size Charger

A Size Charger – Dedicated Chargers for A-Size Cylindrical Li-ion & NiMH Cells, Precision & Safe Charging Management

Welcome to our A Size Charger collection. The A-size rechargeable battery (approx. 17mm diameter × 50mm length) is a cylindrical cell format that shares identical physical dimensions with common 14500 Li-ion and AA batteries. However, unlike disposable AA alkaline batteries, A-size rechargeable cells encompass multiple chemistries including NiCd, NiMH, and Li-ion. NiCd/NiMH A-size batteries feature a nominal voltage of 1.2V with typical capacities around 1400mAh; Li-ion A-size batteries feature a nominal voltage of 3.7V with capacities ranging from 600mAh to 1000mAh. Some high-drain A-size Li-ion cells can even support up to 15A continuous discharge current, making them ideal for high-power industrial equipment, power tools, and premium electronics that demand frequent charge/discharge cycles.

Because A-size batteries have a slightly larger diameter (~17mm) compared to standard 14500/AA cells (~14mm) while sharing identical length and overall dimensions, selecting a multi-function charger that supports 14500/AA size with sufficiently wide charging bays is essential for safe and efficient charging. This collection features high-quality A-size compatible chargers from global professional brands like XTAR, Tenergy, and Nitecore—ranging from single-bay portable chargers to multi-bay digital chargers—ensuring your A-size batteries are recharged in the safest, most efficient, and most precise manner.

A Size Battery Key Specifications

Core Advantages of A Size Chargers

• Perfect Size Compatibility with Secure Fit: A-size cells are ~50mm long and ~17mm in diameter—slightly wider than standard 14500/AA cells (~14mm diameter). All chargers in this collection support 14500/AA size and feature bay widths that comfortably fit 17mm diameter cells, ensuring secure contact 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., Tenergy TN456) also support manual current selection (300mA–1000mA) and a dedicated TEST mode for accurate capacity and internal resistance measurement. The XTAR MC4S supports 4.2V output with up to 1A charging current, capable of charging up to 4 A/AA/AAA batteries simultaneously.
• Precision Adaptive Charging Current: With typical capacities of 600mAh–1400mAh, A-size cells charge best at 0.3A–1.0A. These chargers support adaptive or manually adjustable currents to prevent damage from excessive current and extend battery lifespan.
• CC/CV Smart Charging Management: Utilizes constant-current/constant-voltage (CC/CV) charging profiles controlled by built-in microprocessors (MCU). The charger automatically detects battery status and precisely controls charging current and cut-off voltage. Typical cut-off accuracy reaches 4.2V ±0.05V (Li-ion) or 1.45V–1.5V (NiMH), automatically terminating upon full charge to prevent overcharging and maximize battery cycle life.
• Multiple Safety Protections: Built-in protections against overcharge, over-discharge, overcurrent, short-circuit, reverse polarity, and overheat ensure comprehensive charging safety. Most products feature ABS fire-retardant housing and are certified to CE, FCC, and RoHS international safety standards.
• Independent Charging Channels: Multi-bay chargers feature independently controlled channels, allowing simultaneous charging of different battery models, capacities, and charge levels—mix A-size, 14500, AA, AAA, 18650, and other cell sizes without interference. The Tenergy TN456 supports 4 independently personalized slots, with each slot allowing individual current and mode settings.
• LCD Display & Advanced Features: Mid-to-high-end models feature high-definition LCD screens displaying real-time charging voltage, charging current, accumulated capacity, and internal resistance. The Tenergy TN456 supports one-button toggling between charge/discharge capacity, battery voltage, current, internal resistance, and elapsed time.

Popular A Size Charger Models – Quick Reference

Typical Specifications Range (A Size Chargers)

Typical Applications

How to Choose the Right A Size Charger?

⚠️ A Size Charger Safety Guidelines

• Distinguish Battery Chemistry: 3.7V Li-ion (full charge 4.2V) 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.
• Verify Size Compatibility: A-size cells are ~50mm long and ~17mm in diameter. Before purchase, confirm the charger supports 14500/AA size and the bay width accommodates 17mm diameter cells.
• Select Appropriate Charge Current: A-size cells charge best at 0.3A–1.0A. If manual setting is available, select an appropriate current based on battery specifications.
• Avoid Extreme Temperature Charging: The ideal charging temperature for Li-ion batteries is 10°C–45°C. Never charge batteries below freezing (0°C/32°F)—this can cause permanent, dangerous metallic lithium plating inside the cell. Keep away from heat sources and direct sunlight; ensure good ventilation during charging.
• Avoid Overcharge and Over-Discharge: Although chargers feature auto-termination, keeping batteries at 100% charge for extended periods accelerates aging. Avoid deep discharge below 2.5V (Li-ion) or 1.0V (NiMH).
• Remove After Full Charge: Prolonged connection to power may still affect battery longevity. Remove batteries promptly after charging.

Why Choose Our A Size Chargers?

• Genuine Brand Products: Chargers from XTAR, Tenergy, Nitecore, LiitoKala, and other global professional charger brands—reliable quality with full safety certifications.
• Precisely Compatible with A-Size: Curated selection of models supporting 14500/AA size with sufficiently wide bays—eliminates compatibility issues.
• Multi-Chemistry Compatibility: Select models support both Li-ion and NiMH batteries—one charger for multiple needs.
• One-Stop Shopping: A-size 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 A Size Charger for your needs. For volume quotes or technical inquiries, please contact our customer service team.