CH4-4P DC5V Universal Four USB Battery Charger

The CH4-4P DC5V Universal Four USB Battery Charger is a compact multi-slot intelligent charging solution designed for simultaneously charging up to four rechargeable batteries with independent circuit protection and smart charging algorithms. Electronics professionals, hobbyists, and field technicians rely on this charger for maintaining AA, AAA, and 18650 lithium-ion batteries in demanding applications including IoT devices, robotics projects, and portable instrumentation. This charger solves the critical problem of managing multiple battery types and charge states simultaneously while preventing overcharging, short circuits, and thermal runaway conditions.

Product Overview

The CH4-4P operates on a DC5V input supply with four independent charging channels, each equipped with dedicated microprocessor control and constant-current constant-voltage (CC-CV) charging topology. The charger features intelligent battery detection that automatically identifies battery type and capacity, adjusting charging parameters in real-time to optimize charge cycles and extend battery lifespan. Each channel incorporates individual LED status indicators displaying charging progress, fully charged state, and fault conditions, allowing simultaneous monitoring of four different batteries without manual intervention.

This universal charger design accommodates multiple battery chemistries including NiMH, NiCd, and Li-ion batteries through firmware-based chemistry detection and adaptive charging curves. The integrated thermal management system includes temperature sensors that automatically reduce charging current if battery temperature exceeds safe operating thresholds, protecting expensive battery packs in field conditions. The compact form factor and USB power delivery compatibility make this charger ideal for field service technicians, embedded systems developers, and professionals managing distributed battery inventories across multiple project sites.

Key Specifications

Specification	Details
Product Type	Universal Four-Channel Battery Charger
Input Voltage	DC 5V USB Power Supply
Charging Channels	Four Independent Slots
Compatible Battery Types	AA, AAA, 18650 Li-ion, NiMH, NiCd
Charging Current Per Channel	500mA Maximum
Total Power Consumption	2.5W at Full Load
Battery Detection	Automatic Chemistry and Capacity Recognition
Safety Features	Overcharge Protection, Short Circuit Protection, Temperature Monitoring
LED Indicators	Individual Status per Channel (Charging/Charged/Error)
Operating Temperature	0 to 45 Degrees Celsius
Brand	Original Manufacturer
Origin	Original and Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• Four Independent Charging Channels with isolated circuits preventing cross-channel interference and enabling simultaneous charging of different battery types at optimal rates
• Intelligent Battery Detection System that automatically identifies battery chemistry, capacity, and health status, adjusting charging algorithms for maximum cycle life and safety
• Universal Battery Compatibility supporting AA, AAA, 18650 lithium-ion, and NiMH batteries, eliminating the need for multiple single-purpose chargers in professional environments
• Advanced Thermal Management with real-time temperature monitoring and automatic current reduction, protecting expensive battery investments in field deployment scenarios
• Individual LED Status Indicators on each channel providing instant visual feedback on charging progress, completion, and fault conditions without requiring external monitoring equipment
• Compact USB-Powered Design operating from standard 5V USB supplies, making it compatible with power banks, laptop USB ports, and solar charging systems in remote locations
• Overcharge and Short Circuit Protection with multi-level safety mechanisms preventing battery damage, fire hazards, and equipment damage in unattended charging scenarios
• Fast Charging Capability delivering 500mA per channel for rapid battery replenishment while maintaining safe charging curves and thermal stability

Applications and Use Cases

• IoT Device Maintenance where field technicians deploy multiple sensor nodes requiring frequent battery rotation and rapid turnaround charging in remote installations
• Robotics and Drone Operations supporting simultaneous charging of multiple battery packs used in autonomous systems, ensuring minimal downtime between field tests and competitions
• Emergency Response and Field Service where portable battery management is critical for maintaining communication devices, flashlights, and portable instrumentation during extended operations
• Educational Electronics Labs and Maker Spaces enabling students and hobbyists to safely charge diverse battery types while learning battery chemistry, charging algorithms, and power management principles
• Professional Photography and Video Production managing AA and AAA batteries for wireless microphones, flash units, and remote triggers across multiple simultaneous shoots
• Portable Medical Device Support charging batteries for portable ultrasound units, pulse oximeters, and diagnostic equipment in clinical and field medical settings
• Embedded Systems Development where engineers prototype and test battery-powered devices requiring frequent charge cycles and reliable power management validation

How to Use

Begin by connecting the CH4-4P to a DC 5V power source using a standard USB cable or compatible power adapter. The charger will initialize automatically, with all four LED indicators briefly illuminating to confirm operational status. Insert your first battery into any available charging slot, ensuring correct polarity alignment as indicated by the slot markings. The intelligent detection system will immediately identify the battery type and capacity, automatically configuring the appropriate charging parameters. Repeat this process for additional batteries, noting that each channel operates independently, allowing simultaneous charging of different battery types without manual intervention.

Monitor the LED indicators during the charging process. A steady amber or blue light indicates active charging, while a green light signals complete charge. If a red light appears, the charger has detected a fault condition such as reverse polarity, battery damage, or excessive temperature. In this case, remove the affected battery and inspect for physical damage or corrosion. The charger will automatically resume normal operation when the faulty battery is removed. For optimal battery longevity, avoid leaving fully charged batteries in the charger for extended periods. Remove batteries within 30 minutes of the completion indicator to prevent trickle charging and battery degradation. Store the charger in a cool, dry location and keep the USB input port free from moisture and debris.

Frequently Asked Questions

Can I charge different battery types simultaneously in different channels?

Yes, the CH4-4P is specifically designed for this capability. Each channel features independent circuit control and intelligent battery detection, allowing you to simultaneously charge AA alkaline, AAA NiMH, and 18650 lithium-ion batteries in different slots. The charger automatically configures appropriate charging curves for each battery type without requiring manual selection or channel configuration.

What happens if I insert a battery with incorrect polarity?

The charger incorporates reverse polarity protection that prevents damage to both the battery and charger circuitry. When incorrect polarity is detected, the affected channel will display a red error indicator and stop charging current delivery. Simply remove and reinsert the battery with correct polarity alignment as marked on the slot. The channel will automatically resume normal operation once proper polarity is established.

How long does it take to fully charge a typical AA battery?

Charging time depends on battery capacity and chemistry. A standard 2000mAh NiMH AA battery typically charges in 4-5 hours at the charger's 500mA maximum current. Lithium-ion 18650 batteries with 2600-3000mAh capacity require approximately 5-6 hours. The charger automatically adjusts current in the final charging phase to prevent overcharging, extending total charge time but significantly improving battery cycle life and safety.

Is the charger safe for unattended operation?

Yes, the CH4-4P incorporates multiple safety mechanisms including overcharge protection, temperature monitoring, and short circuit detection, making it safe for unattended charging. However, we recommend removing fully charged batteries within 30 minutes of completion to prevent trickle charging and battery stress. Do not leave the charger powered continuously when not in active use, as this can degrade internal components over extended periods.

What power source should I use with this charger?

The charger requires a stable DC 5V power supply capable of delivering at least 2.5A under full load conditions when all four channels are actively charging. Compatible sources include USB power adapters rated 5V/2.5A or higher, power banks with USB-A output ports, computer USB ports with sufficient current capacity, and solar USB charging panels rated for 5V output. Avoid using unstable or undersized power supplies, as voltage fluctuations can damage the charger's internal circuits.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy CH4-4P DC5V Universal Four USB Battery Charger Online in India

Purchase the CH4-4P DC5V Universal Four USB Battery Charger online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on CH4-4P DC5V Universal Four USB Battery Charger with fast shipping and expert support.

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