HTRC H4AC 20W Compact Balance Charger
HTRC H4AC 20W Compact Balance Charger
HTRC H4AC 20W Compact Balance Charger
The HTRC H4AC is a professional-grade 20W compact balance charger designed for lithium polymer (LiPo), lithium-ion (Li-ion), and nickel-metal hydride (NiMH) battery packs with 1-4S cell configurations. This charger is widely used by RC hobbyists, drone pilots, and professional electronics technicians who require precise cell balancing and fast charging capabilities in a portable form factor. It solves the critical problem of battery cell imbalance, which reduces battery lifespan and performance while preventing dangerous overcharging conditions that can cause thermal runaway or battery failure.
Product Overview
The HTRC H4AC operates on a dual-channel architecture that enables simultaneous charging of two independent battery packs or sequential charging with automatic cell balancing. The charger utilizes active balancing technology that monitors individual cell voltages in real-time and redistributes charge between cells to achieve perfect equilibrium, ensuring all cells reach identical voltages before charging completion. This prevents the common issue of cell overvoltage where the fastest-charging cell reaches maximum voltage while slower cells remain undercharged, which degrades battery performance and safety. The 20W power output is intelligently distributed between channels, allowing users to charge two 2S batteries simultaneously or one 4S battery at full 20W capacity.
The H4AC features a compact desktop design with an integrated LCD display that shows real-time charging current, voltage, cell balance status, and remaining charge time. The charger includes multiple safety protocols including over-current protection, over-voltage protection, reverse polarity protection, and temperature monitoring to prevent charging in extreme conditions. The universal input accepts both AC mains (100-240V) and DC power supplies, making it suitable for field operations, workshop environments, and international travel. The durable aluminum chassis with integrated cooling ensures thermal stability during extended charging sessions.
Key Specifications
| Specification | Details |
| Product Type | Compact Balance Charger |
| Brand | HTRC |
| Origin | Original/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 |
| Power Output | 20W maximum |
| Battery Chemistry Support | LiPo, Li-ion, NiMH, NiCd |
| Cell Configuration | 1-4S (1-4 cell series) |
| Charging Channels | 2 independent channels |
| Input Voltage | AC 100-240V or DC 11-18V |
| Display | LCD screen with real-time monitoring |
Key Features
- Dual-channel simultaneous charging allows parallel charging of two battery packs or sequential charging with automatic cell balancing protocols for optimal battery health
- Active cell balancing technology monitors individual cell voltages with 50mV precision and redistributes charge to prevent cell overvoltage and extend battery cycle life by 30-40 percent
- Compact form factor measuring 150x100x50mm weighs only 280 grams, making it portable for field operations, RC events, and drone racing competitions without sacrificing charging speed
- Multi-chemistry support including LiPo, Li-ion, NiMH, and NiCd batteries with automatic detection and protocol adjustment eliminates need for manual chemistry selection
- Comprehensive safety protection including over-current limiting, over-voltage cutoff, reverse polarity detection, and thermal shutdown prevents battery damage and fire hazards
- Universal input voltage compatibility accepts both AC mains 100-240V and DC 11-18V sources for maximum operational flexibility across different power environments
Applications and Use Cases
- RC aircraft and quadcopter operations where LiPo battery packs require precise cell balancing before each flight to ensure consistent performance and prevent mid-flight power loss
- Professional drone racing where multiple high-discharge LiPo batteries must be charged and balanced between races within tight time windows to maintain competitive readiness
- Hobby electronics projects involving portable power systems where NiMH or Li-ion batteries need reliable charging with cell monitoring to prevent overcharge conditions
- Field service technicians and electronics repair professionals who need portable charging capability for customer battery packs with real-time diagnostics and safety verification
- Educational robotics programs where students learn battery management principles through hands-on experience with multi-chemistry support and visual feedback of charging processes
How to Use
Begin by connecting the HTRC H4AC to a suitable power source: AC mains via the included power adapter or a DC supply between 11-18V. Allow 30 seconds for the charger to initialize and display the main menu on the LCD screen. Select your battery chemistry using the navigation buttons—the charger will auto-detect LiPo, Li-ion, NiMH, or NiCd configurations. Connect your battery pack to the appropriate balance connector and main discharge connector, ensuring correct polarity alignment. The charger will automatically detect the cell count (1-4S) and display it on the screen. Set your desired charging current using the adjustment buttons, typically 1-2A for safe charging or up to 10A per channel for faster charging of larger capacity batteries.
Once settings are confirmed, press the start button to initiate charging. The LCD display will show real-time charging current, voltage per cell, and estimated time to completion. The charger continuously monitors cell voltages during charging and automatically adjusts current distribution to balance cells. When all cells reach target voltage and are perfectly balanced, the charger will emit an audible alert and display a completion message. Allow the battery to cool for 5-10 minutes before disconnecting. For dual-channel operation, repeat the process for the second channel. Always inspect battery connectors for corrosion before charging and ensure proper ventilation around the charger during operation to maintain thermal stability.
Frequently Asked Questions
What is the difference between balance charging and regular charging?
Regular charging supplies current to the entire battery pack as a single unit, which can result in individual cells reaching different voltages due to internal resistance variations. Balance charging monitors each cell individually through the balance connector and adjusts current distribution to ensure all cells charge to identical voltages simultaneously. This prevents cell overvoltage, extends battery lifespan by 30-40 percent, maintains consistent power output, and improves safety by preventing thermal runaway conditions. The HTRC H4AC uses active balancing which continuously redistributes charge between cells during the charging process rather than passive balancing which only corrects imbalances at the end.
Can I charge different battery types simultaneously on both channels?
Yes, the HTRC H4AC features independent dual channels that can operate simultaneously with different battery chemistries and cell counts. You can charge a 3S LiPo battery on channel 1 and a 2S Li-ion battery on channel 2 at the same time. The charger automatically detects the chemistry and cell configuration for each channel independently. However, the 20W total power output will be distributed between channels, so simultaneous charging will reduce the charging current for each battery compared to single-channel operation. For optimal charging speed, charge one battery at a time to utilize the full 20W capacity on a single channel.
How do I know if my battery pack is damaged or unbalanced?
The HTRC H4AC provides several diagnostic indicators on its LCD display. If individual cell voltages differ by more than 50mV before charging begins, the battery pack is significantly unbalanced and may indicate internal damage or cell degradation. During charging, if the charger takes significantly longer than normal to complete or if one cell charges much faster than others, this indicates potential cell damage. If the charger displays an error code or shuts down during charging, disconnect immediately as this indicates a serious fault. Healthy LiPo cells should show 3.0V per cell when fully discharged and 4.2V when fully charged, with no more than 20mV variation between cells after balancing.
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.
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- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
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