YONHAN 12V/24V Adjustable Battery Charger 0–15A — Smart Maintainer with Pulse Repair & Supply Mode

YONHAN's 0–15A 12V/24V adjustable battery charger is a smart all-in-one charger, maintainer and power supply designed to charge, revive and maintain most vehicle batteries safely.

Whether you service cars, motorcycles, RVs or marine craft, this compact charger adapts current and charging modes to match battery size and chemistry. It combines adjustable output, a supply mode for deeply discharged batteries, pulse repair for sulfation mitigation, and a multi-stage maintenance routine so batteries stay ready without overcharging. The unit supports a broad list of chemistries and provides protections that make it suitable for workshop use or home garage storage.

How does YONHAN handle different battery sizes and chemistries?

The YONHAN charger provides selectable voltages (12V/24V) and an adjustable current range from 0.5A up to 15A so you can match charge rate to battery capacity and vehicle type. It recognizes and supports common chemistries to ensure appropriate charging profiles for each battery.

• 0.5A for small batteries like motorcycles and powersports.
• 5–10A for typical passenger car batteries.
• Up to 15A for large batteries in trucks, RVs and deep-cycle applications.
• Compatible with LiFePO4, AGM, GEL, EFB, Wet, MF, STD and deep-cycle batteries.

What does SUPPLY mode do and when should I use it?

SUPPLY mode lets the unit act as a steady 12V DC power source when a battery is completely discharged or during diagnostics and battery swaps. Use it to power electronics while replacing batteries or to recover batteries that other chargers cannot detect.

• Recovers batteries discharged down to 0 volts in many cases.
• Provides stable 12V power for vehicle diagnostics or accessory testing.
• Useful during battery replacement to avoid losing stored settings or codes.

Can this charger revive older or sulfated batteries?

The unit includes pulse repair technology that applies specialized pulses to help break down sulfation and restore some lost capacity in neglected batteries. While it can improve many aging batteries, results vary with the level of internal damage and age.

• Pulse repair targets sulfation buildup to improve charging acceptance.
• May enhance engine starts and delay the need for immediate replacement.
• Best used as part of regular maintenance rather than a guaranteed cure for failing cells.

Is YONHAN safe to leave connected for long-term maintenance?

Yes — the charger doubles as a smart trickle charger and maintainer with a multi-stage program that prevents overcharge and compensates for temperature changes. Built-in protections reduce risk of reverse polarity, short circuits and overheating during extended use.

• 10-stage charging routine transitions from bulk to float/maintenance.
• Reverse polarity and short-circuit protection for safe connections.
• Temperature compensation to adjust charging under variable conditions.

Who this is for: The YONHAN 0–15A adjustable charger is aimed at vehicle owners, small fleet operators, RV and boat enthusiasts, and garage technicians who need a single versatile unit for charging, diagnosing and maintaining multiple battery types. It’s particularly useful for those who want a charger that adapts to both tiny powersports batteries and larger deep-cycle or starter batteries while offering recovery and maintenance features that extend battery life and reliability.