AIYONFEI 15A Smart Car Battery Charger 12V/24V — 9-Stage Fast Charge & Repair, LED Display

The AIYONFEI 15-Amp smart charger is a fully automatic 12V/24V battery charger and maintainer that fast-charges, conditions, and safely maintains lead-acid and LiFePO4 battery types with a 9-stage intelligent program.

This compact, plug-in charger combines rapid 15A (12V) or 8A (24V) charging with a multi-stage charging algorithm and temperature-adaptive modes so you can top up, revive, and preserve vehicle batteries without switching devices. It's designed to fit a wide variety of batteries — from car and truck starter batteries to deep-cycle and LiFePO4 packs — and includes a clear LED display so you can monitor voltage, current, and charge state at a glance.

How quickly will this charger bring a dead battery back to usable charge?

The 15A output delivers noticeably faster recharge than typical 10A chargers, making it suitable for 2Ah–150Ah 12V batteries. The 9-stage program optimizes current and voltage through bulk, absorption, and float stages to charge efficiently while protecting battery life.

• 12V: up to 15 amps for fast bulk charging
• 24V: up to 8 amps for larger battery banks
• 9-stage routine: testing, desulfation, charge phases, repair, float
• Remembers last selected mode after a power interruption

Can this charger restore an old or sulfated battery?

Yes — it includes a repair/maintenance setting that applies pulse and frequency techniques intended to reduce sulfation and revive weak batteries. However, it cannot reactivate batteries that are fully depleted to 0V or unsupported lithium chemistries.

• Maintenance mode uses pulse repair technology
• Minimum detection threshold: 0.3V required to initiate repair
• Not compatible with NCM/NCA, LCO, LMO, or LTO lithium types
• Displays battery test and repair progress on the LED screen

Is it safe to use in cold or hot weather?

The unit automatically adapts charging voltage for winter and summer conditions so the battery sees an appropriate charge profile. Built-in protections guard against overcurrent, reverse polarity, overheating, overcharge, and short circuits while the charger monitors temperature to adjust performance.

• Automatic winter/summer voltage adjustment
• Cooling system and fire-resistant materials for safety
• Overcurrent, reverse, and short-circuit protections
• LED shows real-time temperature-influenced charging status

How do I use trickle or long-term maintenance settings?

For slow, long-term topping-up use the trickle option (labeled "Motorcycle" mode) to maintain a battery at full charge without overcharging. Note that Trickle and TKL modes are not suitable for LiFePO4; always select the correct battery type on the charger before starting.

• Trickle mode keeps charge level for storage or seasonal vehicles
• Dedicated modes for AGM, GEL, STD, EFB, SLA, and LiFePO4
• Input cord 180cm and output cable 90cm for flexible placement
• Charger will not start if battery icon shows empty (no battery detected)

Who this charger is for: AIYONFEI's 15A smart charger suits vehicle owners, mechanics, fleet managers, and hobbyists who need one versatile unit for varied battery types — cars, trucks, ATVs, motorcycles, boats, tractors, golf carts, and deep-cycle applications. Choose this model when you want faster charging than basic maintainers, advanced maintenance/repair options, and adaptive temperature control for year-round use. Refer to the user manual for chemistry limits and contact AIYONFEI support for help with setup or troubleshooting.