Audiotek AT-905CH 12V 5A Battery Charger Maintainer

The Audiotek AT-905CH is a 12V 5A automatic battery charger and maintainer for compatible lead-acid batteries. It is designed to recharge supported batteries and then monitor them during storage, helping keep vehicles and equipment ready for use. Its compact, weather-resistant format suits automotive, marine, RV, motorcycle, and powersport applications.

This charger is intended for 12V lead-acid, AGM, gel-cell, and deep-cycle battery types. It supports charging for batteries rated from 10Ah to 120Ah, while maintenance charging is specified for batteries up to 200Ah. That range makes it useful for seasonal vehicles, stored boats, lawn equipment, and auxiliary battery systems.

The AT-905CH uses an eight-stage automatic charging process to manage charging and maintenance without constant manual adjustment. Normal, AGM, and reconditioning modes use different charging voltages for compatible battery conditions. Once charging is complete, the unit changes to float monitoring and resumes charging when battery voltage falls.

Its charging performance is focused on controlled, low-maintenance operation rather than high-current rapid charging. LED indicators provide at-a-glance charging, charged, and fault status information. Integrated protective functions help support proper connection and operation around common battery-service issues.

The included quick-disconnect harness provides a practical way to leave a connection installed on a battery for repeat maintenance sessions. Battery clamps offer a temporary connection option, while ring terminals can be used for a more permanent battery lead setup. This makes the AT-905CH a straightforward addition to a storage or preventive-maintenance routine.

Key Features

• 5A Automatic Output: Provides controlled charging for supported 12V batteries.
• Eight-Stage Charging: Manages charging and maintenance automatically through multiple stages.
• Three Voltage Modes: Supports normal, AGM, and reconditioning charging selections.
• Float Monitoring: Maintains a full battery and recharges when needed.
• IP65 Housing: Provides waterproof and dust-resistant protection for routine use.
• Connection Protection: Includes spark-proof and reverse-polarity protection features.

Design & Installation

The AT-905CH uses an IP65-rated waterproof and dust-resistant housing for use around vehicle, marine, and outdoor-equipment battery systems. Its LED status indicators are designed to show charging, charged, and fault conditions clearly. The charger also includes protection against reverse polarity, overcharge, overheating, short circuits, and open circuits.

Connect the included clamps for temporary charging, or install the supplied ring terminals and quick-disconnect harness for repeat access to a battery. Use it only with supported 12V lead-acid, AGM, gel-cell, or deep-cycle batteries within the specified capacity range. Select the appropriate charging mode for the battery type or condition, then connect the charger to a compatible 100–120V AC outlet.