OPTIMA D400+ 12V Battery Maintainer & Charger — Digital, Safe, Versatile

Overview

Meet the OPTIMA D400+ 12V Performance Battery Maintainer and Charger, a compact yet capable companion designed to keep a wide range of batteries ready for action. Whether you’re working with OPTIMA AGM, Lithium, traditional 12V auto/marine, powersport lead-acid, or flooded packs, this device adapts to your needs with ease and care. Its thoughtful design combines safety, clarity, and efficiency to help you manage charging without guesswork.

Smart charging for multiple battery chemistries

The D400+ features a digital battery type selector that lets you switch between battery types with a simple touch. This versatility supports OPTIMA AGM, OPTIMA Li, auto/marine, and power-sport lead-acid batteries, making one charger suitable for many vehicles and projects.

• Digital selector adapts to AGM, Lithium, Auto/Marine, and Power Sport Lead Acid packs
• Ideal for cars, boats, powersport machines, and seasonal storage cycles

Clear diagnostics at a glance

A four-color LED status bar provides at-a-glance feedback on the charger’s stage, while an illuminated LCD screen delivers precise values. Expect visible indicators for analysis, charging progress, conditioning, and automatic maintain modes.

• LED status bar signals Analyze, Charging, Conditioning, and Auto Maintain
• LCD readouts show state of charge, voltage, and charging current

Safe, smarter storage and maintenance

Pre-charge awareness helps you gauge battery voltage before charging, reducing risk. An integrated energy saver mode supports short-term and long-term storage, while spark-free connections, reverse polarity protection, and over-temperature safeguards prioritize user safety and battery health.

• Pre-Charge Status Gauge helps prevent unsafe charging conditions
• Energy Saver Auto Maintain mode protects batteries during storage
• Spark-free connections plus reverse polarity and over-temp protection

All-in-one package for quick setup

With a robust 4-amp peak charging current and a complete kit, you’ll have everything you need to charge and maintain a range of batteries right out of the box. The package includes clamps, a ring terminal, and OPTIMA POWERLINK connections for straightforward setup.

• 4 A peak charging current for fast, safe top-ups
• Includes clamps, ring terminal, and POWERLINK cables

Real-world use, real convenience

Whether you’re prepping a seasonal boat, keeping a daily driver ready, or maintaining a powersport machine between rides, the D400+ aims to simplify battery care with clear information and dependable performance. It’s designed to be your reliable power companion without promising guarantees, simply offering a practical path to better battery readiness.