OptiMate DC-DUO : OFF-GRID series 12V 2A DC-DC lead-acid & lithium battery charger & maintainer

The OptiMate DC-DUO (model TM500v3) fully sealed automatic battery charger delivers 2 Amps of charge to the battery of your modern motorcycle, ATV, car, boat or bakkie, from another 12V battery or 10 to 16V DC source. Its fully automatic plug-and-play design and smart DUO technology means all you must do is connect it to your vehicle’s battery and the OptiMate DC-DUO automatically adapts to the battery type and size, brings it to full charge and then OptiMate’s proven 24-7 ‘connect & forget’ safe care makes sure your vehicle’s battery remains ready.

DUO : smart battery sensing technology that automatically adapts to any type of 12V lead-acid (Pb) battery, as well as to the 12.8V/13.2V lithium (LFP/LiFePO4) battery in your motorcycle or sports-car. 

EASY : no buttons, no guesswork – just connect and the smart 6-step program does the rest automatically!

SAFE: Smart electronics protects against accidental reverse polarity connection on input (source) and output (target). No sparks if clamps touch as the output (for target battery) stays off until it is connected to a battery with voltage of 4V or higher on output and input stays off if source battery voltage is below 10.5V.

LOW VOLT START: Will charge a battery from as low as 4V. Pulse recovery that is safe for vehicle electronics.

SMART CHARGE: With 2 amps of constant current this intelligent charger recovers, charges, and maintains your battery 24/7 — ensuring longer battery life, maximum performance, and trouble-free starts.

POWER-SAVE TECHNOLOGY: High efficiency forward converter power conversion and smart power management preserves the source battery's power. Standby power usage (during long term maintenance) is less than 0.5W as it monitors the target battery's charge level and only provides a top up charge when needed. If source battery's voltage drops below 12V the maximum charge current reduces to 1 Amp.

More features:

• Charge current - 2 Amps constant current.
• Source supply range - 11V to 16V DC.
• Source battery protection - Reduces charge current to 1 Amp and turns on low source LED warning when voltage drops below 12V. Turns off if source battery drops below 10.5V.
• Universal 12V lead-acid Battery Compatibility – Works with STD / flooded / wet-cell with removable filler caps (for adding distilled water) and sealed/maintenance free EFB (Enhanced Flooded Battery) & AGM (Absorbent Glass Mat).
• Lithium LFP/LiFePO4 12.8V/13.2V** Battery Compatibility – Automatically adapts DUO charging algorithm if Lithium LFP battery is sensed, including low voltage recovery and Lithium friendly 24-7 maintenance. Lithium batteries don't need continuous maintenance charging, OptiMate DUO monitors the battery hourly and if it needs charge (below 70%) it brings it back up to 90% for extended life. (Lithium battery capacity and life reduces if kept at 100% when not used). ** nominal voltage is 12.8V (4 x 3.2V), but some battery brands claim 13.2V (4 x 3.3V).
• Safe for Sensitive Electronics – No overcharging, spark-suppressed and short-circuit protected.
• Eco-Friendly & Weatherproof – For indoor or outdoor use, even in extreme cold (–40°C) or heat (40°C).
• Plug & Play – Includes 2 sets of battery clamps for quick connect to source and target batteries, and a fused battery lead with M6-8 dual size ringlets that can be permanently fitted to a battery.
• Connect & Forget - Fully automatic time limited charging followed by 24-7 smart adaptable OptiMate DUO (Pb / LFP) maintenance.
• (Technical specifications PDF)

What’s in the Box

• OptiMate DC-DUO (model TM500v3) 12V 2A fully sealed battery charger.
• O-04 Battery clamp set x 2
• O-01 fused battery lead with M6-M8 dual size ringlets.
• Instruction manual
• 3-year replacement warranty