Garages Without Power
Maintain stored batteries where AC electricity is unavailable.
TecMate USA
OptiMate DC-DUO
DC-DC Lead-Acid & Lithium Battery Charger & Maintainer
SOLAR/OFF-Grid Series · Model TM500v3
Keep your motorcycle or equipment battery ready without an AC outlet. Charge, test and maintain compatible lead-acid and LiFePO4 lithium batteries using power from another battery.
- Charges and maintains compatible lead-acid and LiFePO4 lithium batteries
- Supports flooded, AGM and GEL lead-acid battery types
- Keeps your battery ready between rides and outings
- Provides automatic long-term maintenance during seasonal storage
Will it work with my battery?For the battery voltages and types listed above only. Not for other lithium chemistries. On chargers with selectable programs, choose the correct battery type before charging.
Price $109.95
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4.5 / 5.0 · 31 reviews
3-year limited replacement warranty
Is this the right product for you?
Cars, Motorcycles, & Powersports
Recharge compatible batteries between outings using a charged source battery
Remote Equipment
Care for compatible batteries away from mains power.
What’s included?
- OptiMate DC-DUO battery charger
- x2 Battery clamps
- Fused M6-M8 eyelet leadFor a connection you can leave installed
- Instruction Manual
Key specifications
- Battery voltage
- 12V lead-acid / 12.8V–13.2V lithium
- Charging current
- 2A
- Battery types
- Lead-acid (STD flooded, AGM and GEL) & LiFePO4 (LFP) lithium
- Battery capacity
- From 6Ah
- Operation
- Fully automatic DC-powered recovery, charging, testing and maintenance
- Warranty
- 3-year limited replacement warranty
How do I use it?
Connect the source battery
Attach the fused clips to the short input lead and a suitable charged source battery.
Connect the battery needing charge
Connect the output using the standard clips or installed battery lead.
Charge and maintain
The charger will automatically charge and test your battery, then switch to maintenance to keep it ready between rides.
Before you buy
Do I need a wall outlet?
No. It runs from a suitable source battery.
How large should my source battery be?
Ideally, at least 1.5 times the capacity of the battery being charged.
Will it completely drain the source battery?
Built-in protection stops charging when source voltage becomes too low.