TM-500 OptiMate DC-DUO

  • $117
  • Save $13

OFF-GRID series: 6-step 12V/12.8V 2A sealed DC to DC battery saving charger & maintainer

IDEAL FOR:  STD, AGM & GEL 12V batteries from 6Ah and LiFePO4 (LFP) 12.8V/13.2V batteries from 2Ah.

CHARGING AMPS: 2A (constant current)

CHARGING VOLTS: nominal: 12V & 12.8V range: 2V – 14.4V

OPERATION:  Fully automatic


FEATURES: CHARGE YOUR 12V (Lead Acid) or 12.8V- 13.2V (LFP-Lithium) BATTERY FROM ANOTHER 12V BATTERY! NO AC POWER REQUIRED. Ideal for both lead-acid and LFP (LiFePO4) batteries.

USE: Indoor (lowest temperature: -4°F / -20°C).

INPUT : 12-16 V, 2.7A max. With source battery protection > low battery warning light and automatic shut-down.

STYLE: Weatherproof case with wall mounts, with 1ft / 30cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector.

SAVE : Low Volt Start of 2V

SAFE: Input electrically isolated from output. No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected.

INCLUDED: Fused battery clip set, standard battery clip set & weatherproof battery lead.

WARRANTY: 3-year limited replacement warranty.


How it works: As simple as 1-2-3!

Attach the fused clip set to the short input cable (side marked 12 – 16V) and then connect the OptiMate DC to DC to a charged source battery e.g. your vehicle’s 12V battery.  The OptiMate DC to DC’s SAVE and CHARGE LEDs will blink together for 1 minute, indicating it is ready to charge a battery.

Within 1 minute* connect the output charge lead to the battery requiring charge, using the standard clip set or connect directly to the battery that may have the weatherproof battery lead already pre-wired. Charging proceeds when the SAVE or CHARGE LED turn full on.    *After 1 minute the OptiMate DC to DC turns off if not connected to the battery that needs charging. To re-start, disconnect from the source battery and then once again reconnect.

Wait until the green TEST LED blinks. ‘First Aid’ charging has been completed! Leave the charger connected for ‘365’ long term maintenance.

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