Optimate TM-275 v2 10 amp Battery Charger/Maintainer/Power Supply (12-13.2V Batteries)


This Optimate Lithium charger will quickly charge your battery at 10 amps, maintain it at the optimal voltage, and can be used as a power source of 8 continuous amps! For example, you can use it as power supply while programming your aircraft EFIS so you are not draining your battery while you work.


  • POWER SUPPLY (8 amps at 13.6V by pressing TUNE Button)

What’s included:

  • 1 x TM-275 v2 charger/maintainer/power supply
  • 1 x battery alligator clips
  • 1 x waterproof quick connect lead with ringlets and SAE connector

SKU: TM-275 v2

High efficiency diagnostic charger and tester for LiFePO4 / LFP batteries. 

Perfect for charging of a high performance 12.8V-13.2V LiFePO4 / LFP battery sized from 2.5 to 120 Amp-hour.

Special features: 

* TUNE mode delivers stable power for vehicle system reprogramming, show room vehicle demo or retaining memorized settings when battery cables are disconnected to fit powered accessories or replace the battery.

* BMS reset, pushbutton activated – for batteries with resettable low voltage / deep discharge protection. 

Battery SAVE mode with BMS reset : starts from 0.5V with continuous monitoring / testing of charge acceptance or bad / shorted cell condition. Unnecessary (and unsafe) charging of a bad battery is prevented.

* safeTº : Automatic charge rate adjustment to ambient temperature sensed at the charger. Reduced charging below freezing, no charging if temperature is below -20ºC/-4ºF (can damage lithium batteries).

* Ampmatic : Microprocessor adjusts current to ideal LiFePO4 charge curve to match battery size / conditionfor fastest and most complete charge.

SAVE : Low Volt Start of 0.5V + 3-step low volt SAVE and TEST

  • Recommended for LiFePO4 batteries: up to 120Ah
  • Operation: Fully automatic
  • Charging amps: 9.5
  • Charging volts: 12.8V (nominal) 0.5V – 14.4V (range)
  • Charge time limit: 24 hours (maintenance time: unlimited)
  • Maintain/test cycles: 30 min/30 min (alternating hourly)
  • Safe: 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
  • Style: Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector
  • Operation temperature range: -40°C – +40°C
  • Warranty: 3 years