The OptiMATE TM391 is a 12.8v 5.6 amp lithium smart charger. The TM391 is meant for Lithium LFP/LiFEPO4 batteries between 3 AH and 72 AH, often found in motorcycles, ATVs, Side-by-Sides (UTVs), go-carts, and automobiles.
The TM391 is meant to charge 4-cell lithium batteries with a nominal voltage of 12.8v. Some battery manufacturers may list their batteries with a different voltage rating, such as 12v Lithium, 12.8v, or 13.2v batteries. They may also only list the battery as a lithium or lithium-ion battery. Ultimately, the TM431 is safe for lithium batteries meant to start a 12v vehicle system.
The OptiMATE TM391 features an advanced 10-step charging profile capable of recovering deep-discharged batteries as low as 0.5 volts! A great part of this 10-step charging is that it automatically adjusts the charging current to suit the battery's size, so a big battery will get more current, and a smaller one will get less.
The TM391 can also detect the battery’s state of health and warn you when damage is detected, such as a bad cell. It features 24/7 maintenance charging, only delivering a charge when necessary. While on standby during the maintenance step, it only uses 0.5 watts, making it a low-energy-consuming charger.
The OptiMATE TM391 features a BMS Reset / Tune button that offers several features. For advanced lithium batteries, it can reset an advanced lithium’s BMS to allow charging. It can wake up a new battery delivered in sleep mode. Lastly, it can be used to activate the Tune mode, which supports a battery while the application is being tuned without the engine running. The Tune mode will effectively slow down the battery’s discharge rate, giving you more time to tune or troubleshoot the application.
- Ideal for 4-Cell Lithium LFP/LiFePO4.
- Suitable 3-72 AH Batteries.
- Saves low voltage LiFePO4 batteries
- BMS Reset / Tune Button Feature!
- Has a Temperature rating down to -40°F!
- Low Volt Start of 0.5 V + 3 step low volt save & test.
- Weatherproof case with wall mounts, with 6 ft AC supply lead and 6 ft charge lead ending in SAE connector.
- IP-54 Sealed Weatherproof Case
- Includes a ring connectors harness & standard battery clips
- 3 Year Warranty