1. Introduction
The Tecmate Optimate Lithium 4s 10A (TM275v2) is an advanced 10-step battery saving charger, tester, and maintainer specifically designed for 12.8V/13.2V LiFePO4 (Lithium Ferrous Phosphate) batteries. This high-performance unit provides ultimate protection for your battery, featuring a BMS (Battery Management System) wake-up mode and a TUNE mode for stable battery support during vehicle ECU programming.
Image: The Optimate Lithium 4s 10A (TM275v2) battery charger with included accessories.
2. What's in the Box
Your Tecmate Optimate Lithium 4s 10A (TM275v2) package includes the following items:
- Sealed Battery Saving Charger & Maintainer
- Weatherproof Battery Lead (with M8 / 5/16" - M10 / 3/8" ringlets)
- Battery Clip Set
Image: Visual representation of the items included in the product packaging.
3. Setup
Follow these steps to correctly set up your Optimate Lithium charger:
- Connect to AC Power: Plug the charger into a standard 100-240V AC power outlet. Lamp 1 (green) will illuminate, indicating the charger is receiving power.
- Connect to Battery: Attach the battery lead or clips to your 12.8V/13.2V LiFePO4 battery. Ensure correct polarity: red to the positive (+) terminal and black to the negative (-) terminal. If connected incorrectly, Lamp 2 (red) will light up, indicating reverse polarity. Correct the connection for charging to proceed.
Image: The Optimate Lithium charger connected to a battery using the included clips.
4. Operating Instructions
The Optimate Lithium charger features a 10-step charging and maintenance program. The LED indicators on the charger provide real-time status updates:
- Lamp 1 (Green): Indicates AC power connection.
- Lamp 2 (Red): Indicates reverse polarity connection. Correct immediately.
- Lamp 3 (Orange/Red): Lights up when connected to a discharged battery (retaining at least 0.5V) or indicates BMS pulse reset.
- Lamp 4 (Yellow): Lights up when charging has progressed from save mode, or the battery is at least 50% charged.
- Lamp 5 (Green): Lights up when the battery has reached full charge and is healthy.
- Lamp 6 (Red): Blinks if a fault is detected within the battery during save mode, or if the battery cannot hold sufficient charge during the final test, or if current draw from the vehicle is higher than the charger can deliver.
BMS (Battery Management System) Reset
Lithium batteries with an advanced BMS may enter a protected sleep mode if deeply discharged. The Optimate Lithium charger can safely wake up these batteries.
Image: The Optimate Lithium charger's ability to save deeply discharged batteries or manually reset the BMS.
Video: Demonstration of the BMS reset function on an Optimate charger, showing how to reactivate a deeply discharged lithium battery. This video is for a similar Optimate model (Optimate4) but illustrates the core BMS reset concept.
TUNE Mode
The TUNE mode provides stable battery support during ECU programming or diagnostic work, ensuring consistent power delivery to sensitive vehicle electronics.
Image: The TUNE mode protects a vehicle's battery when adjusting settings or updating software, providing a stable power supply.
5. Maintenance
The Optimate Lithium charger offers a 24/7 interactive maintenance program. Once the battery is fully charged and tested as healthy, the charger monitors the battery's charge level and delivers a maintenance charge only when necessary. This ensures the battery remains charged and healthy, even during long periods of storage.
Image: The Optimate Lithium charger providing safe, interactive 24/7 maintenance, allowing users to connect and forget.
6. Troubleshooting
If Lamp 6 (red) blinks, it indicates a potential issue:
- Faulty Battery: The charger detected a fault within the battery during the save mode. The battery may be permanently damaged.
- Unable to Hold Charge: The battery could not hold sufficient charge during the final test.
- High Current Draw: The current draw from the vehicle is higher than the charger can deliver. Disconnect the vehicle's electrical system or reduce parasitic drains.
If the issue persists, consult a professional or contact Tecmate customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Manufacturer | TecMATE |
| Model | TM-275v2 |
| Output Voltage | 12.8 Volts |
| Item Weight | 3.1 pounds (1.41 Kilograms) |
| Product Dimensions | 9.25 x 4.88 x 2.6 inches |
| Specification Met | CE |
8. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your product or visit the official Tecmate website. Ensure you have your model number (TM-275v2) and purchase details available when contacting support.
