Now, we connected the battery to a 3000W (peak) pure sine wave inverter and to the inverter,we connected twoheaters as loadand set a current draw close to 20A (19.6A) as this is equal to 0.2C. We hooked up a battery tester with a shunt to monitor the battery parameters. The battery voltage was around 13.3V and with a load drawing 19.6A, the total power draw (combination of heater and the inverter) was roughly 260W.

The over-discharge protection of the BMS kicked in and shutoff the output when the battery voltage fell to 10.3V even though the specifications say discharge cutoff voltage as 10V. The battery tester showed the capacity as 99.04Ah and total energy as 1268Wh. This is just 1% less than the rated capacity of the battery, which is acceptable.

Now, we charged the battery using the 20A lithium battery charger. It took almost 5-1/2 hours to fully charge the battery. The open circuit voltage of a fully-charged battery was 14.3V.

We once again performed a discharge test but this time, we set the discharge current to about 40A (for a 0.4C discharge) by connecting a bunch of heaters and blower fans. The total power draw from the battery was roughly 524W.Even this time, the capacity reported by the battery tester came at 99.08Ah, which is similar to the previous test.

If you look at the specifications of the GOLDENMATE12V 100Ah LiFePO4 Lithium Battery, it says the charge temperature range is 0°C to 50°C, the discharge temperature range is -20°C to 60°C and the storage temperature range is 0°C to 45°C. While exploring the guts of this battery, we noticed two temperature sensors and thought one is for overheat protection and the other is for low temperature protection.

To test this, we connected the charger and while the battery is charging, we sprayed some freeze spray on the tip of the temperature sensor to instantly reduce the temperature of the sensor. As expected, the BMS shutoff the charging instantly. Very nice to see low temperature protection being implemented in “new” brands.

An important point to remember about the GOLDENMATE12V 100Ah LiFePO4 Lithium Battery is it is not a SLI Battery or Starter Battery. So, if your intensions are to replace your car battery with this, then it will not work.