The difference between the ETX680 and the ETX680C is physical size. The "C" is for compact."
The EarthX Lithium batteries (LiFePO4) are designed to be a light-weight, maintenance free replacement of your standard lead-acid battery.
These batteries will work with any vehicle charging system and "modern" lead-acid battery chargers, thanks to the exclusive built-in electronics (Battery Management System, BMS).
No other motorsport lithium battery manufacturer offers a battery with built-in electronics to protect it from over-discharging, over-charging, plus keep the cell's charge level balanced.
Engineered and assembled in the U.S.A.
|Nominal Voltage||13.2 Volt|
|Ah (1 Hour Discharge Rate)||12.4 Ah (1C Rate)|
|Pulse Crank Amps (PCA)||680A (3 seconds @ 45°C voltage > 9V)|
|Cold Cranking Amps (CCA)||320A (modified SAE test, 3 seconds @ 0°F, voltage > 7.2 Volt)|
|Max Continuous Discharge Amps||100A|
|Standard Charge Voltage||13.9 - 14.6 Volt|
|Maximum Charge Voltage||15 Volt|
|Recommended Charger / Maintainer Amps||0.8 - 15A|
|Max Charge Amps||60A (from vehicle charging system)|
|Life (Charge cycles, 80% depth of discharge)||4000 cycles @ 1C discharge rate 25°C|
2000 cycles @ 10C discharge rate 25°C
|Life (Years)||8 Years|
|Environmental Rating (Resistance to water intrusion)||IP 66 (wash down with a high pressure washer)|
|Operating Temperature||-30°C to +60°C|
|Storage Temperature||-40°C to +70°C|
This table shows the most common fault conditions and possible causes.
|LED Light||Voltage||Possible Cause||Recommended Action|
|Slow Flashing (5s on / 5s off)||Less than 12.8V||Battery over-discharged (due to faulty charging system)||Charge battery. Once charged, the light will stop flashing.|
|Slow Flashing (5s on / 5s off)||Less than 13.2V||Weak or failing cell||Charge battery. If voltage drops below 13.2V within a few days, discontinue use.|
|Slow Flashing (5s on / 5s off) (>1 hour time period)||13.2V - 14.6V||Weak or failing cell||Discontinue use. If in flight, this is not an immediate issue unless it is in conjunction with a charging system failure.|
|Slow Flashing (5s on / 5s off)||Greater than 15.2V||Over-charging (due to faulty charging system)||If in flight, shutoff charging system immediately. Aircraft over-voltage protection is required if alternator charging system is greater than 20 amps (i.e. over voltage crowbar circuit)|
|Slow Flashing (5s on / 5s off)||13.2V - 14.6V||Cell to cell charge levels are not balanced||May come on briefly during periods of high current charging until the cells are automatically balanced. Try charging with a plugin charger, like an Optimate Lithium charger.|
|Solid Light||Any voltage||BMS electronic issue||Discontinue use. If in flight, this is not an immediate issue unless it is in conjunction with a charging system failure.|
|Solid Light that turns off after 3 minutes||Any voltage||Short Circuit protection was activated||Nothing neds to be done.|
|Short Flashing (2s on / 2s off)||Any voltage||High battery temperature (> 65°C / 150°F)||Let battery cool down prior to cranking or charging.|
The EarthX ETX680C was my choice for an aircraft application, but when I took the battery from the shipping box and rotated it in my hands, it went "thud" within it's own case. Something substantial was free to move inside the battery case, not withstanding the fact that the terminal voltage tested normal full charge. I contacted EarthX via their email portal and got a response within 30 minutes !! They shipped a replacement the same day. The new battery, without a "thud", was in my hands 2 days later, along with a prepaid return shipping label for the "thud" unit.
Customer service doesn't get any better than that.
I HAD ANOTHER (BRAND) LITHIUM BATTERY FOR 6 YEARS TIL IT DIED BUT IT NEVER TURNED THE ROTAX912S LIKE THIS EARTHX 680C DOES. LOOKS LIKE A GREAT BATTERY AND ESPECIALLY THE FACT THAT IT HAS AN INDICATOR LIGHT THAT GIVE ONE AN INDICATION OF BATTERY TROUBLE. I MOUNTED THE INDICATOR LIGHT IN A SPOT THAT I WILL NOT MISS IT IF SOMETHING DOES GO WRONG. I DON'T EXPECT A PROBLEM BUT IT'S NICE TO HAVE A BACK UP SYSTEM. TELL YOU HAW THINGS GO IN 8 YEARS WHICH IS THE POSSIBLE LIFE OF THE BATTERY.
I purchased the Earth X battery to replace 2 Odyssey batteries I had for my Lycoming O320. The battery arrived in very secure and padded box with in 7 days of order. The battery is extremely light and my weight went from 30Lbs down to 4Lbs! This has helped my weight and balance dramatically. The engine cranks over much faster than with 2 Odyssey batteries and the alternator refreshes the battery to full charge with in minutes of run time. The extra crank power is very noticeable. We will see how long this battery lasts but based on history from others, I expect much longer use than with a lead acid battery.