|Model||Volts||1 Hr 1C Rate||Crank Amps
L x W X H (In.)
|ETX680||13.2||12.4||680/320||4.1 lb||6.5 x 3.1 x 6.6|
|ETX680C||13.2||12.4||680/320||3.9 lb||5.9 x 3.4 x 4.5|
|ETX900||13.2||16||840/400||4.9 lb||6.5 x 3.1 x 6.6|
|ETX900-24||26.4||15.6||840/400||8.9 lb||6.5 x 5.1 x 6.6|
|ETX900-VNT||13.2||16||840/400||5.4 lb||6.5 x 3.1 x 6.6|
|ETX1200||13.2||24.8||1200/600||6.9 lb||6.5 x 3.1 x 6.6|
Note: Not FAA Approved. Intended for use in experimental aircraft only.
When quality, performance, and safety matter, EarthX is the most trusted and used brand by experimental aircraft manufacturers and experimental aircraft owners, and endorsed by engine companies such as Rotax, Continental, ULS Power and Viking. Remove weight and increase power, all with one product!
These ETX Hundred series (ETX680C, ETX680, ETX900 and the ETX1200) batteries are recommended for your primary engine aircraft battery. These models are equipped with redundant electronic circuits on the BMS board and have an LED battery fault light indicator to alert you to cell health and state of charge. The battery management features include over discharge protection, over charge protection, short circuit protection up 1000 amps, excessive cranking protection (temperature sensing) in addition to integrated cell balancing technology.
With an EarthX lithium battery, you will gain a significant amount of cranking amps and drop a minimum of 11+ pounds instantly by switching from a lead acid battery.
Please view the Aircraft Application Flowchart under the documents tab for assistance in selecting the correct EarthX battery for your application.
Very light well constructed , comes with terminal bolts.
Replaced two Odyssey PC680 batteries that were unable to turn over my new engine in parallel. The EarthX Batteries didnt just turn it over, they spun the prop and it started on the second try. Saved 26 lbs in the process. Very happy with them.
Very light battery. I pulled out an Odyssey PC 925 and put in a EarthX ETX680C battery. Weight savings about 22 pounds. It came with easy instructions to run a LED warning light to the dash. It also included some small foam pieces for mounting. The biggest surprise was starting the motor. The EarthX arrived at its lowest charge of 13.2 volts. I did not bother to charge it up to full capacity, I just put it in and started the engine and it cranked over faster than the Odyssey battery did when it was full charged!
Works well saved 19 pounds off planes weight.
The above chart lists the battery case as measuring 6.5 x 3.1 x 6.6 - which is smaller than the published Odyssey PC680 dimensions. However the EarthX Battery did not fit the Vans Firewall Forward battery case designed for the Odyssey PC680. It was too thick.
The Earth X Lithium Batteries are not TSO'd and are not designed for certified aircraft.
Per the supplier: These batteries do not have any limitations. You are able to mount these in any direction you would like including upside down.
Per vendor, these batteries can be charged with any charger other than a desulfating charger.
Per Earth X: We recommend either the ETX680 or the ETX900 for the Rotax 912 without external alternator. The ETX 900 is the upgraded version of the 680 but both would work.
Yes, you can connect up to two batteries in series, however they would only be 24 volts, not 28 volts, as each battery is 12 volts.
We believe the "C" stands for Compact. The ETX680C is a smaller battery than the ETX680, but has the same voltage and cranking amps. The case dimensions are listed on the web page.
Per Earth X: Yes, you can connect two Earth X batteries in parallel.
No. The voltages are not the same and you will over charge the lead acid battery and drain the lithium.
ETX680 for normal climate or the ETX900 if they are in a colder climate or just want extra cold cranking amps.