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Features
Extra Batteries for Xen and Xeo
The Liquivision Xen and Xeo use ER14335M lithium 3.6V batteries. Only ER14335M batteries are authorized for use with your Xen or Xeo. ER14335 batteries (no M) are NOT compatible. Only the batteries contained in Liquivision battery packs can be guaranteed to perform to Liquivision standards.
We strongly recommend always having a spare battery on hand, since spare batteries have a long shelf life and do not require any special storage environment (just dry and away from direct sunlight or heat).
Spare batteries are sold as follows:
Battery 1-Pack
* 1 ER14335M battery
* 1 spare O-ring
Dealers can buy 10 Battery 1-Packs for a discounted price.
Battery 3-Pack
* 3 ER 14335M battery
* 3 spare O-rings
* 1 resealable tube of O-ring lubricant
Dealers can buy 5 Battery 3-Packs for a discounted price.
O-rings
You should inspect your battery cap O-ring with every battery change. Check for cracking, damage or dirt. If you choose to replace your O-ring, always make sure to clean the battery cap properly to remove any residue that may prevent a good seal and to lubricate the new O-ring with silicone O-ring lubricant.
To order spare batteries for your Xen or Xeo, please contact your local Liquivision dealer.
We also require that you read the battery change procedure in the Xen Manual or view the Battery Change Video before changing your battery, as battery compartment flooding and possible resulting Xen or Xeo unit damage is not covered by the Warranty. If you have any hesitations about changing the battery yourself, you can ask your Dealer to do so for you.
Important Notices on Battery Life
The ER14335M Xen/Xeo batteries can provide up to 90 hours of dive time with your unit*, although 25-40 hours is more typical if you use the standard Liquivision color scheme on medium brightness and all the dives are done within a month of first using the battery.
Battery life is shown by the battery indicator on your Xen or Xeo.
* A Green indicator means that you have enough battery power to complete a normal 2 hour dive. The safest way to perform a long dive (5+ hours) is to insert a fresh battery prior to the start of your dive.
* A Yellow indicator means a battery change is strongly recommended.
* A Red indicator means that you must immediately change your battery.
You should always check the battery life remaining on the surface, prior to beginning your dive, by briefly entering simulator mode with your unit. Your Xen or Xeo uses more power in dive mode than in surface mode. It may show a green indicator in surface mode, but a yellow one in dive mode and you can check this by starting a dive simulation.
The discharge curve of lithium-thionyl-chloride batteries is very flat, with a very sudden drop-off, as shown in the graph below.
This means 3 things:
* It is hard to estimate level of charge: The battery shows a steady 3.6V for most of its life - there is no slow battery voltage decrease that can inform your Xen or Xeo about the amount of power that has been used and the amount of power left.
* It is hard to estimate the amount of time left. Even if your Xen or Xeo knew exactly how much battery power is left, it is still hard for your unit to judge how much dive time is left. Dive time will be greatly affected by user settings such as screen brightness and colors.
* Once the battery voltage starts to drop, it drops fast. Your Xen or Xeo will stop functionning entirely once the voltage drops below 3.0V. For this reason, it is important to pay attention to the Yellow battery indication - it means there is really very little time left.
Optimizing Battery Life
You can extend/optimize your battery life in several ways
* Always choose the lowest screen brightness setting you need for your dive. The Xen and Xeo have an "Auto-Dim" feature, where the unit uses your chosen brightness setting on the surface, and slowly reduces brightness to "Low" as you descent to a selected depth.
* Keep battery life in mind when setting screen colors. The OLED screen is an RGB screen, which means it has red, green and blue pixels. To display the color green, for example, it only needs to light up one pixel - the green one. To display any other colors, the screen must light up a combination of pixels. To display white, it must light up three pixels, full-force. Therefore, the most economical display colors would be red, green and blue. The least economical display color is white. The standard Liquivision display color scheme is designed to balance readability with economical battery use.
*90 hours can be achieved when the display is set to lowest brightness, with all the fonts set to green, and the battery is used within a month of initial use.
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