[FAQ] About the battery in the V

This article applies to:

All users of the Eve V

This article was updated:

16-01-2018 (First version)


Manufacturer: Sunwoda Electronic Co.
Technology: lithium-ion
Capacity: 48Wh

About lithium-ion batteries

The V contains a rechargeable lithium-ion battery. This is currently the best battery type available for light mobile devices, with lower weight, more efficient charging and longer battery lifespan than older battery technologies.

Charging (and discharging) the battery

The battery will automatically begin charging when you connect your V to the supplied USB Type-C charger. For charging, the V uses the USB Power Delivery (USB-PD) protocol. A full charge will take approximately 3 hours. When the battery reaches 100%, the device will stop charging it, and run off the power supplied by the charger instead. Because of this, it is not harmful to leave your V plugged in when the battery is fully charged.

When the device is unplugged from its charger, the rate of battery discharge will depend on use. Please note that the device still uses a small amount of power when it is turned off completely. If you have not used your V in a while it may be a good idea to charge it before leaving the house, to ensure you don’t end up stranded without power.

Tips for improving battery life

The V is a very power-efficient device, allowing it to last long on a single charge. But using so little power overall also means that small changes in power draw can have a big impact on battery life. Some things to keep in mind:

  • External devices that do not have their own battery, adapter, or power cord, will draw their power from the V. That means they can greatly influence the rate at which your battery discharges. USB-receivers of wireless peripherals will also draw on the V for power, even though the peripheral itself may have its own battery.
  • The display is one of the most power hungry components in the device. Lowering display brightness can greatly increase battery life.
  • Using apps that perform many and/or complex tasks such as photo- and video editing software or games will impact battery life negatively.
  • The keyboard backlight will make the device easier to use in the dark, but can be turned off during the day. This can save a good amount of energy.
  • Windows has different energy profiles. Using the Battery Saver power mode will help your device last longer when you don’t need constant high performance.

You can find an in-depth community article here, detailing ways to further improve battery life.

Caring for your battery

As your battery charges and discharges, its maximum capacity will diminish over time. This is normal behavior and inherent to any type of rechargeable battery: it should not keep you from enjoying your device for a long time. That said, there are a few things you can do to keep your battery in good health longer.

You do not need to fully charge or discharge your device before first use. You can charge the device whenever is convenient for you, taking note of the following exceptions:

  • Do not let the battery discharge to the point where the V shuts down due to lack of power. Apart from risking data loss, the battery’s maximum capacity can be reduved when it is completely discharged. Windows should notify you and even shut down your device before the battery level is this critical. That notification is there for a reason!
  • If you plan to not use the device over a longer period, charge or discharge the device to around 50%, and shut it down completely before storing it.
  • It is beneficial for your battery to discharge below 20% at least once every few weeks. Doing this, then fully charging the battery can prolong its lifespan.
  • Extreme ambient temperatures are not good for lithium-ion batteries. They will perform best between 10°C – 30°C (50°F – 95°F). At lower temperatures, battery life may be reduced, though this is temporary. Once the battery returns within a comfortable operating range, its performance is restored. At higher temperatures, the maximum capacity may be permanently affected. Note that these temperatures are for use: the device can safely be stored at much colder or much warmer temperatures.

Battery replacement

If you need to charge your battery more often than you used to, the battery may require replacement. If the device is eligible for warranty and the battery capacity has degraded abnormally, service or replacement will be offered under warranty. If the device is not eligible for warranty or the battery has degraded due to normal wear, paid service or replacement may be offered.

If you feel you may need these services, please contact the Eve support team through the contact form on our support page.