> For the complete documentation index, see [llms.txt](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/senstream-research-ring/charging-and-power-management-basics.md).

# Charging and Power Management Basics

First things first! Charge your ring! It leaves the factory in a “shipping mode” which requires power to be applied to the ring to power it on. Each ring is supplied with a charging cable that magnetically couples to the innermost electrodes. It can be applied from either side of the ring and doesn’t require the removal of any sizing shims

To charge your Senstream ring, connect the charging cable to a safety certified (for your region) USB charger with at least 500mA of current (this is typically the minimum of most USB chargers).

The state of charge is indicated by the color of the indicator light.

<div align="left"><figure><img src="/files/Z4zDI0hHCamEXUWQldxu" alt="" width="375"><figcaption><p>Yellow = Ring Battery Charging</p></figcaption></figure> <figure><img src="/files/1tCtORZMvzHydsyrcmAy" alt="" width="375"><figcaption><p>Green = Ring Battery Fully Charged</p></figcaption></figure></div>

***

### Power Saving Sleep Mode

After about 2 minutes of inactivity the ring will enter a sleep mode to conserve battery charge and shut down the LED.  To wake the ring, simply tap the ring and the flashing LED will indicate the ring is now awake.

<div align="left"><figure><img src="/files/bL1hlC8sS6MApxSSuClI" alt=""><figcaption></figcaption></figure></div>


---

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