I’ve been really impressed by my new Steam Deck OLED. I was looking for some specific charging speed information online, but couldn’t find it, so I measured myself.

Specifically, I wanted to know:

- How long does the Steam Deck charge at maximum speed?
- What is the “sweet spot” to charge the battery up to? 80%? 90%?
- How full is the battery when charging slows to 20w? 15w? 10w?
- How charged is the Deck when the LED turns green?

I used the included 45w charger and my USB-C power meter, charged while the Deck was sleeping (rather than off), and turned the screen on every five minutes to check the charge percentage. I ran the Deck all the way down to start (until it turned off), so it was off for the first five minutes).

Here is a summary of charging times and speeds - the first two rows are the results after 30 and 60 minutes, and the rest are times to get to specific charge levels.

0% -> | Time | End Watts |
---|---|---|

37% | 0:30 | 41w |

72% | 1:00 | 40w |

80% | 1:08 | 30w |

85% | 1:15 | 22w |

90% | 1:25 | 15w |

95% | 1:40 | 10w |

100% | 2:10 | - |

If you’re using a USB power meter to monitor charging, here is how charged the Deck is when the charging speed slows to different rates:

Watts | % |
---|---|

41w | 0-70% |

35w | 76% |

30w | 80% |

25w | 83% |

20w | 86% |

15w | 90% |

10w | 95% |

7w | 97% |

5w | 99% |

To answer my above questions:

#### How long does the Steam Deck charge at maximum speed?

The Steam Deck OLED charges at the maximum 41w from 0-70%, which it reaches in just under one hour.

#### What is the “sweet spot” to charge the battery up to?

I think waiting 1:15 for the battery to reach 85% is about ideal. Charging speeds are less than half of peak speeds above that.

#### How full is the battery when charging slows to 20w? 15w? 10w?

Charging slows to 20w at 86%, 15w at 90%, and 10w at 95%

#### How charged is the Deck when the LED turns green?

The Steam Deck OLED charging LED turns green when the battery is 95% charged, after which charging is very slow. It’s another 30 minutes to reach 100%.