USB device with battery | PCSPECIALIST

USB device with battery

sufiqelo

New member
It maybe a dumb question but if you charge a device, like a game controller or torch, from a USB port on a PC and leave it connected after you've shutdown the PC and then turn it off at the wall does it drain the battery? My first assumption was no but i noticed when everything is powered up the following day the charging light lights up for a good while so I'm wondering if my assumption is wrong.

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SpyderTracks

Bingo Bango Orchestrator
Moderator
It maybe a dumb question but if you charge a device, like a game controller or torch, from a USB port on a PC and leave it connected after you've shutdown the PC and then turn it off at the wall does it drain the battery? My first assumption was no but i noticed when everything is powered up the following day the charging light lights up for a good while so I'm wondering if my assumption is wrong.
not if the pc is turned off at the wall, it has no power. Batteries decharge when not on charge weather being used or not.
 

B Poot

Bronze Level Poster
You can get some USB ports that continue to charge if the computer is 'off' (but still powered at the wall), kind of like a pass-through for charging, but not all USB ports are like this.

It is worth noting that if you leave your device plugged in all the time so that it is charging every time that you turn on your computer, there is a good chance that you are decreasing the health of the battery. Over time, this could mean that it can't hold as much charge as it used to, and consequently could seem to decharge quicker, even when it is not being used. I did this with my first laptop many years ago (always running it from mains power) and it got to the point where the battery power on it's own would last for 1 second before running out of charge and turning off the computer!

For most rechargeable devices, it is best to only charge them when they need it and you are going to use them shortly afterwards. If you are not going to use them for a while, it is better to store them at around 50% power. However, this does depend on the specific battery chemistry, so it doesn't hurt to look it up.
 

Martinr36

MOST VALUED CONTRIBUTOR
The batteries in my drone are designed to drain from 100% to about 75% over 5 days when not being used and left in the drone, it's a safety feature
 
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