The BTR5-2021 model has a built in voltage regulator, so when plugged into USB it charges to 80%, and will recharge at 20%, according to FiiOs specs.
IDK if that's true, because I only use mine for portable bluetooth use.
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The BTR5-2021 model has a built in voltage regulator, so when plugged into USB it charges to 80%, and will recharge at 20%, according to FiiOs specs.
IDK if that's true, because I only use mine for portable bluetooth use.
BTR15 which is the updated model of the BTR5 might be better if you're worried about the battery charging and discharging. It is unreleased but it is announced and should be coming soon-ish. It also has a few other upgrades if you want to look at it.
It's not a good pick for desktop use. Like you say it's constantly using the battery and it will wear it out if you leave it permanently connected. Mine did.
Qudelix 5K is much better for this, it will charge (to 80% if you set it to that) and then stop and power itself off the USB.