Why are my power beats dying within 10-15 minutes after a full charge

Hi @harley1779

Most probably the batteries are failing and need to be replaced. Even rechargeable batteries have a lifespan.

Here's a teardown video that may help.

At 1:30 minutes into the video the battery is shown.

Unfortunately it is too unclear when zoomed in to make out the model number of the battery. You may have better luck.

If you decide to replace the battery, search online for the model number on the battery and get the type that has "solder tabs" attached i.e. (insert model number) with solder tabs, so as to make it easier to reconnect to the motherboard.

You need to apply too much heat when trying to solder batteries without them and this can damage the battery.

Also check the polarity before disconnecting the battery (or take pictures) so that you connect the replacement battery the correct way.