Back in January we reported on a widely observed battery issue with the then-new AirPods Max. Users were finding that their headphones would drop from moderate to almost zero battery capacity overnight, a problem seemingly related to the overly cautious activation of the device's low-power modes (which can't be triggered manually).

Since then Apple has released a firmware update for the AirPods Max that it was hoped would solve the problem - and we are now getting the first indications that the 3C39 update really has improved battery life, writes 9to5Mac.

"Testing done by 9to5Mac's Gui Rambo," the site reports, "shows a major difference in idle battery usage of AirPods Max when in the Smart Case after updating to firmware version 3C39."

Apple seems to have solved the problem by letting the AirPods Max go into ultra-low-power mode (the more aggressive of the device's two battery-saving modes) after 30 minutes in the case, instead of after 18 hours as before.

Updating the firmware of your AirPods Max, like triggering their low-power modes, is not something that can be done manually. It should happen automatically, however, when the device is plugged into its charger and connected to an iPhone.

You can see if you've got the latest update by opening Settings on a connected iPhone and going to Bluetooth, then tapping the i next to the AirPods Max.Scroll down and look for Version - if you're up to date this should read 3C39.

AirPods Max battery problem: Firmware update

Whether this is a temporary fix or a permanent change to the way the device works remains to be seen.

For example, Apple has not updated its support document with information about this change to the power-saving modes. It still reads: "After 18 hours in the Smart Case, your AirPods Max will go into an ultra-low-power mode that will turn off Bluetooth and Find My and maximise battery life."

For related advice, read How to check AirPods Max battery level. And if this news is enough to convince you to buy Apple's headphones, visit Best AirPods Max deals for the best prices currently available.

This article first appeared on Macworld Sweden. Translation by David Price.