Apple yesterday
released a firmware update designed for the
MagSafe Battery Pack, and it turns out the new firmware enables 7.5W charging while on the go, up from the previous 5W limit.
In an
support document, Apple says that MagSafe Battery Pack owners can update their firmware to the new 2.7.b.0 release to get the faster 7.5W charging capabilities.
Updating the MagSafe Battery Pack can be done by attaching it to an iPhone and waiting (a process that can take up to a week), or using a Mac or an iPad to update within five minutes. Apple suggests users attach a Lightning cable to a MagSafe Battery Pack and then plug in the USB side to an iPad or Mac to initiate the update process.
You can check to see which firmware version your MagSafe Battery Pack is running by attaching it to an iPhone and then going to Settings > General > About > MagSafe Battery Pack. You will need version 2.7.b.0 to get the 7.5W charging.
www.macrumors.com
