A new firmware update has been released for the MagSafe battery that will allow it to charge an iPhone a bit faster. When plugged into a 20W charger, the MagSafe pack can transfer up to 15W of charge to an iPhone, but now the MagSafe battery pack will be able to charge up to 7.5W off the grid electric. Previously, it only charged up to 5W when portable.
Apple has updated its support page with details on updating your MagSafe battery. You can use your iPhone, iPad or Mac to update the pack. If updating with an iPhone, the pack will automatically update when connected to the device, although this may take up to a week. Apple says you can connect the MagSafe Battery to an iPad or Mac and the update should take about 5 minutes.
To check that the latest update has been installed (version 2.7), connect the pack to your iPhone and go to Settings > General > About > MagSafe Battery Pack.
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