Check whether you get a high load average whenever Wi-Fi kill switch is off. If so, keeping it on and turning Wi-Fi off in software may give you better results. There are patches to fix that, but they need more work not to cause troubles with older cards (Redpine).
There was also another issue that may have caused interrupt storms when kill switches were set to off, but that has been already fixed recently.
There are some small power consumption improvements coming in kernel updates soon too, though these shouldn't make a drastic difference, just an extra hour or so.
Check whether you get a high load average whenever Wi-Fi kill switch is off. If so, keeping it on and turning Wi-Fi off in software may give you better results. There are patches to fix that, but they need more work not to cause troubles with older cards (Redpine).
There was also another issue that may have caused interrupt storms when kill switches were set to off, but that has been already fixed recently.
There are some small power consumption improvements coming in kernel updates soon too, though these shouldn't make a drastic difference, just an extra hour or so.