Thread: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
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retsaw is offline retsaw
2011-04-14 , 13:29
Posts: 701 | Thanked: 585 times | Joined on Sep 2010 @ London, England
#516
Originally Posted by geneven View Post
Do you suppose you are the only one who uses the battery to the full extent and changes the battery on the fly, taking 7 secs or less? I've been doing that with Nokia tablets for three years or so. The Scuds are the way to go evidence in this thread indicates.

But how do you change batteries on the fly without rebooting?
You can hotswap on the N900. What you have to do is turn off anything which uses too much power (you'll want the power consumption not to go over what the charger can supply), plug the charger in, when it starts charging type "stop bme" as root in the terminal, you now have up to 32 seconds to hotswap before the charging circuit switches to low-power (100mA) autonomous charging, swap the battery the restart bme ("start bme" as root), lock/unlock screen to restore backlight.

As a warning I have had my N900 turn off before the 32 seconds time-out when doing this, so it's best doing as quick as possible just to be safe.