battery,phone,or normal?

[mark elmore]

Wirelessly posted (Omnia1: Opera/9.5 (Microsoft Windows; Windows CE; Opera Mobi/9.5; U; en) VZW:SCH-i910 PPC 240x400)

when my phone drops to 25% left on the battery it slows way down on everything. is this a normal behavior?
the phone part shuts off at 10% and wont make/ recieve calls(its just a pda),camera wont work and wifi shuts down at 15%. i dont mind the wifi but the phone part and slow down are annoying.
are these all normal and is there a work around?
i tried to kill the battery to recalibrate it to the phone occasionally but everything that consumes any major battery is off so when I go to bed its 5% and next morning still 5% , just a fancy brick until I charge it

[DJx79x]

the wifi/phone/camera shutting down is a powersave feature in an attempt to keep the phone running but idk about the phone slowing down, my phone shuts down features also but it still reamains at the same speed.

[nitrous9200]

Makes sense. On another note, I have heard that running lithium ion batteries into the ground (in terms of going down to 0% charge) is bad for them and shortens their lifespan. But I still have not been able to find a good source of info about batteries or at least certain ideas that are shared by various sources. Must be a conspiracy by the battery manufacturers to get us to wear out our batteries quicker and buy new ones.