except if you are someone like me, almost 24/7 play Magic2013

why dont you unplug, dont u feel the cable us annoying?

My bro's iPad2 died yesterday - always plug to AC outlet. Now can't even power up. Only power up when AC is connected. I suspect either battery or some charging circuit kaput. Will send in for warranty next week.

same happened to my colleague sony ericsson xperia which use less than 1 year, he claimed that his hp battery cant last for half day without charging, under normal usage and killed a lot of background apps but still doesn't seem the improvement... He claimed that previously he always plug cable onto his laptop to upload/download data and charging most of the time... for mine, i used samsung galaxy ace for 1 years+, battery still can last 2-3 days under normal usage as i charge my hp while low battery level only...

actually it wasn't the matter of keep charging or auto cut off when full...
it is the matter of "Battery Memory Effect" will cause the poor battery performance...

i'm from portable wireless devices background previously which required high battery output for full functionality and facing some failure of battery sometimes due to improper usage.

based on my experiences, i understood most of latest equipment will auto cut off when fully charged and will charge again when battery level drop to 95% (for ipad and MacBook) something to optimize the power capacities "once-a-while"... but it may "telling" the battery 95% is the low battery condition and seem the battery "remember" the smaller capacities instead from the 5% charging...

so the reasons of "poor" battery isn't the high wear and tear issues, it is because we are no activating 100% of battery chemical for the long run as we are charging for the 5% only, so battery seem that it become "lazy" as work lesser... if charge from 80/90% will "wake up" the battery which required battery to "active" all the time...

just my 2 cent from my experience...

I always left my ipad overcharge from night till morning. I think apple IOS will stop the charging once it reached 100%.

Apple does in fact display the iPad (and iPhone and iPod Touch) as 100 percent charged just before a device reaches a completely charged state. At that point, it will continue charging to 100 percent, then discharge a bit and charge back up to 100 percent, repeating that process until the device is unplugged.

Doing so allows devices to maintain an optimum charge, Apple VP Michael Tchao told AllThingsD today.

“That circuitry is designed so you can keep your device plugged in as long as you would like,” Tchao said. “It’s a great feature that’s always been in iOS.”

I everyday also charge my ipad every night even before it haven't reached 40%......