Omnia Overcharge

[Guest Natsirt]

Hey guys, i was just wondering if the omnia gets overcharged when you have it charging with the power plug. some old phones overcharge if u leave the charger in there after the phones battery's full, and that shortens the life of the battery. But i noticed that with the omnia, it heats up when its charging, and when its full and the green light is on, the back is completely normal, no heat what so ever, so does this mean that it has stopped charging and that leaving the charger in the omnia after the green light comes on wont damage the battery??

[Guest Chugworth]

It's no problem to leave the Omnia plugged in. And that goes for just about every modern cell phone.

Edited March 11, 2009 by Chugworth

[Guest d-ranged]

Im pretty sure when the omnia is fully charged it will just run on socket power and disable the battery.

[Guest justpratik]

Im pretty sure when the omnia is fully charged it will just run on socket power and disable the battery.

you are right ..

how the green light on power button is get on after full charge?

[Guest dwallersv]

Any phone that uses Lithium Ion battery technology has a "smart" charging circuit managing the charging process. LiIon chemistry, unlike NiMH, is dangerous if overcharged (recall all the laptop battery recalls over the last few years due to risk of fire!), and very sensitive to damage if over-discharged.

Fortunately, the charging algorithm is pretty simple, and there are cheap cheap cheap ICs on the market to control LiIon charging. All cell phones that have LiIon cells (which today is just about all of them) have such circuits in them.

[Guest dwallersv]

Im pretty sure when the omnia is fully charged it will just run on socket power and disable the battery.

Well, in effect yes. But not in actual implementation -- the battery isn't "disabled".

[Guest trexflyer]

Any phone that uses Lithium Ion battery technology has a "smart" charging circuit managing the charging process. LiIon chemistry, unlike NiMH, is dangerous if overcharged (recall all the laptop battery recalls over the last few years due to risk of fire!), and very sensitive to damage if over-discharged.

Fortunately, the charging algorithm is pretty simple, and there are cheap cheap cheap ICs on the market to control LiIon charging. All cell phones that have LiIon cells (which today is just about all of them) have such circuits in them.

Exactly. Which is why it will be some time before we ever see smaller, more powerful LiPo batteries in cell phones. They are extremely volatile and WILL catch fire if over/under charged. Guess that's why i have $120 computer controlled battery charger for all my r/c plane batteries.

[Guest Natsirt]

Thanks for the reply guys =)

[Guest dwallersv]

Exactly. Which is why it will be some time before we ever see smaller, more powerful LiPo batteries in cell phones. They are extremely volatile and WILL catch fire if over/under charged. Guess that's why i have $120 computer controlled battery charger for all my r/c plane batteries.

While what you say about the danger of LiPos is spot-on (I'm and RC Heli guy), the increased risk is really not the reason they aren't in cellphones (although it does contribute). The main reason is that the volumetric energy density between LiIon and Lipo is about the same, so there's nothing to be gained.

OTOH, the mass energy density is substantially in favor of LiPo, and that's why we nuts flying these little model aircraft are such fanatics about LiPo chemistry B)