In most arsenic minerals, the arsenic replaces sulphur in more familiar minerals. The hard and heavy mineral NiAs, niccolite or kupfernickel, is an example. Silver white cobaltite, CoAsS, is hard and heavy and occurs in pyritohedrons, but is distinguished from pyrite by its colour. FeAsS, arsenopyrite, is perhaps the commonest arsenic mineral, and is also called mispickel. It is found in striated prisms. The mineral once known as smaltite, now as skutterudite, is (Co,Ni,Fe)As3; it contains varying quantites of the iron group metals. Proustite, Ag3AsS3, or "ruby silver," is soft and of medium weight. Cu3AsS4 is black enargite, the source of arsenic in the mines of Butte, Montana. Note that in the last two compounds, S has replaced O in the arsenate and arsenite. Enargite is cuprous thioarsenate.

Maybe not "arsenic metal" but may indeed form deadly compositions and be deadly. Arsenic metals have a better capability to absorb into human tissue and cause serious damage due to polarity changes of arsenic. Nickel itself is quite dangerous itself.

Don't give out false information... that is very outadated. Actually, with modern bateries, the opposite is the truth - they should never be fully uncharged or that might damage them.

Anyway, and given the poor batery life of the N900, provided you use this device on the go, you won't have much problems having regular charge and discharge cycles...

My 5800 XpressMusic, which predates the N900, makes that suggestion. So does my N78-3. Where did you get the impression that N900 was first?



N78-3 showing unplug charger message.

chill out dude , before N900 I only had N95 8gb so i didn't know that they implemented such feature...geez

Apology for shooting from the hip without fact checking accepted.

Either way, the "unplug charger from the wall" advice is complete bullsh1t - phone chargers have been Switch Mode Power Supplies for years now where if they're not charging the phone you can barely measure the power they consume it's so tiny. It's utter nonsense to suggest that somehow unplugging it will make any difference to "saving energy".