Just to confirm - it's very important to only charge your battery when it is completely flat as part charges reduce the usable capacity. It's called the memory effect and some types of batteries are far more prone to it then others
No, this is wrong. for NiCd batteries it's partly true, but you needed multiple partial discharge + Charge cycles to precisely the same amount to cause it.
Lithium Ion batteries do not suffer from the memory effect. specifically, lithium ion batteries lose capacity all the time, for numerous reasons: just sitting there, being charged, being discharged, being warm, being too cold etc.
ordinarily, (especially for things like laptops) it's best to discharge Li-Ion batteries as little as possible. obviously in a phone like this that's not really possible, but its a good idea to charge the battery whenever you have the opportunity.
the reason why a couple of full charge-discharge cycles are required to get the battery to it's highest capacity is because on a new battery, the charge/capacity monitoring hardware has not been calibrated yet, and fully charging, discharging and charging again ought to set this properly. it's probable that the batteries capacity monitoring hardware (i'll explain why it's there in a sec) thinks the battery has less overall capacity then it really has.
now, Li-Ion's have a tendency to just drop stone dead
OR simply explode if they're discharged below about 3.3v (natural voltage is 3.7), and this happens when they're discharged all the way down. the batteries capacity monitoring hardware cuts the battery/cell off before this happens, but even with this safety-cutoff point, it's still unwise to discharge Li-Ions as far as they'll go because:
fully discharging a Li-Ion battery/cell WILL reduce total capacity, the amount varies on the temperature, speed of discharge and the age of the battery.
higher-speed discharge = more damage
older battery = more damage
higher tempetature = MUCH more damage.
there's a good reason why the BatteryLife Widget shows you the batteries temperature and voltage
that was for NiMH batteries, LiIon doesn't have a memory effect and fully draining them can damage them.
exactly
Took the plunge and ordered one
nice one Mate! i hope it arrives lickety-quick
