QUOTE(Leo the Lion @ Feb 2 2010, 01:47 PM)
With the new technology that cuts from overcharge, the risk is
LOW from exploding. But you can't ignore the risk, if it have a chance to explode, your phone is a gonner.
Yes, the risk is there, similar with laptops, which previously happened to Dell (the source mentioned it was due to the battery supplier).
So, in this case, one question remains, if you're using your laptop for long hours, when plug into the power outlet, should one remove the battery? I don't think many people do that. I used to do that last time, but it's too troublesome and I believe manufacturer wouldn't build laptops that requires owner to remove the battery everytime when it's plugged into the power outlet.
Nonetheless, the risk is there and pay attention to the battery; usually, you'll notice the battery already bloated or something wrong. I experience one original battery which bloated causing the casing unable to close properly.
I have no comment on non-original battery and non-original charger though. Non-Ori I would refer to those without proper QC or something like that.
Do take note that the charger is also important, if you buy a cheap-fake charger which claims to charge faster, etc. Possibly it's giving more volts than it's required, which causes the battery to heat up faster, etc. It can also possibly damage your battery and in actual, you battery aren't fully charged (even it showed fully charged) because for the full charge cycle, there's 3 stages it need to complete. I've use a cheap fake car charger before and it spoilt my N81 original battery, the battery life suddenly becomes very bad.
You can try google to read more about it and the risk of it.
http://www.batteryuniversity.com/partone-12.htmAnyway, regardless it's a battery or not, as long as it's electronics, even light bulbs, it's important to use the correct rating.
Seems we have gone out of topic, hehe;
Just sharing some information above, not saying it's 100% safe to leave it charge always; Surely there is risk, but it's not always we can unplug the charger immediately it's fully charged, and surely, the manufacturer would've think of this, thus there is automatic cut-off.
My point is simply, for Li-Ion and Li-Poly battery, NEVER let your battery died off and for best efficiency, always keep the battery above certain level (maybe 50%). Simply put, unlike Ni-Cad batteries, we don't have to wait until the battery low then only charge.
Here's a test done by someone using the N95, you can see the difference with different charge cycle.
http://blogn95.blogspot.com/2007/07/gentle...-batteries.html