A rechargeable battery becomes bloated when the outer shell is broken due to extreme temperature. Nickle-based batteries, such as NiCd and NiMh batteries, react especially poorly to very cold or very hot temperatures. The most common cause of rechargeable battery bloating, however, is when a rechargeable battery is overcharged and therefore exposed to too much heat. if you touch a battery charger right after use you will notice it is warm. The electric charge causes heat which can break the outer shell of a rechargeable battery. Lithium-based batteries, such as Li-Ion or lithium polymer batteries, are extremely susceptible to overheating due to overcharging.

Avoiding Overcharging
To avoid overcharging, and therefore bloating, make sure you are using the manufacturer's prefered battery charger. Lithium-based battery chargers have a timer mechanism that prevent overcharging. If this type of charger is not used the battery will overcharge and overheat. Trickle-chargers, though good for saving energy, are often incompatible with rechargeable batteries and, if used, can cause overheating. If a bloated battery is used the outer shell can crack completely, leaking toxic chemicals which can catch on fire or even explode.

Factory Mistakes
In the past there have been battery recalls for products whose batteries inadvertently bloat. If you purchase such a product, make sure to replace your battery before using the product again.

Read more: http://www.doityourself.com/stry/why-a-rec...becomes-bloated

remember?



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This post has been edited by Xploit Machine: Apr 8 2011, 03:29 PM

if it is as bloated as shown in your pic no way in hell it can be placed inside the phone. therefore always buy ori..you know now packaging is also faked

Yes, but even items finished in China have quality, eg. original Nokia's which are finished in China are not China product, however the quality assured by Nokia, Finland since Nokia Finland is no more producing the phones in the region, most are "Outsourced"

There should be a way of determining between fake and real products .. IMHO internet is a good reference resource

below are some examples:

must pinned it up this useful thread !!!

Nowdays its very hard to compare the fakes and genuine.
From rice till egg.From iPhone to jPhone.

A very good guide

Thanks