Stop use
Non-original batteries can provide the performance effects of slow and destructive devices used, and may well have exceeded that warranty is not valid anymore. Ori battery using Seal (Part bordering edge connectors) made from rubber. Mobile devices that are BM (Black Market) is usually the battery is not authentic so impressed cheaper.

Check hologram battery
Angle the hologram image in the battery to the left, right, down and up, will be displayed one, two, three and four dots or points (dots). When examined again, in a fake battery, installation of this hologram is placed sideways or sometimes irregular. Research could also spell the text is in hologram sticker and, because of the fake batteries sometimes there is a typo with the incorrect spelling.

Check the hologram label logo
For example, for Nokia phones, users should see the hand that almost touch (connecting hands symbol) Motorola symbol from one angle and the Nokia Original Enhancements logo from another angle. On the fake batteries, printed labels are not very good and somewhat blurred. If rubbed by hand, it will be easy to lose the text, because the printed paper certainly made his own label, not from the official manufacturer.

Check seals on the battery pack
Batteries are mostly made in China. So often, the sellers add a stamp made in China or KW-1 in the battery pack. Users can ask the merchant, whether these seals are supplied with the product or printed later.

Check price
Fake batteries usually come from China and Taiwan sold for less than the original. However, do not be fooled again and check the physical condition of the battery, because in order to convince buyers, sellers sometimes do not give a price much different from the price of the original battery.

Source: http://www.beritanet.com/Literature/Tutorial/Tips-Baterai-Ponsel.html