I have this battery. The "gold" one. When i bought it, it lasted ~1 day. And i was refunded by the ebay seller. But now i use it for about a week, and it lasts 3 days. I use my phone to call, send sms, listen to music, and with wifi open. Anyway i dont think this battery has something special..
S4 Mini LTE Black Edition powered by CyanogenMod 11.0 Nightly
DEV - Galaxy Ace 2 firmware: KYRILLOSv9.JB.XXMG2
DEV - Galaxy 3 firmware: Kyrillos' ROM v10.6
(Android 2.3.7) // Kyrillos' ROM v9.7.1
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