Credit: Ryan Haines / Android AuthorityTL;DRSamsung’s battery division has apparently tested a 20,000mAh silicon-carbon battery.The dual-cell battery reportedly developed swelling by the end of the test.The news comes as Chinese manufacturers offer phones with 7,000mAh to 10,000mAh batteries.We’ve seen flagship Android phones with 7,000mAh+ batteries in the last few months, while HONOR has just launched phones with 10,000mAh batteries as well. Now, a leaker has alleged that Samsung is testing a 20,000mAh silicon-carbon battery.Tipster phonefuturist claimed on Twitter that Samsung SDI has tested a dual-cell silicon-carbon battery with a total capacity of 20,000mAh (h/t: Android Headlines). The first cell is said to be a 12,000mAh battery while the second cell is apparently an 8,000mAh battery.