Mountxin 1 Piece 18650 3.7v Rechargeable Li-ion Battery 5800mAh Battery - Yellow+Green

Another Chinese seller trying to sell counterfeit batteries.These claim to be 5800mah but it's physically impossible to have such a high capacity in an 18650 battery. The max capacity by today's technological standards is about 3500mah and I wouldn't be at all surprised if these hold less than a few hundred mah as a lot of counterfeit batteries do.Furthermore, genuine 18650 batteries cost way more than this. A SINGLE battery with a capacity of 3500mah usually costs anywhere between £15 to £25 (depending on the brand and whether it has protective circuitry or not) and this seller is trying to flog off this battery for just over £5?! That should automatically ring alarm bells.How to spot fake 18650 batteries:1) Always check the seller details; if their registered address is based in China (which this guy is) then it's guaranteed to be counterfeits.2) Price! If it's dirt cheap like these then avoid them!3) If they claim the capacity is over 3500mah. As stated it's not possible for these kind of batteries to hold more than said capacity.Basically, if it looks like it's too good to be true, it usually is so avoid these at all costs.