4PCS MECO 3.7v 4000mAh Bateria Recarregável Protegida 18650 Li-ion
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This is fraud! The battery diameter is oversized. I therefore took off the outer plastic. Below is printed 1800mAh !!!!
I purchased 40 batteries of this type based on a review I did read here. I took a new one of them and measured its voltage, it was partially charged. I used the XTAR VC4 LCD Screen USB Battery Charger I bought from Bang good to fully charge it to 4.2 volts. Then I did place it in my MECO XM-L T6 2000lm 5 Modes Lotus Shape LED Flashlight to discharge it. It worked for 3 houres then the light started fading. At that time I measured its voltage and it was 2.6 volts which means it is almost completely discharged. Then I did give it a full charge to see the mAh it will gain, I used a current of 1 Ampere. I was surprised to find that it gained only 1963 mAh which is half the 4000 mAh stated by the manufacturer. Keep this in mind if you are planning to buy them.