Sony VTC4 18650 batteries

[cloud_nine]

i've started using these batteries and started to notice that in some areas of the battery there are some slightly dark discoloration on the batteries. Are these defective? safe? trying not to blow my face off over here LOL

[Compenstine]

Please post a pic of the battery and show where it is getting darkened.

[Jeffb]

Yes pics would help. It doesn't sound good though.

[joejoevapekins]

Dark spots some times mean there is a leak in shell. Just speaking from past experience with high power led flashlights

[Joshuab3687]

Dark spots are a no go! Its what I call a "soft vent". Means the battery is leaking and could go critical with a full on "venting" episode. You don't want that in your hand when it goes!

[Compenstine]

Dark spots are a no go! Its what I call a "soft vent". Means the battery is leaking and could go critical with a full on "venting" episode. You don't want that in your hand when it goes!

It could very well be a legit Sony and just defective.

[Joshuab3687]

It could very well be a legit Sony and just defective.

Quite possible! I have 1 thats defective thats in my exclusion "safe" bag. Its the same kind of bag I put my Li-Po batts I use in my R/C heli's in when charging.

[BestVapes]

i've started using these batteries and started to notice that in some areas of the battery there are some slightly dark discoloration on the batteries. Are these defective? safe? trying not to blow my face off over here LOL

if the battery is authentic and was produced by Sony I would deffinetly try and contact them and ask for a replacment. sony being the company they are they will most likely replace the battery at no charge, the down side is how long it will take for sony to get back to you, evidence proving the battery is defective proof of purchase yadda yadda yadda. post some photos on here gosh darnit