I have two Sony vtc4 from one place and two from an online store that has only recently gotten them back in stock. How do you know if a battery is a re-wrap fake or not??
Re-wrap Batteries??
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This is regarding VTC5's, but the ideas are the same. You look at the battery and check it against a known good one. The other way is to create a discharge curve and compare that to a known good VTC4 curve.
My preference is to buy only from known good suppliers so I don't have to worry about counterfeits. Who are your suppliers?
My preference is to buy only from known good suppliers so I don't have to worry about counterfeits. Who are your suppliers?
Two came from a local store in town and two came from smoktek. The two from smoktek seem fine and measure a .4 voltage drop under load like stated by some other people for Sony VTC4 (I believe they said that was at .5 ohms and my PVD was at .487 when I measured voltage drop to check). My other two batteries however have a much bigger voltage drop and I don't know if that means they are fake or they have been cycled a lot before I bought them and were not even close to being new.
Is there a way to use a DMM to measure a batteries continuous maximum discharge amp rating??
That would be a serious indication to me that these batteries are not the same or have been used a lot. They have higher internal resistance and will not handle the same current draw that good batteries will.
I'm not sure what fake batteries look like under the wrap, but I just rewrapped an authentic Sony VTC5 and it had the same letters and numbers that was on the wrap on the metal casing. So if you are really concerned, you could unwrap it. Rewrapping is SUPER easy and SUPER cheap.
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