I am afraid I may have to retract what I said about the voltages of the Echo batteries. I was basing that on what at least one vendor has reported. But I just got my Echo batteries and they are coming off the charger at 3.78 volts.
What are other people seeing? Are these actually voltage regulated batteries and not "true" 3.7 volts? Maybe I am having charger problems (or user error)?
Regardless, the performance of them has been spectacular so far, but I am curious about the technical details of this battery.
That is what mine come off the charger at also so I'm sure it isn't user error. I just checked mine for the first time yesterday being as it isn't easy to check the autos. They work very good at that voltage and is why I thought they were 4.2 like the Go-go. Their looks, vapor taste, carto capacity and especially the auto battery makes it my favorite PV.