My EVVA Li-ion arrived from Bang Good today and I’m a bit concerned about the label and wrapping. The label, under EVVA, says Protected 3.7V Li-ion Rechargeable Batter(?). Where is the ‘y’? The website shows ‘battery’.
Also, the positive terminal on my battery is nearly flush with the ‘black’ gasket and shrink wrap, whereas, on the EVVA website the terminal is at least raised by a decent amount and the gasket is white.
Still conducting runtime/charge tests, so I’ll come back to that. However, my runtime on two runs is significantly less than my Trustfire 900MAh batts.
You wouldn’t happen to have a charger which can do a discharge capacity test, would you?
Evva 14500 would be a Sanyo UR14500P 840mAh cell with a seiko protection board. The miss-spelling is defiantly a bad sign. With other products at least, wrong spelling does indicate fakes. Is there any indication that the label printer just had a problem? Faint or partial “y”, spot of ink, other bit of printing missing.
I have an Imax B6 with which I could do a discharge down to 3.7V. So far after one torch discharge and one charge I’ve only managed to put about 630MAh back into it. Another charge coming up this morning.
You could try contacting Evva about whether your battery appears genuine. 14500 on Evva’s site.
The top being different on your banggood battery is also a bad sign. But I would expect that Evva will make flat top versions if a customer requests. So it’s possible banggood got a deal on some flat top 14500s from Evva or some just got mixed in. Do you have any replacement shrinkwrap
Oh you have a hobby charger, excellent! The imax b6 has a discharge test. I would expect it to come from the factory already set to 3.0v end cut-off voltage. But the imax b6 manual does indicate that you can adjust the end cut-off voltage if needed. Go into “Li Io DISCHARGE” mode then tap “Start/Enter” until you’ve selected the voltage (the item selected will blink), and the INC or DEC key will change the value. Hold Start/Enter to begin the test.
Last night I discharged all three of my 14500 cells in my Trustfire R5-A3 torch until each one cut off. Put all of them back in my torch this morning until they all cut off again, a matter of moments, just to make sure.
The run times were as follows:
EVVA 800MAh: 28m 43s
Trustfire 1 900MAh: 38m 49s
Trustfire 2(water damage) 900MAh: 33m 25s
Currently charging one Trustfire 900MAh batt at 0.3Amps and I’ll do the same with the EVVA and I’ll take note of how much MAh I stuff in. I’ll then do a discharge on the Imax and see what I get from all three cells.
