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fenix micro-usb 16340 battery review

BobMc

BobMc

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Just got two of the new 16340 batteries from Fenix with the built-in charging circuit. There's a light on the top that glows red when the batteries charging and turns green when it's finished charging. Which is kinda neat. Took about 1hr 15 min's to charge after I opened the package, don't know how low it was. It fits in a Sanwu Guardian with no spacer or battery magnet. It a little loose, but not real bad. Thinking the spring will keep it firm in the host so it wont move around. Will update this thread in the future after I've run through a couple of charging sessions. Have a decent idea of how long a 18350 battery lasts ( a good quality one ), will take a stab at the comparison time. ( a guess-ta-ment ). Think these may work real well for the EDC's when you don't want to carry a battery charger around with you. Just using my Iphone's micro-usb cable and charger. It recommends .5 of an amp, max 1.0 amp input. here's some pictures you can check out. :)
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Weren't you going to check the claimed mAh with your Opus battery charger? I'd be interested in seeing that.
 
Hey Bob, thanks for taking the plunge and buying these Fenix usb cells, as paul mentioned, finding the real mAh capacity would be great!
Hopefully they'll be as specified.
 
paul1598419 said:
Weren't you going to check the claimed mAh with your Opus battery charger? I'd be interested in seeing that.
Click to expand...

Yes was planning on it, but not sure I can charge them on an independent charger without ruining the batteries charging circuit. :thinking: Would you know a way I could find out? Might have to donate one to the cause and find out. Just got them so give me a bit to play them them, and see what I can figure ?

Edit, was thinking, saw a video of someone going around the battery protection circuit on a 18650, wondering if I could do something like that just to test them on the Opus? :thinking:

BowtieGuy said:
Hey Bob, thanks for taking the plunge and buying these Fenix usb cells, as paul mentioned, finding the real mAh capacity would be great!
Hopefully they'll be as specified.
Click to expand...

Your welcome, was real interested in them. I'll do what I can? To know the mAh's for sure would be real nice. Am hoping they come out with a 18350 that has the charging circuit , think that would work for me much better, but I can use the 16340's in a pinch. :)

Will update when I get some more info. :)
 
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I could be mistaken, but I think it was stated that you could charge these on a normal battery charger.
 
Update;

Used the charge/test mode on my Opus bt-c3100 and did the mAh test on the two 16340's I got from Fenix.

Battery (1) 645mAh @ 4.19 volts
Battery (2) 667mAh @ 4.20 volts

Not to bad, as their listed as 700mAh. :thinking: I like the idea of the micro-usb charging port. Still hoping they come out with the, usb 18350's,18650's and 26650's think that would be :cool:

( I can dream ) :)
 
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Did you happen to check the internal resistance? I would also like to know that as well. Thanks. :D
 
paul1598419 said:
Did you happen to check the internal resistance? I would also like to know that as well. Thanks. :D
Click to expand...

Just did it;

One battery shows 0.177, next battery shows 0.202

Your welcome :)
 
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That's not terrible, but my Panasonic 18650 batteries were better at 0.050 and 0.068. I have some Ultrafire batteries that do the same at under 0.200 ohms.
 
paul1598419 said:
That's not terrible, but my Panasonic 18650 batteries were better at 0.050 and 0.068. I have some Ultrafire batteries that do the same at under 0.200 ohms.
Click to expand...

What is the purpose of the internal resistance test? What does it show? :thinking:
 
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The internal resistance is the impedance of the of the battery measured as the difference between the voltage at no load and the voltage drop across the battery under load. For Li-ion batteries it is a good way to estimate the remaining life of the battery. The lower the internal resistance, the better the battery's ability to charge fully and discharge into a load.
 
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paul1598419 said:
The internal resistance is the impedance of the of the battery measured as the difference between the voltage at no load and the voltage drop across the battery under load. For Li-ion batteries it is a good way to estimate the remaining life of the battery. The lower the internal resistance, the better the battery's ability to charge fully and discharge into a load.
Click to expand...

Good explanation, thanks for the info, good to know. :thanks: :)
 
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