Test / Review: NCR18650A protected (Green)

Thanks again HKJ!

Thanks HKJ.

Unfortunately, like you said, we're quite likely to see fakes soon. Which is why I hoard Panasonics right away before they are more popular. Later, they might just be like TF / UF right now, very hard to find genuine ones.

And with gleaming reviews like this all over BLF and elsewhere, I'd expect this won't take too long.

Thanks a lot for another detailed review! Frontpage’d and Sticky’d.

Thanks for the effort HKJ.

Thanx HKJ!

Are these the same cells: http://www.ebay.com/itm/NEW-2X-Panasonic-18650-3-6V-3100mAh-Rechargeable-Li-ion-Battery-2-NCR-Batteries-/330634383068?pt=US_Rechargeable_Batteries&hash=item4cfb584edc

So the green ones are not “dual protection” — what’s the difference?

No, the tested batteries are with pcb protection, your link is without pcb protection.

It would be correct enough to say dual protection about the tested batteries.

The cell has some safety build in and it also had the pcb protection.

Nice review. So how much are these batteries and where can you purchase them? Where did you get the ones you tested from?

Ok I see Deal Xtreme listed.

Sigh, so true.

By then Imma hop on the LG 4.35v bandwagon before that falls to the fate of the fakers too!

Would it be safe to say that the current ones for sale are all genuine? I guess I should start stocking up as well.

I found these on ebay. Would you guys say that it is a safe bet to buy these?

Adn what about those NCRs with very popular prices on buyincoins?

[quote=Rozen]

If the price is much below $10 I would not expect them to be genuine, at or above $10 they might be genuine

Sorry… Wrong post

A fully charged cell, 4.200V resting voltage, has 3000mAh measured capacity at -0.2A discharge rate.

How much capacity does the cell have, starting off 4.100V resting voltage? :)

Any tests, measurements or estimations?

You mean a slightly overcharged cell!

I did test a bit on this before I started my battery test, but it was also before my test stations was finished, i.e. precision is slightly lower.

I do hope to return to these tests and do a couple of different LiIon batteries, but as long as I have lots of batteries for the battery test, it will have to wait.

i think that's exactly what i was talking about: the discharge capacity of a li-ion cell starting off a resting voltage other than the (slightly overcharged but "standard") 4.20V.

so from the table i am gathering that the AW cell (-0.1A, 4.10V) contains only 89% of the max possible capacity (-0.1A, 4.20V, 2336mAh), namely 2072mAh.

reason why i am curious, it happens that the integrated flashlight charger of one of my flashlights only charges the cells to 4.103V, while i was expecting 4.15V or higher. poor charging circuit in my flashlight!!

well this reminds of a night club where i order a 0.2L glass of cold coke but the tender serves a half-a**ed glass with maybe 0.17L in it hehe. gotta hate that club!! ;)

Thanks HKJ as always! :)

When are you measuring the voltage?

The table contains 3 voltage values.

1) Charger voltage

2) After 10 seconds

3) After 60 minutes

Your value is probably a 10 second or a 60 minute value.

Good point. When the flashlight signals "charging done!", i take out the HQ cells (18650 Panasonic) and measure their voltage (i.e. after 10 seconds). UT61E would show a 4.104V offline reading. Since these are HQ cells, the self-discharge rate, offline, is super low. After 60 minutes UT61E would still return ~4.10V, so no big difference/self-discharge/loss of capacity.

Thank you SO much for this review. I have been looking all over the net for a decent one that was clear with the information!