Test / Review: Keeppower 18650 3400mAh (Black)

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MountainKing
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Thank you master Smile

Never ever forget and forgive. Niwal**er new kid on the block trying to act tough.
http://budgetlightforum.com/node/24847
Do not support this brand.

DINODIRECTSCAM COMPANY. DO NOT BUY
http://budgetlightforum.com/node/11324?page=2#comment-254983

KumaBear
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Hello!

We're expecting these batteries (and many other top-rated batteries) in the US in 1 to 2 weeks.  Please refer to:

http://budgetlightforum.com/node/13527

(Highly Competitive) Pricing should be available within a day or two but we will not accept any payments until the batteries are in our US warehouse.  We'll be asking for "RESERVATIONS" shortly but we will not accept any funds until we're ready to ship the batteries to your door.

The RESERVATION SYSTEM appears to be the best way to:

1) Find out your needs (and adjust the quantities in our FIRST SHIPMENT - we have a couple of days left to do that.)

2) Create a list of potential orders - particularly where the FIRST SHIPMENT may not fulfill everyone's needs for a specific item.  The first people to RESERVE batteries will have the first option to purchase them.

Best Regards,

Bob 

KumaBear

CM2010
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$13.50 each, just ordered a couple.

http://www.cnqualitygoods.com/goods.php?id=1776

Woody
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CM2010 wrote:

$13.50 each, just ordered a couple.

http://www.cnqualitygoods.com/goods.php?id=1776

Hope you get them. I’d a problem with an order of some batteries from http://www.sz-eyoung.com/
Basically the cells were returned to the seller by HK post. China post won’t take them either. Apparently the problem is that the restrictions on li-ions are being rigorously enforced at the moment, prior to a big Chinese government meeting later in the month. I assume this is to do with the formation of the new government next month.

Still, communications with Jone (who’s a member her, I think) was excellent, and my paypal account was refunded. He thinks that things should be better after in a month or so, so I’ll probably spend even more then.

Jell
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Hank just released his version of protected NCR18650B~
http://www.intl-outdoor.com/2-pcs-panasonic-ncr18650b-3400mah-protected-...

Shadowww
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Jell wrote:
Hank just released his version of protected NCR18650B~
http://www.intl-outdoor.com/2-pcs-panasonic-ncr18650b-3400mah-protected-...

That price is very good, considering how low internal resistance Intl-Outdoor’s protection circuits have
To see what I mean, here’s for comparison, IOS vs Xtar, same cell:
RedForest UK
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Intl-outdoor are keeppower OEM too I think, so they should be the same as the ones at cnqg.

Shadowww
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Who knows Silly they both have great reputation, and price difference is negligible, so it’s a matter of button top (Keeppower) vs raised top (Intl-Outdoor Store) I guess.

baterija
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Woody wrote:
Apparently the problem is that the restrictions on li-ions are being rigorously enforced at the moment, prior to a big Chinese government meeting later in the month. I assume this is to do with the formation of the new government next month.

They did that when they hosted the Olympics too IIRC.

CM2010
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Got a few from cnq shipped yesterday hopefully they'll make it through.

KumaBear
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Hi!

 

I had done a lot of research on “button top” vs “raised top” and even got in touch with HKJ to see what he recommended.  His answer was clear and unequivocal.  It appears that some high-end flashlights cannot be used with the broader “raised top” and the “button tops” are not only compact but they do make good contact with any good spring as long as there is the normal amount of pressure.

 

I hope this helps.

 

Regards,

Bob

KumaBear

Shadowww
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Raised tops are more mechanically robust though.

SpaceCowboy
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Shadowww wrote:
Raised tops are more mechanically robust though.

Very true.

Hikelite
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SpaceCowboy wrote:
Shadowww wrote:
Raised tops are more mechanically robust though.
Very true.

I also like them, especially in series where the cells are end to top.  

spaceboy
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Hikelite wrote:

SpaceCowboy wrote:
Shadowww wrote:
Raised tops are more mechanically robust though.
Very true.

I also like them, especially in series where the cells are end to top.  

Surely button top are better for that?

Anzycpethian
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Do these fit into the Skyray King or any Nitecore Tiny Monster? Experience anyone?

"Do not Weep. I shall draw all Things which perish into myself When I am lifted from the Earth." ~ Begotten (1991)

Anzycpethian
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Just for the record, confirmed by my experience:

DO NOT FIT IN ZEBRALIGHT SC600

DO FIT IN SKYRAY KING MIMIC
DO FIT IN ULTRAFIRE SH98 (SIPIK 98 CLONE)
DO FIT IN TN31

"Do not Weep. I shall draw all Things which perish into myself When I am lifted from the Earth." ~ Begotten (1991)

gavrook
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Anzycpethian wrote:
Do these fit into the Skyray King or any Nitecore Tiny Monster? Experience anyone?

Fit fine in the TM26 and should fit easily in the SRK considering my longer Panasonic’s fit

RaceR86
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How would these cells (Panasonic NCR18650B in general) handle 10A drain?

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NightCrawl
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Very bad. They will get hot and well, you dont want hot LiIon cells.

RaceR86
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So whats the point of having the protection as high as 11,5A?

Most cells can do 2C right? (??) So 6,8A should be ok, and pushing the limits a bit higher would probably not be that bad (despite decreasing battery life)? Or am I off now? (I know 1C is what is really recommended).

I know mountain electronics have protected PF (Orbtronic), but protection kicks in around 6,5A...

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HKJ
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RaceR86 wrote:
So whats the point of having the protection as high as 11,5A?

A couple of years ago the extra current was necessary due to incan bulbs (They require a high starting current).

Today you get slightly higher voltage at high current. You can usual expect about 0.1 volt drop over the protection, before it trips.

I.e. a 12A protection will have 0.1 volt drop at 12A or 0.05 volt drop at 6A

A 6A protection will have 0.1 volt drop at 6A, i.e. it will have 0.05 volt lower output voltage.

For most people this difference does not really matter, but there are some people around here that want everything they can get from the batteries.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

RaceR86
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Thanks for the explanation HKJ.

What are your thoughts on 8A continuous drain from one of these cells?

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HKJ
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RaceR86 wrote:
What are your thoughts on 8A continuous drain from one of these cells?

I prefer to keep them well under 2C and use high current cells for 8A (I.e. NCR18650PF).

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

RaceR86
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My intl-outdoor 2900mAh (PD) Protected cells probably have around 11,5A trip current, but those cells are not available anymore. (And they were pretty expensive). I am not aware of any of the newer PF cells with protection at 8A++.

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

ri chevy
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NightCrawl
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ri chevy wrote:
http://www.e2fieldgear.com/panasonic-2900-mah-18650-high-drain-li-ion-ba... States they are good for 10A drains.

But those are unprotected. Enerpower has some 3C 2900mAh cells.. HKJ also tested those. 

ri chevy
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OK. I thought he was looking for genuine Panasonic PF cells.

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