The BLF Battery Data Base

A pair of those cheap AAA Chinese [ VIA HK ] batteries showed up today ..

Hmmmm , so how bad are they .....

1/ 358mAh discharged @ 0.5A after being charged ..

2/ 314mAh discharged @ 0.5A after being charged ..

Thats less than half the capacity of most brand name cells ...

I will pop them in a remote and see if they have any longevity at all , I cant see anyone wanting to use these in a flashlight ...

Maybe its just a typo and they meant 350mah. (lol)

You mean they meant One 350mAh and they put on 1350mAh ...

LOL! and the 1 is spaced out further from the other numbers too!!!

Regarding the Turnigy AA NiMH I was testing, Im now away on a rural clincal placement and I dont have the tools to provide measurements for another 2 weeks. If I find the time, ill organise more battery tests on the few cells I took with me.

So far, Im very impressed with the cells, and the shipping isnt too bad for me.. but for cells alone, and maybe compared to other budget places, maybe not so cheap, however I do feel safe ordering from Hobbyking, which is where all my model plane stuff come from. Got the icharger from there too! There is a discount if you open the page for an item, and leave it open for at least 5 mins without closing it, for the first time for that IP address I think?

Owen

Superfire 18650 with protection circuit .

Claimed capacity 2600mAh ...

Wow , ok I dont know what to say , I ran it through twice since the results were So Bad !

759mAh @ 1A discharge

855mAh @ 0.5A discharge

Ok , was I testing a 18650 ?

2nd Cell = 946mAh @ 0.5A discharge

data base 18650 please,old 4570,gracias.

Oh dear, that really is quite impressivly bad.

Is it suspiciously light weight or anything?

Testing the other cell now ..

these go 1.49oz VS 1.67oz for a ultrafire , so weight wise ? not really suspicious ...

As soon as the second one has discharged , so I can confirm ...

Just saw these:

http://www.tmart.com/2pcs-LC-18650-2400mAh-Gray-Charge-Batteries-with-Fender-Apron_p105734.html

Anyone want to be a guinea pig? Looks like protected.

There deff on the cheap side !

But I just spent $130 on a text book , and one would expect more such surprises as the days go bye ..

Geez these folks should have had a book list available last year , so I could source the books from the cheapest vendor rather than get ripped .

Bying books after schools starts ... Yeah doing a IT course this year , as my back is worn out from being a human forklift .

Geez these folk did not have there act together at all , this last minute stuff is realy pissing me off .

Just wondering how much more expensive today is going to get ?

Sent to me by Forum member Noodles , one white Trustfire 16340 ..

Picture hosted by : http://wwww.imageshack.us

I charged the cell to 4.2v , and then discharged it for all of 53mAh , thats right , 53mAh capacity ! @ 0.5A discharge

I think I can understand why Noodles was not impressed . Im charging the cell ATM to see how much goes in , since it took so long to discharge .

Wow , @ 0.5A charge rate which never held , it started @ 0.4A and very quickly went to 0.1A but before I could even finish this post its done , charged all of 52mAh ..

Im going to toss this one , it could be dangerous , this is a very bad cell ..

Thank you Noodles ! for bringing this to our attention !

Just to check , I ran a AW through , and got 578mAh [ 2 years old and maybe some ]

And that Trustfire seems to be getting worse every time I charge / discharge it ...

Thanks old, that package got to you pretty quickly!

these cells only had a few reviews on DX ( sku11670), but I went ahead and ordered some anyway. They all perform about the same as the test cell, so they will get tossed.

I need to get a hobby charger to start profiling all the cells I have.

Im going to run it a few times more , as it def did a better job in a flashlight ..

But yeah , nothing flash ..

I got my maha c9000 today, tested some brand new maxuss aaa, claimed mah 1250. Didnt know what I was doing and only set one battery on refresh analyse. Other 3 charged.

Im charging/ discharging now at 500 mah.

results

1. 632 MAH

2. 632 MAH

3. 582 MAH

4. 618 MAH

Disappointing as claimed capacity 1250. Another dx scam.

Could be they're not rechargeables? "Warning: Battery may explode or leak if recharged"

(but the battery cover says "do not ... charge improperly", so probably just tmart's fault)

And thanks for all the hard work! A really good project.

great news got my accucell 6 in the mail, and tested it on a 12V lead acid battery i thought was dead.

it was charging on its own charger in less than an hour, and was dead in 20 mins (35watt HID was the draw)

after using the accucell 6 to drain it completely (at 1 amp) and recharge it completely, i was able to milk about 2.5 Ah out of the OLD 4.5AH battery it was

good enough for HID use now!

saved me 20 bux for the time being!

now, i shall due some serious testing with batteries, after looking at the list, i see we dont have the Old Sanyo Ni-mh, energizer ni-mh, nor powergenix Ni-zn.

so those will be my first submissions (will do on wednesday, its my day off lol)

also have the trustfire 18650 flames, 14500 and rcr123's.

can someone suggest a battery holder that may plug into the wiring provided for my charger?

It's a bit hard finding 18650 holders. I got these,

http://www.virtualvillage.co.uk/5-x-rechargeable-18650-3-7v-lithium-battery-case-holder-006310-012.html

but they are a bit on the long side - I need to stick a 2mm thick magnet on the end of each 18650 to get reliable contact.

If you want to balance charge you need to make up a balancing harness as well - the simplest way is to buy a balancing lead extension and cut off the female end. I 5think i got my cables from eBay but HobbyKing probably have them.

Or here if shipping to states gets awful.

Link please , to the batteries on DX ... thank you ,

http://www.dealextreme.com/p/maxuss-ni-mh-aaa-1-2v-1250mah-batteries-4-pack-10730 These ?

Same company I think. Though I think mine were posted in the UK - they certainly arrived much faster than most HK stuff