The BLF Battery Data Base

Ok , just arrived from Tasmania ... Vapex AAA LSD [ 80% capacity after 6 months - 70% capacity after 12 months ]

950mAh Typical , 900mAh Minimum capacity .

Normal charge = 15hrs @ 95mA , rapid charge 1700mA .

Cells were purchased off Ebay ...

Currently discharging straight from the packet ... @ 0.5A

Results are in :

1/ 432mAh @ 0.5A [ straight from the packet ] or 45%

2/ 342mAh = 36%

3/ 187mAh = 20%

4/ 330mAh = 35% retained charge ...

Well , thats all over the place , I might guess , A- old stock maybe , B-not so flash batts , C-counterfeit ? possibly .

Anyhow , early days .. Time to charge and discharge then charge again ...

Ok discharged @ 0.5A from being fully charged @ 0.5A

1/ 887mAh = 93.4%

2/ 899mAh = 94.7%

3/ 905mAh = 95.3%

4/ 898mAh = 94.6%

% is of the claimed 950mAh capacity ...

My maha is on its way so I will be able to contribute soon.

Ill see if i can get my HobbyKing LSD 2200mA cells tested. Ive had them for between 2-5 months and used them on my D10 torches, which pull about 2A on max, which I use about half the time. The cells range from having 2-10 discharge cycles on them.

I charge my cells on a Varta AA USB/12v charger which charges at 0.6-1A per cell in 1 or 2 pairs respectively. I will try to do a discharge and charge cycle at 1A on my icharger106+ and post my results.

So far unscientifically, the runtimes on these cells have been very impressive, especially when the cost of the cells are considered. I think it works out to be about $2 a cell shipped

PS... What voltages do we discharge to, im discharging my NiMh now, but where do i stop.

Ok 1 cell Discharged -

Cell was purchased December 2010, arrived Jan 2011. So far this is cycle number 2 on the cell ( I think)

Charged on Varta charger about 2 days prior.

Discharged at 1.0A on icharger, cutoff set to 0.7v

Capacity measured 2150mA , Time 2:07

Cell was barely warm (not a scientific measurement)

Floating voltage immediately after discharge termination back to 1.00v within 10 seconds, 1.20v within a couple minutes.

Subjective monitoring of the voltage showed a relatively flat discharge curve, holding 1.2 initially, dropping to 1.1v by 1000ma, holding 1.1v to about 2000ma, dropping to 1.0 by 2100ma, and rapidly falling below 0.9v by 2130ma and cease charge at 2150ma. This appears to be a very well maintained discharge curve, which in a practical application of my D10 torches means I barely get any warning of a flat battery.

Heres a link for the battery

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=10456

If enough of us want to buy it, make a swarm, gets cheaper too.

Termination voltage ? I think the Mh C9000 terminates @ 0.8v not sure , I havent seen it go lower than 0.9v ...

Convention says 0.9V - AFAIR that is what Maha set it at. My Angeleyes devices stop at 1.0V - I doubt the difference is significant.

Well As you have both said, and according to the discharge plot of the NiMh, its not all that relevant as at 1.0v practically most of the capacity burned up anyway. I found the significant voltage drop to occur after 1.1 to 1.0v, so a cutoff at 0.9v should cover the capacity of the cell.

They look interesting , but shipping kills the deal ... Great for pick up ...

Please include dimensions of the battery and I will include your results .

Thank you

My brother got these , so Im borrowing them to test em .

850mAh Capacity and 85% after 12 months .. Just discharging them out of the pack ATM @ 0.5A

Discharged @ 0.5A straight from the packet

1/ 664mAh - 78% of claimed capacity

2/ 673mAh - 79%

3/ 677mAh - 79.5%

4/ 681mAh - 80%

Ok , 0.5A charge followed by a 0.5A discharge

1/ 774mAh = 91%

2/ 793mAh = 93%

3/ 790mAh = 93%

4/ 804mAh = 94.5% of claimed capacity

Can you recharge them and test again please? I have the same ones in my mouse and I am really interested in their full capacity. I also got 5 pack of AAA Turnigy from hobbycity, which where half the price of GP recyko+, but I suspect they are pretty much the same in capacity and self discharge...

Standard AA or AAA procedure will be to test capacity straight from the packet with a ? discharge , then charge @ ? , rest , and discharge again @ ? to test charged capacity .

Since this is a flashlight forum , I dont want to discharge them at a lower rate as most lights on high will draw much higher current .

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 ?