Wow that's good news! Maybe the other user had a problem with one of his batteries and that's why they didn't work.
Could you perhaps try a runtime test with your TK70 on turbo mode and see how long it takes until the protection circuits kick in and the light turns off? You could submerge half the TK70 in cool water or something so the light doesn't get very hot. THat's what I've done with all my Fenix lights when doing runtime tests on my Eneloop and Imedion AAs, and 18650s. The lights are cool to the touch in the water once the light kicks down to a lesser mode.
If you actually get about an hour runtime on the Novae batteries I'll pull the trigger for a TK70 and those batteries ASAP. I'll have to make an adapter to charge the Novae 32650s in my PIla IBC charger.
I put Imedion cells from Lighthound in my TK70 after using some old, cheap rechargeables. The Imedion cells are wonderful. They last a long time, and they don't lose much energy after storing them for awhile. The Imedion cells brought new life to my TK70. It's a new light again. I use a Maha charger.
But I REALLY want a shorter, lighter flashlight. Plus I would only have to pay for the batteries since I can fabricate adapters to get them working in my Pila IBC.
If I go the D cell route, and plus a charger, it's going to be more expensive, and the flashlight will be heavier and longer.
This is a super deal and super hard to pass up.. he has 81 of them left (show 81 sets of 8)... He also has another auction with 4 for 15.00 in case you dont need 8
Also posting in the good deals section
If this isnt allowed I apologize in advance and please remove the link
So these are not LSD. I wonder how long the cells will have a charge until dead? If I charge them in early March should I expect them to be completely depleted in early April? I don't want to charge them each month just to keep them from being empty (which damages the cell, correct?)
Just bought a quantity of 2 (16 total batteries). First I went online and found the Tenergy data sheet of the batteries. They are supposed to have 65% or more charge remaining after one year, stored at 20C. That's LSD enough for me. Ever six months I do the "conditioning mode" for my LSD AA and AAA batteries anyway. That is an insane price!
I bought 16 of them too and have been performing discharge tests as a way of cycling the batteries. They seem to be averaging between 7500 - 8100mah. They might improve some but I'm pretty happy with these cells. They rival the Tenergy Premiums for maintaining voltage under a load.
Capacity doesn't hardly seem affected whether discharging at 2amps, 3amps or 5amps.
I recently let some Premium cells sit for just over 6 weeks. The static voltage measured right around 1.3v which was the lowest of the cells I tested (all others were LSD). The Premiums had only lost about 100mah each from freshly charged tests, about the same as the LSD cells. Best part was they easily beat all other cells in maintaining a higher voltage under load even the Centuras (second best).
Hopefully these cells perform in a similiar manner.
I have some setting charged on the shelf at the moment and will test them in 6 weeks or so.
Thanks for doing all these tests 357mag1. So the ones that I (and you) just bought are actually just an 8,000 mah battery or less on average? I was expecting more. The Tenergy data sheet says min capacity is 9000 mah. You mentioned though that under load they rival the Tenergy Premiums. Under what load specifically? I will now be purchasing the Fenix TK70. So that will be the "load" that all four of these batteries (in a series) will experience. Which is quite a lot I think. Do you have any tests of the capacites under a load like that?
I have purchased at least 32 of these, 16 of which have made it here and are working just fine, the other 16 are in the mail...
Yes it is.. these are about 10 bucks each from the normal suppliers..Just bought a quantity of 2 (16 total batteries). First I went online and found the Tenergy data sheet of the batteries. They are supposed to have 65% or more charge remaining after one year, stored at 20C. That's LSD enough for me. Ever six months I do the "conditioning mode" for my LSD AA and AAA batteries anyway. That is an insane price!
I have bought from this guy before, he is a liquidator, so once these are gone he wont get anymore.. (at least previous experiences with him anyways)
The highest discharge rate I can do is 5amps (Not on the Triton). I've only done a couple of the Premiums and these Standard (Blue) batteries at that rate and so far the Standard batteries seem to be holding right with the Premiums.
Tailcap current with 4 Premium D cells is right at 6.4amps in my TK70s so you should get over an hour of runtime.
Last edited by 357mag1; 02-12-2012 at 06:33 AM.
The Tenergy datasheet says to charge their D cell at 1 amp for 16 hours. Isn't that the "soft charge" mode of the Maha MH-C808M charge at 1 amp? And the regular charge at 2 amp? I thought I read somewhere else on this forum (maybe the TK70 thread) that someone said to use the 2 amp charge for D cells, not the 1 amp charge. ANy thoughts?
I've noticed a couple 10,000mAh NiMH D cell manufactures recommend about 1A for 16 hours as the standard charge rate, and 2A for 7 hours for fast charging. Tenergy recommend 950mA for 16 hours as standard and 1.9A for 7 hours as fast charge. I would be reluctant to charge those cells at 5A. I'm thinking that because of the relatively small surface area with respect to the capacity of these NiMH D cells they can't dissipate heat as well as AA or AAA cells and the 0.5C charge rate may be too high.
So it is perfectly fine to charge these D cells in the Maha MH-C808M at the standard rate (2,000 mah) instead of the "soft" mode (1,000 mah)?
I'm thinking of maybe doing two "conditioning" modes per D cell battery in the MH-C808M (to break them in) and then doing a discharge test on my MH-C9000 with modified adapters to charge D-cells. I'm not sure what the maximum discharge rate is for the C9000. That should tell me the capacity of each cell, correct?
I'm puzzled looking Tenergy's products page:
http://www.tenergy.com/Site/D-NiMH are their button top consumer cells.
Are the blue button top 10,000mah D cells with the big lower case "e" on them an older design, or am I missing something?
Last edited by hank; 02-12-2012 at 05:44 PM.
Great thread. I was wondering about D cells too.
I would definitely condition them at least once and twice would probably be better if you have the time.
The C9000 has a max discharge rate of 1amp and yes it should give you the capacity.
Also, doing two "conditioning mode" cycles for each battery won't be harmful to the battery, will it?
Does the 808M cycle when I insert a battery (charge if needed, then discharge, charge) or does it just charge until the battery is fully charged? I want to do some cycling.
Last edited by CyberCT; 02-12-2012 at 07:43 PM.
Best for batteries when conditioning to use a slow charge and discharge. 2000mah AAs take over 30 hours on the C9000 if I remember correctly.
If you are gettiing 16 cells mark each cell and charge them all. Throw 12 of them, 4 at a time in the TK70 and play around with it for 15 minutes with each set. Charge those twelve up again and start the slow conditioning cycle on the other 4. That should keep you in power until they complete. Then repeat the process until you have conditioned them all.
I just bought one too. Hopefully this charger, the batteries, and the TK70 will arrive this week.
uh, oh: an earlier CPF thread:
"Maha MH-C808M Charger Melted! What Now??
When I was researching this charger, I found two reviews about it catching on fire..."
One of them with Tenergy 10,000 NiMH D cells.
Of course there's always going to be one or two problems out of tens of thousands.