Accupower Evolution vs. MAHA Powerex "D" batteries???
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The Accupower 10,000's are LSD (Low Self Discharge) type batteries. I would definitely get those over the slightly higher (11,500mAh others) regular NiMh batteries. Also, they are actually the same price or cheaper than the regular NIMh D cells at the site I was looking at.
The regular NIMh batteries will quickly lose that extra 1,500 mAh of capacity due to self discharge....probably overnight.
The regular NIMh batteries will quickly lose that extra 1,500 mAh of capacity due to self discharge....probably overnight.
My only complaint with the Accupower D's is that the bottom (negative) end of the battery is weak and the "tit" on the positive end pushes them in while installed in the light. This was with a cut down M@g spring as well.
I expected such an expensive battery to be made a little more sturdy than that. Probably won't be buying any more and will stick with AA's (Eneloops).
I expected such an expensive battery to be made a little more sturdy than that. Probably won't be buying any more and will stick with AA's (Eneloops).
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etc
Flashlight Enthusiast
I haven't seen that but I will pay more attention.
etc
Flashlight Enthusiast
Now that you show it, mine look exactly the same way. I looked at CTA ones and they also look just like that. My guess is, it hurts nothing.
NotBrightNuf
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I read nimh battery shoot out posted by silverfox. He tested an accupower 11500mAh and it can handle a 10 amp draw pretty well staying just under 1.2v. Im not sure if the same goes for the lsd version of the accupower d cell.
shredmandan
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You might want to look at the Tenergy "PREMIUM" Nimh batteries - after extensive research on the web these seem to be the best rechargeable D cells on the market at present (BEST BANG FOR THE BUCK). Tenergy also makes another D cell battery that is NOT labeled "PREMIUM" for about the same money but I don't think quite as good (perhaps and older version) - I would go for the "PREMIUMS".
StorminMatt
Flashlight Enthusiast
Tenergy actually makes three D cells: the blue ones (10000mAH HSD), the Premium cells (10000mAH HSD), and the Centuras (8000mAH LSD).
I just picked up a pair of the D cells maybe a week ago as part of my push to get rid of all alkaline cells in my house. One thing you should know is that at least the ones I got came about 20-25% charged, not the 70-75% that I've come to expect from Eneloops. However, they appeared to have full capacity per the break-in cycle on my C9000, although they did not discharge at 0.2C but at 1A as that is the maximum discharge current of the C9000. I am actually only using one of the cells (my old Simpson meter takes a D-cell and a 9V battery) so I put the other one away and will try to remember to discharge it in a few months to give a report on its self-discharge rate, as I haven't seen a live test of it. Yes, I know, it's a sample size of one, but it's what I can do.
I noticed similar behavior on the C cells that I bought at the same time; low charge out of the package but they charged to over rated capacity. I also bought some 9V ones and they stayed on a Maha 9V charger for maybe an hour or so before I got a green light. (I obviously don't have a smart charger that will give me reported capacity for a 8.4V "9V" battery, because if one exists, I haven't seen it!) Assuming that I don't need to use the flashlight that the Cs are in over the next few months I'll discharge those as well.
In Tenergy's defense, the Centura is advertised as low self discharge but not as ready to use or precharged, so I'm hoping that this is normal, I won't be worried unless/until I test them again and get bad news.
The good news is that all of my meters (Simpson 260 Series 7M, Fluke 87, and some older Fluke as a backup) seemed to be OK with the Centura batteries - especially since two out of four (the D cell and one 9V) were either leaking or bulging, not what I like to see in my expensive equipment!
I have read that Accupower cells used to be good but now, not so much. I have no personal experience with them.
Edit: wow, looks like we're responding to a thread necro, but still, this topic is of interest to me so I assume that it may be of interest to others.
I noticed similar behavior on the C cells that I bought at the same time; low charge out of the package but they charged to over rated capacity. I also bought some 9V ones and they stayed on a Maha 9V charger for maybe an hour or so before I got a green light. (I obviously don't have a smart charger that will give me reported capacity for a 8.4V "9V" battery, because if one exists, I haven't seen it!) Assuming that I don't need to use the flashlight that the Cs are in over the next few months I'll discharge those as well.
In Tenergy's defense, the Centura is advertised as low self discharge but not as ready to use or precharged, so I'm hoping that this is normal, I won't be worried unless/until I test them again and get bad news.
The good news is that all of my meters (Simpson 260 Series 7M, Fluke 87, and some older Fluke as a backup) seemed to be OK with the Centura batteries - especially since two out of four (the D cell and one 9V) were either leaking or bulging, not what I like to see in my expensive equipment!
I have read that Accupower cells used to be good but now, not so much. I have no personal experience with them.
Edit: wow, looks like we're responding to a thread necro, but still, this topic is of interest to me so I assume that it may be of interest to others.
Well, this isn't promising... pulled out the one D cell (Tenergy Centura) that I wasn't using, marked "9/11/13 8067 mAh"
It's been discharging for about 30 minutes and already is at 1.11V...
I'll let you know how it's doing when it's discharged. I also can discharge two Cs that are in an unused flashlight, but it was switched on a few times (for a few seconds) to make sure it worked.
Edit: it's done... 7160 mAh. So apparently the low voltage (discharging at 1000 mA, the max of a C9000) didn't keep it from giving lots of energy.
7160/8067 = 88.8% capacity retained after one month of sitting.
I'll charge it back up and check in after another three months if I haven't used it...
It's been discharging for about 30 minutes and already is at 1.11V...
I'll let you know how it's doing when it's discharged. I also can discharge two Cs that are in an unused flashlight, but it was switched on a few times (for a few seconds) to make sure it worked.
Edit: it's done... 7160 mAh. So apparently the low voltage (discharging at 1000 mA, the max of a C9000) didn't keep it from giving lots of energy.
7160/8067 = 88.8% capacity retained after one month of sitting.
I'll charge it back up and check in after another three months if I haven't used it...
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