So I saw this
http://www.batteryshowdown.com/index.html
And thought its quite interesting.
So I saw this
http://www.batteryshowdown.com/index.html
And thought its quite interesting.
throw new ArgumentException (String, String, Exception)
Yeah, kind of falls into expected behaviour though. Do they explain anywhere why they give the same batteries different costs between the two sets of results (GP ultra for eg?)
kalniel (20-09-2012)
Very interesting, thank you for sharing it with the community. Particularly good was the methodology giving a repeatable set of test results.
However, my own view is that it re-enforces the case for rechargeable Li-Ion cells, and I have switched to the new generation of low self discharge Li-ion batteries (Sanyo Eneloop, Varta Hybrio and similar) for nearly all applications needing AA or AAA batteries. The only area where I can see justification for standard single use cells is where the equipment is particularly voltage sensitive.
As other have said, it would be interesting to see similar tests on those types of battery.
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Rechargeable batteries....
So whilst you can buy some fancy 2800mah ones, the issue often is voltage. As the power left in the battery decreases, so does the voltage output. As rechargeable are lower voltage than dry cells to begin with, this is a big problem, and often the rechargables still have plenty of power left inside them, just the voltage they output is so low, the electronics decide the cell is flat.
throw new ArgumentException (String, String, Exception)
Some time ago I did find a good review of lots of rechargeables AA batteries, I was surprised how many of them never charged to the printed capacity too.
I have a Technoline charger and some of the fujicell 2800mAh cells only charged to around 1800-1900 after several full drain recharge cycles.
Phone batteries would be a good one, mainly for the 3rd party replacements with ridiculous capacity claims. Get some real numbers to compare when buying.
VodkaOriginally Posted by Ephesians
Yes, my bad - a senior moment - yes, Ni-MH
True, NI-MH (and NiCd) have a terminal voltage of about 1.2 volts, as opposed to Alkaline cells that are 1.5. The discharge characteristics are fairly flat though, which helps, but ideally, the equipment needs to designed to run off the lower voltage, or has to be bigger to accommodate extra cells (5 Ni-MH cells in series gives 6 Volts.
The highest capacity Eneloops (and similar) are about 2000mAh in AA size, but because of the better self discharge performance, they are better (in many applications) than higher capacity 'normal' cells. All my remote controls have low self discharge batteries in them, I charge routinely every six months or so. Thee lower voltage doesn't seem to matter with them. I also use them in my flashgun, which works quite happily at 4.8V.
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Interesting, thanks for sharing. I will pick up some Kirkland (Costco) alkalines next time I am in store, they look to be a good all rounder.
For most of the kids stuff I use rechargables (just cheap ones from 7dayshop) and they seem fine.
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