brad
March 9, 2013, 11:51pm
21
But Shirley you don’t mean….
Woody
March 10, 2013, 1:34am
22
Thanks for this Marc - just ordered a pack for the E25AW I’m waiting for from Fasttech.
I won’t be able to test them though, as I’ll be giving it to a nephew, so hopefully he’ll have a decent charger. Makes more sense than lithium primary cells, and cheaper too.
Boaz
March 10, 2013, 10:39am
24
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Go inside the battery and see if they accept you for who you are ...
if not I'd consider that resistance and I'd just stay outta there .
Nobody ought to put up with that infernal internal resistance
Bort
March 11, 2013, 9:00am
25
Boaz:
Go inside the battery and see if they accept you for who you are …
if not I’d consider that resistance and I’d just stay outta there .
Nobody ought to put up with that infernal internal resistance
what if the battery has had a hard life and the internal resistance is an emotional defense mechanism?
Don
March 11, 2013, 9:14am
26
marcl:
How do I do that Bort?
Marc
http://www.revisesmart.co.uk/physics/sensing/emf-and-internal-resistance.html
Straightforward enough to be worth giving it a go.
marcl
March 11, 2013, 9:53am
27
I think I will leave that to ‘The Don’. I encounter far to much resistance in this house without adding to it!
Marc.
ChibiM
March 11, 2013, 12:54pm
29
Wow… thats really cheap!
Now waiting for some more tests…
by the way… the venting holes were changed in the 1st generation already, if my memory is serving me well.
Don
March 11, 2013, 12:57pm
30
I’ll get some detailed pics once they arrive.
marcl
March 11, 2013, 4:53pm
31
ChibiM:
Wow… thats really cheap!
Now waiting for some more tests…
by the way… the venting holes were changed in the 1st generation already, if my memory is serving me well.
The first gen had vent holes, the second didn’t. Contours don’t. The Contours also say 1500 cycles.
Marc.
Chloe
March 12, 2013, 2:22am
32
Sounds like they really are 2nd gen! Looking forward to the results of your tests and photos!
Chloe
March 12, 2013, 2:45am
33
This might be of interest, from their site :
The company’s world-class executive management team is comprised of a “Who’s Who” of decorated battery industry veterans and research specialists. This includes co-founder Dr. Robert Grubbs, a Nobel Laureate in Chemistry with Caltech, as well as leading executives from Energizer , General Electric, Hewlett-Packard, Sanyo , and Valence Technologies. Collectively, this executive leadership team provides Contour with significant competitive advantages through its critical experience in transitioning technological developments into commercially successful products.
And from their FAQ :
What kind of primary lithium and advanced rechargeable batteries is Contour Energy Systems developing? What form factors is company producing?
Contour Energy Systems is developing primary lithium batteries using a lithium and carbon fluoride couple. Our products provide next generation performance in the areas of energy and power density, temperature range, and robustness versus other lithium-based systems. For our standard products, we will be producing coin, cylindrical, and thin film prismatic formats. Additionally, we will be placing these cells into standard and custom battery packs based on the specifications of our OEM customer base.
12. Is Contour manufacturing its own products, OEMing its technology and/or licensing its IP? Why does Contour believe this strategy will be successful?
Contour is open to all of these business options. What is important about our strategy is that we fully understand the customer needs prior to selecting a commercialization option. This understanding of market performance and pricing requirements guides the development of our technologies. We then select the best commercialization option that will add value for both the customer and our company. This differentiates us from other emerging companies in the battery and portable power space.
So, do they OEM for Sanyo and Energizer?
ChibiM
March 12, 2013, 1:32pm
34
Second generation still had venting holes.. until they changed that during in 2010. so, without the venting holes, they surely aren`t first generation.
Edit; I updated this info in my Eneloop overview thread as well.
Don
March 16, 2013, 5:08pm
35
Not even opened their packaging yet, but I’ll get to it tonight. I really don’t need any more AAs so long-term testing is on the cards.
All discharges will be at 550mA because that’s what my two chargers do. Likewise discharge to 1.0V is what they do.
Charging I’ll do at an amp in a Maha C800 - which can do 8 at a time which is fine as I can only discharge 8 at a time.
Initial voltage ought to get done for each one too. They ought to be pretty consistent if they are rebadged Eneloops.
Photos to come as well.
Chloe
March 16, 2013, 5:38pm
36
Yay, looking forward to it! :party:
I’m also in the market for some non-eneloops. I like eneloops just fine, just want some other batteries so I have something to compare :). I was thinking Tenergy 2400mAh LSDs but these might do.
Don
March 16, 2013, 8:24pm
38
They sure look like Gen. 2 Eneloops to me. See here for details.
Don
March 16, 2013, 9:28pm
39
ChibiM:
Second generation still had venting holes… until they changed that during in 2010. so, without the venting holes, they surely aren`t first generation.
Edit; I updated this info in my Eneloop overview thread as well.
The packaging of these cells says copyright 2011
So presumably they’d be later 2nd generation ones. My early 2G Tones do have vent holes. The manufacture date on their packaging says 2010-03
