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Energizer rechargeable batteries 1hr AA/AAA plus Charger @Costco (in-store) $13+tax

$13.00
$35.97
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***couldn't find a link to Costco.com so including a link to Amazon instead. May be in store only. Found at my local Santa Clarita, CA location. Costco item includes 10 batteries (6x AA and 4x AAA) ***


Item# 1592085 Energizer AA AAA Rechargeable NiMH Battery Kit w/ Charger @Costco In-Store Only $22.99 - $10 instant rebate =$12.99

Rebate valid until 12/10/21



https://www.amazon.com/Energizer-...g&hvrand=1

Costco store locations: https://www.costco.com/warehouse-locations
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Energizer rechargeable batteries 1hr AA/AAA plus Charger @Costco (in-store) $13+tax
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Joined Nov 2014
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> bubble2 13 Posts
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Slickflo
12-06-2021 at 06:55 AM.
12-06-2021 at 06:55 AM.
Are these low self discharge? I bought a few but I don't see anything stating they are LSD. May have to return them.
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> bubble2 1,339 Posts
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bcm00re
12-06-2021 at 07:04 PM.
12-06-2021 at 07:04 PM.
Quote from Commentary :
Question - If one put fully charged batteries in flashlights, will they drain over time if not used. If yes, any one have a guess as to how long before fully drained?
That depends on several factors. One is the flashlight; some have electronic switches and those can (but don't always) have parasitic drain. If your flashlight has a mechanical switch (and therefore no drain issues) and these are LSD batteries, then I'd say you could probably get by charging the batteries just once a year -- or worst case twice a year. Unlike the packaging on the Energizers I purchased from Costco in 2019 and 2020, these don't say anything about being LSD or coming precharged. That said they are made in Japan and there is only one factory there making NiMH batteries -- and as far as I know everything they make has been LSD. And they make high capacity batteries (2400mA give or take 100mA) that are LSD; the downside of those is usually that you get fewer recharges over the life of the battery compared lower-capacity (1900-2000mA) cells.
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> bubble2 4,404 Posts
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Commentary
12-06-2021 at 07:45 PM.
12-06-2021 at 07:45 PM.
Quote from bcm00re :
That depends on several factors. One is the flashlight; some have electronic switches and those can (but don't always) have parasitic drain. If your flashlight has a mechanical switch (and therefore no drain issues) and these are LSD batteries, then I'd say you could probably get by charging the batteries just once a year -- or worst case twice a year. Unlike the packaging on the Energizers I purchased from Costco in 2019 and 2020, these don't say anything about being LSD or coming precharged. That said they are made in Japan and there is only one factory there making NiMH batteries -- and as far as I know everything they make has been LSD. And they make high capacity batteries (2400mA give or take 100mA) that are LSD; the downside of those is usually that you get fewer recharges over the life of the battery compared lower-capacity (1900-2000mA) cells.
Thanks for the reply.

Is there a limit to how many times these batteries can be recharged before they are no longer functional?
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> bubble2 1,339 Posts
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bcm00re
12-06-2021 at 10:05 PM.
12-06-2021 at 10:05 PM.
Quote from Commentary :
Thanks for the reply.

Is there a limit to how many times these batteries can be recharged before they are no longer functional?
I'd say around 500 cycles for 2400ish AA cells while around 1000 cycles for 2000ish AA cells. Usually batteries don't just die, they just lose capacity over time and their internal resistance usually increases too.
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Last edited by bcm00re December 6, 2021 at 10:08 PM.
Joined Jul 2006
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> bubble2 4,404 Posts
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Commentary
12-06-2021 at 10:07 PM.
12-06-2021 at 10:07 PM.
Quote from bcm00re :
I'd say around 500 cycles for 2400ish AA cells while around 1000 cycles for 2000ish AA cells.
Well - that's probably more cycles than I will ever recharge in my lifetime.

Thanks again for the responses.
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> bubble2 1,339 Posts
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bcm00re
12-06-2021 at 10:44 PM.
12-06-2021 at 10:44 PM.
To be clear those numbers came from what Eneloop claims (as those batteries as well as these Energizers are made at the same factory).
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Joined Nov 2015
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> bubble2 488 Posts
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ards
12-07-2021 at 07:32 PM.
12-07-2021 at 07:32 PM.
I've been using a 1 hour charger to charge batteries, including Ikea batteries, for over 15+ years. Never had an issue with batteries failing prematurely. I have used this included charger and am quite happy with it and am not concerned about the heat. To be honest didn't even notice any heat beyond what I would consider warm. You want to feel how hot a battery can get during charging? Try a 15 minute charger. I can understand the nay sayers cautioning about using a 15 min charger, but a 1 hour charger is a good comprise that in most cases will not harm the life of the battery.
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Joined Jul 2008
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> bubble2 64 Posts
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mm1515
12-08-2021 at 08:14 AM.
12-08-2021 at 08:14 AM.
After buying these, I now have too many AAA batteries. Thinking of buying adapters to convert the AAA's to AA size and use in the low-current devices like remote controls. Not sure which adapters are good value though.
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> bubble2 3,695 Posts
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budster
12-08-2021 at 12:31 PM.
12-08-2021 at 12:31 PM.
The charger that comes in the kit is kind of trash and shouldn't normally be used. As other have mentioned, it charges at way too high of a current rate and will decrease the lifespan of the battery. In case the battery runs out, most people probably already have other charged batteries on reserve to use and don't need the functionality of a rapid charger. So I would just discount the charger that comes in the kit and pretend it doesn't even come with it. It sounds like the included charger doesn't even have individual leds for each battery slot to indicate that slot's charging status, which is another big miss. The past Energizer kits from Costco came with better "slow" chargers (e.g. 300/150 mA to charge AA/AAA) with individual leds for each slot.

I'm wondering about the 2300 mAh AA batteries in the kit though. Made in Japan batteries implies rebadged Eneloops. But I'm not aware that there have ever been 2300 mAh Eneloop batteries being marketed. At first, I thought the Energizer AA batteries may be rebadged Eneloop Pro batteries. But Eneloop Pro AAs are rated at 2550 mAh as far as I know. Maybe they really are rebadged Eneloop Pro, but were binned out because they couldn't reach the 2550 mAh spec. Does anyone have personal experience with 2300 mAh Made in Japan Energizer batteries?
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> bubble2 1,339 Posts
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bcm00re
12-08-2021 at 07:38 PM.
12-08-2021 at 07:38 PM.
Quote from arm&hammer :
Yes, I bought both the Eneloop and the Energizer rechargeable batteries about 5 years ago to use in Xbox controllers. The Enelops still work and all the Energizers seem to die quickly and some dead.
I know that is not a great comparison and some may argue that was batteries 5 years ago, things have changed, depends on how you used them, etc...but that is my limited observation. Any others want to weigh in?

Are those Energizers made in Japan or China? Energizer was using China for awhile -- I think around 5 years ago -- until they learned their lesson. Smilie
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> bubble2 498 Posts
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Mystikalrush
12-09-2021 at 10:51 AM.
12-09-2021 at 10:51 AM.
Can only be found in person physically in store in the battery aisle, grab fast, don't look back, you wont regret this deal.
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Joined Sep 2008
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> bubble2 3,744 Posts
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MMMilk
12-09-2021 at 10:52 AM.
12-09-2021 at 10:52 AM.
Quote from budster :
I'm wondering about the 2300 mAh AA batteries in the kit though. Made in Japan batteries implies rebadged Eneloops. But I'm not aware that there have ever been 2300 mAh Eneloop batteries being marketed. At first, I thought the Energizer AA batteries may be rebadged Eneloop Pro batteries. But Eneloop Pro AAs are rated at 2550 mAh as far as I know. Maybe they really are rebadged Eneloop Pro, but were binned out because they couldn't reach the 2550 mAh spec. Does anyone have personal experience with 2300 mAh Made in Japan Energizer batteries?
Binning could explain the differences, but my guess is that it was an attempt to not dilute eneloops marketing. Panasonic seems to be playing with the capacity numbers, listing max.("up to") numbers in their marketing instead of min. capacities. Energizer I suspect is doing the same with these Costco batteries, but it appears the 2300mAh may be a minimum capacity.

I am testing one of the Costco Energizers right now, just to see their capacity from new. My test indicates the AA's are 2450mAh capacity, AAA's are 900mAh. They were at ~55% capacity in package which indicates they were either not precharged, or possible manufactured a few years ago.

Laddas
AA 2450mAh
AA 1900mAh
AAA750mAh

Energizers(Costco 2021)
AA 2300mAh
AAA 800mAh

Eneloops
AA 1900mAh
AAA 750mAh

Eneloop Pro(*Varies depending on region)
AA 2450mAh
AAA 900mAh

Eneloop Lite
AA 950mAH
AAA 550mAH
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Last edited by MMMilk December 14, 2021 at 03:40 AM.
Joined Apr 2012
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> bubble2 179 Posts
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mw2slick
12-11-2021 at 12:07 PM.
12-11-2021 at 12:07 PM.
Has anyone confirmed if these are low self discharge(LSD)?
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Joined Sep 2008
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> bubble2 3,744 Posts
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MMMilk
12-12-2021 at 02:14 PM.
12-12-2021 at 02:14 PM.
Quote from mw2slick :
Has anyone confirmed if these are low self discharge(LSD)?

I think they are LSD, mostly because they appear to be coming from a Japanese manufacture that only produces LSD cells. Since it appears they were not shipped precharged, only time will tell. If they only drop to 2100mAh after a year of storage I suppose that would be confirmation.
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Last edited by MMMilk December 12, 2021 at 02:21 PM.
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