Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries

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Electronics Camera & Photo Accessories Batteries & Chargers Batteries

Info from Amazon Listing

Recharge up to 2100 times
Maintain up to 70% of their charge after 10 years (when not it use)
2000mAh type, 1900mAh min, Ni-MH pre-charged rechargeable battery
4 position charger with advanced, individual battery charging, AA and AAA cells
Battery detection technology - automatically shuts off when charging is complete

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Eneloop

Reddit Posts and Comments

0 posts • 70 mentions • top 50 shown below

r/AAMasterRace • post
9 points • rami4554

I ordered Eneloop batteries they are safe?

https://www.amazon.com/gp/product/B00JHKSMJU/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I ordered this ones \^ and i saw on the reviews that some are leaked and some got the charger to catch on fire :/

they are safe to use ?

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r/batteries • comment
3 points • bombadil1564

I use NiMH cells in all these devices and they do great, all except for remote controls, because I don't own any.

I read somewhere that things like clocks aren't worth using rechargeable NiMH's in, but I don't remember why they said that. I charge the batteries in my analog desk clock about every 4-5 months, whether they need it or not.

The upside of NiMH over alkalines:

They don't leak! I hate ruining good electronic devices or at least having to clean out the corroded crud. For whatever reason, NiMH just don't leak (I think they're better sealed/built since they're not a one-use item.
Over the many recharge cycles, they're infinitely cheaper than alkalines. Yeah yeah, alkalines from Costco or Amazon are super cheap. They're cheap compared to buying them from the local convenience store. I did the math once and I think my NiMH AA's cost me about $0.002 per use. Try finding alkalines for less than a penny each.
For some high-draw devices, they can vastly outperform alkalines.
They're so much better for the environment, because it will keep batteries from filling up our landfills with often toxic ingredients leaking into the soil. I'm not aware of the toxicity of NiMH internals, but I've never read anything about that they're any better or worse than alkalines.

The downsides of NiMH:

They cost more upfront. If you only used them once and never bothered to recharge them, they would be more expensive. But you're going to actually recharge them, right?
You have to buy a charger and then wait for them to recharge. Yep, that's true. You can get a basic smart charger, like the one that comes with Panasonic Eneloops, for about $18 USD, which also comes with 4 AA cells...you can't get a better deal than that for a charger. Also, Eneloops come pre-charged from the factory (charged via solar power, nonetheless!), so you can use them immediately, just like alkalines. Regular Eneloops (the white ones) hold their charge for a very very long time, up to 70% charge left after 10 years of storage.
You need to have extra cells on hand. Say the NiMH in your TV remote die and need a charge. But you wanna watch TV now and must have the remote! Rather than waiting for the 2-3 cells in your remote to recharge (typical 2-4 hours to fully recharge), if you have a spare set of cells on hand, you could just pop them in, charge the others and keep them handy for the next replacement months down the road. While this is a greater upfront cost, it's not as bad as you think. It's unlikely that ALL of your low-draw devices are going to need the cells recharged all at once. So just keep a set of 2-3 extra AA and AAA's on hand for when a particular device needs the cells replaced.

I was just thinking yesterday, as I was working out in the yard in the dark with my headlamp (powered nice and bright by a single AA NiMH) that I was so glad that a few years ago I finally invested in a good charger and enough NiMH cells to power most of my devices.

Last tip: If you're still hung up on the initial cost, you can go dumpster diving. What I did is I went down to the local recycle center and asked if I could paw through the battery buckets and they said, no problem. I put on some rubber gloves (battery acid and all) and picked through the batteries. I pulled out one day about 22 NiMH and 27 lithium primaries (non-rechargeable AA and AAA's that last a long time, even in sub-zero weather and cost about $2/ea at the store). Score, I thought! With a digital multi-meter (already had one) and an "analyzing charger" (about $35), I was able to sort out the junkers from the gold. For the lithium primaries, I found that anything below 1.65V wasn't worth keeping (brand new, they're 1.8V even though they're labeled as 1.5V). For the NiMH, I put them in the analyzing charger and ran a TEST cycle. This told me how many mAh the cells could hold. If they held less than 80% of their labeled capacity, I recycled them back. If they held more than 80%, I measured their voltage about 30 minutes after being removed from the charger and made a note of it. Two weeks later, I would check the voltage again and if it had dropped significantly, then the battery went back to the recycle center. This took me some time to go through all the cells, but in the end, I ended up with more than a dozen quality NiMH cells. I have a desk clock that I use three of these in and I only have to charge them about every 5 months. For low draw items that aren't "critical", I use a lot of these reclaimed NiMH cells with good results.

For my business, I use some professional wireless mics, which use 2x AA for the transmitter and receiver packs. I use these in live settings and can't afford to risk the batteries not being completely 100% reliable or hold a solid charge. For one set of these wireless mics, I use brand new Eneloops in and it works excellent. For another set, a set that is less critical, I use some of my best recycled NiMH cells. They too work great and as far as I can tell, they're no less capable than the brand new Eneloops.

Anyways, that's likely way more info than you were asking for. I just love the NiMH these days, they're absolutely nothing like the NiMH cells of the early 2000's.