imuto Rechargeable AAA Batteries Lithium 8 Pack with Fast Charger,1300mWh 1.5V Constant Output Triple a Lithium Batteries 1600 Cycles Long Lasting

This is not a Vine review: I bought the set of 8 imuto AAA batteries with the charger for $22 in Mar 2025.- charge the batteries when you receive them: mine arrived at about 40% charge. No big deal - just charge them when you get them.- the batteries can be charged in my XTAR VX4 and EBL C708S3L chargers in addition to the one in the kit.- the charger included with these batteries will **not** charge NiCD, NiMH, or my other rechargeable 1.5V Li-Ion cells - it's for these imuto cells only.I have several chargers that will charge 1.5V rechargeable Li-Ion cells (including these), so the included charger isn't much interest to me. That said, The charger's physical design is appealing but it has some aspects I don't like:- as mentioned above, the charger only works for these specific batteries (though the batteries can be charged in other chargers)- this charger only works for AAA batteries. Consider whether the imuto kit that has 4 AA and 4 AAA cells might make more sense- for some reason they put the USB-C power input on the lid so it ends up being a clunky thing that kinda gets in the way. It's not a deal killer, but I don't understand why they didn't put the input power jack near the bottomNow the good news - these AAA cells have a true capacity around 720 to 800 mAh (equivalent to 1080 to 1200 mWh). It seems that the capacity improves a bit (10-20 mAh) after a few charging cycles. Now you might think since imuto claims these cells have an 865 mAh/1300 mWh capacity that this means you are only getting 85% of the claimed capacity - and you'd be right.However in my limited experience, getting 720+ mAh from a rechargable AAA cell is pretty good. At the price these were when I bought, the cost per cell is $2.75 which is very good - and that's considering the charger as free. Other 1.5V rechargeable Li-Ion AAA cells I have from a better-known brand that claimed 800 mAh/1200 mWh capacity tested to only about 320-350 mAh capacity at a higher cost. Less than 50% of the capacity of the imutos for 20% more money.I think these cells are a good deal even if the true capacity is only 720+ mAh. I wish imuto - and all brands - were more accurate with their claims.Note that the listing has this buried in some small print (I think this applies to many 1.5V lithiums):"Please Note: The maximum discharge current of imuto 1.5V AAA lithium battery is 0.5A. Due to differences in circuit design, some high-power LED flashlights and LED headlights may cause the battery to work overload and cause abnormal heating. If your device has a high brightness/strong light mode, please pay attention to the high current requirements of the device. Long-term full current output and over-current output will cause abnormal battery heating."The bottom line from me is: this kit is a good value for the batteries alone especially when there's a deal active. But avoid using the batteries in high drain devices. Just an FYI - I bought a 2nd kit at the sale price.**Another update** (Apr 2025):I stumbled on a chart imuto has on another of their rechargeable battery listings (www.amazon.com/dp/B0DCHTZBT8) and I'm adding it to this review. The chart indicates that while the "cell energy" is 1300 mWh (which is what is advertised in the product listing), the "rated energy" is 1170 mWh and the "rated capacity" is 780 mAh. The "cell energy" is said to be the "actual total energy" (theoretical I guess) while the "rated" numbers are the "actual" energy or capacity of the cell.In the chart, imuto defines these values as:- Cell Energy: Actual total energy of the battery cell- Rated capacity: Actual discharge capacity- Rated Energy: The effective energy actually deliverable by a battery (typically 5%-15% energy retention is required in rechargeable batteries to ensure system safety and cycle life)Note that the "Rated" numbers stated by imuto in that chart match up with the numbers that came out of my testing.So you can believe those two columns of the chart. It seems that advertising the theoretical energy of a cell is very common in the battery universe, leaving it to consumers to figure out how much juice **you** will be able to get out of the cell. I wish the "rated" numbers were what all vendors would publish/advertise.I think that chart probably gives people the kind of capacity you can really expect from many other vendor's batteries, not just imuto, when they advertise a particular mWh number. I appreciate imuto providing this chart, though it took luck for me to stumble on it.

They work fine, pretty much as expected.There are a number of 1-star reviews, most of which are from people who do not understand the technology. 1. People complained of overheating - Most lithium batteries put out 3.7 volts and so require electronics to step down the voltage to the 1.5 volts of a standard AAA or AA battery. Such electronics are limited in the amount of current they can produce, and so using these batteries in high current environments is going to cause the electronics to heat up, or overheat, not to mention the fact that lithium batteries themselves are limited in the amount of current they can produce. 2. Lithium batteries, while are a high energy-dense battery for rechargeable, standard batteries are usually higher and will last longer. The benefit of lithium batteries is their ability to be recharged. These bats also have the benefit of putting 1.5 volts throughout their power cycle and do not have the voltage constantly curve downward as they are discharged.

Este es un producto excelente yo lo recomiendo 100% si eres de esas personas que tiene muchos accesorios y artefactos con batería, por ejemplo yo uso micrófonos inhalambricos, mando, mouse removedor de cafe maquina afeitadora todos con batería AAA o AA lo cual este producto me resulta excelente, la calidad con que se ve y toca es espectacular super ergonómico su diseño y muy portable

They are in a nice package. I like the concept of this product.The voltage does run a little above 1.5v but it makes my helmet light extra bright so I'm good with that.Only issue is the 8 aaa setup I bought had 2 bad batteries.I submitted on the site about it. I'd really like 2 new ones that work. Because I do need 8 for what I got them forUpdate they gave me 8 new ones.

All of the batteries come in the case precharged, and they all measured around 1.51-1.60v in voltage. The charging terminated after a minute or so after charging them out of the box, so I was a bit surprised how well these kept while in storage, as most batteries are usually only charged up to 30-60% of their capacity before they are sold. The case itself only hold AAA batteries and don't accept AA batteries, although having the charger as an organizer box for your batteries is a pretty cool idea since not only would you not lose your charger, you could just top all your batteries up by simply plugging it in. You also don't have to figure out which ones you have charged and when you have charged it since the charging box charges all of them at once for you. Quite nifty to say the least...

Great way to charge rechargeable AAs and AAA’s. Keeps four batteries always charged and you can exchange them with the batteries that need to be recharged and it knows and flashes a red light on the ones that are recharging until it is charged otherwise all the other batteries will show green. It is very convenient to store them and charge them. I’m very happy with this product.