bump AA USB-C Rechargeable NiMH Batteries - 10 Pack - Sustainable & Cost-Effective Alternative to Lithium Ion - Fast Charging, Long-Lasting Power - 2 Charging Cables Included

We have Blink cameras we use on our bird feeders and we go through a lot of batteries on them! 10 seconds of recording every time there is movement takes up a lot of juice, these work great! We always have some charging so it's easy to change them out and keep recharging. Definitely a money saver! I have since purchased the AAA for remotes!

Great rechargeable…easy to recharge and know they are recharged.

I got these back in July and wanted to give them a few recharges before reviewing them. The answer is: so far, so good.These batteries come with a handy multi-pronged USB cord so you can charge four batteries at once--but as long as you have a USB-C cable, you can recharge one of these batteries.In my high-usage items (some always-on seasonal decorations) these have proven to last at least as long as "normal" batteries. In normal-use items (e.g. a remote), I haven't had to replace them, so I guess "TBD" as to how long they will last.

I love these. Much better than buying new batteries all the time!

This is a review of the BUMP AA USB-C Rechargeable NiMH BatteriesHow I rate my reviewed items:Personal preference or comments about the instructions do not affect the star rating.5 Stars – I found no faults with the item.4 Stars – The item functions well but could be improved.3 Stars – The item does work as intended but with some difficulty and needs improvement.2 Stars – The item sort of works as intended but has several limitations or a major fault.1 Star – The item either does not work properly, is very difficult to use, and, in my opinion, not worth purchasing.Summary:As 1.2V rechargeable batteries, they work well and will power most 1.5V AA devices properly.I recommend them.I charged these via a USB port on my desktop computer.Details:These are 1.2V batteries not 1.5V AA batteries. I did not see that anywhere in the description, only in a picture/illustration, easily overlooked. I tested these batteries in several devices and all worked properly.The photos show 4 batteries being charged and after about 1 hour 3 are fully charged and 1 is still charging. 9 batteries were fully charged after about 1 hour of charging and 1 took about 2 hours. Nothing wrong with that, it just indicates that 1 battery had a lower charge out the box. However, later I recharged the batteries after use and 1 battery took over 4 hours to charge while the other battery use in the same testing took only 1¼ hours. It does state charge times of 5-8 hours, so it is still within limits.After charging, I measured the no-load voltage of each battery. The readings ranged from 1.370V to 1.391V. For those interested, these are the readings I got for each battery: 1.370, 1.371, 1.371, 1.373, 1.381, 1.384, 1.386, 1.389, 1.391, 1.391.In the devices that I tested them in, they worked well; However, they may not last as long before requiring recharging because of the beginning lower voltage. Hard to tell for sure as I was unable to test this theory.If the batteries hold a constant output voltage level as they are used until almost discharged, then the run time will be very good. Again, I was unable to test that aspect of the batteries. Since my mouse was indicating my AA batteries should be replaced, I shall leave them in the mouse and see what happens. The 2 single use AA batteries I replaced had a no-load voltage reading of 1.168V and 1.19V; Therefore, the voltage will not have to drop much before the mouse will show them as being in need of replacement/recharging. Still, it may be more economical than single use batteries. Time will tell but, since the mouse has a very low current draw, it will be a long time.Using my digital camera, I proceeded to test how many photos before the camera told me to change the batteries. The test was run as follows:1. All photos were taking with the flash.2. After about every 10 photos, I cycled the zoom telephoto lens through its full range.3. I turned off the camera after about every 20 photos for various amounts of time.4. The testing was done over a 2-day period.At the end of test day 1, after 545 pictures were taken, the camera indicated low batteries. After resting overnight, the camera did not indicate low batteries when turned on. I then transferred the pictures to my computer and continued testing. The low batteries indicator came on after several pictures were taken. This continued for several more cycles, 126 photos, before the camera turned on and indicated low batteries immediately. After another 20 photos, the camera told me to change the batteries. I transferred the photos to my computer and rested the camera for about 1½ hours. I then was able to take 5 more photos and transfer them to my computer before terminating this test. I snapped a total 691 flash photos before the camera told me to change the batteries and then managed another 5 for a total of 696 photos.The batteries began the camera test with a no-load voltage of 1.371V and 1.373V and ended the test with a no-load voltage of 1.150V and 1.153V. They took about 8 hours to recharge.I did not have an AA powered flashlight to test them in but expect the light output would be dimmer because of the lower voltage.The following devices were tested and passed: 1. Wireless computer mouse 2. Hands-free soap dispenser 3. Blood pressure monitor 4. Holiday animated musical devices (several) 5. Digital camera

These are great rechargeable batteries. They charge fast and hold the charge for a long time. I really like that you do not need a charging device for them because somehow it constantly gets lost in my household! These batteries are good quality, batteries, slots, well, and can be charged not only by the provided cable since the plug is a pretty standard USB-C.

These are the first rechargables I've used that I didn't dislike. The others always required bulky external chargers. These you just plug in. They charge quick and seem to work just fine. I've been using them in my wireless strobe trigger on my camera.

ArrivalThis (10) pack of 1.2-volt, 1,000mAh, AA batteries, with a charger and USB-C cable arrived in a moon tape sealed colorful, thin, blue cardboard type package measuring about 4 x 6½” x ¾” and weighing just over 8½” ounces which is about 40% lighter than non-USB comparable Ni-Mh rechargeable type batteries, which have greatly more power at 2,800mAh.What was inside?The batteries, of course, in a simple open plastic tray, along with a USB-C cable capable of charging four (4) batteries at once. Other competitors provided hard-shell plastic containers that each held four (4) batteries, which were nice cases for storage. So, no real bonus here.Voltage1.2-volts is low and underpowered as compared to 1.5-volt batteries. Nowhere did the listing prominently note 1.2-volts. It’s printed on the battery though. That’s a negative, it’s almost as if this critical piece of information was being hidden. I should not have to seek this out from a picture in the listing.Shelf-life?Unknown. The batteries never mentioned their shelf life. The batteries received did not indicate a manufacture date, nor an expiration date, as nothing was marked on a single battery, so, that would be a big criticism. I received these batteries late July 2023. How can I decide if they are “fresh” when comparing them with a big-name competitor, which sent me batteries, also made in China, during November 2022, and they had an August 2022 manufacturing date. So, I am going to use that as a barometer, i.e., three (3) months from date of manufacture to receipt, from China, as being reasonable. Reason being, when buying batteries, I want fresh batteries, and I have no idea if these are fresh, or not. Those competing batteries also had a five (5) year shelf life. [I am factoring out the rechargeable nuance.]Discharge rateThe batteries have printed on them, a note that if not used [and recharged] within a three (3) month period, to do so. That’s a negative surprise, most present Ni-Mh rechargeable batteries have a slow discharge rate measured over a considerably longer time period, so, to me, this is older rechargeable technology. To discharge at a possible rate of 33% a month is high in my opinion. There is nothing worse than reaching into a drawer and battery tray and pulling a battery that had discharged in storage. That is a big negative surprise.ChargeI was curious about these batteries’ charge, so I went over to my battery tester, to see how these scored. The batteries measured at 50% to 75% of their maximum charge level. Through various tests, I do expect these batteries will last about half as long as many other competitors, as these are rated to recharge 500 times, which is about half than my other batteries, that rate at 1,000. The USB-C charging cables are for a 5-volt charging environment. The listing noted charging time was 5 – 8 hours, the batteries note 6 – 8 hours. This is kind of slow, I have fast chargers that beat that by hours for batteries with much larger capacities. So, this is not fast charging environment, which is okay, as such can really tax batteries. Charging empty to full took those many hours, which is near an overnight endeavor.ValueValue is key, and these are a no winner. Their price is near 30% to 100% more). Those are big numbers, especially considering they are a mere 1,000mAh and I am comparing these against 2,800mAh.UL Listed?No. I have other batteries that areRoHS compliant?No. I have other batteries that are.CE claimed?Yes, but CE is not recognized in the US.SizeI also checked size, because there is nothing worse than an oversized battery that will not fit the slot of an electronic device, such as a phone, remote control, or a toy, because the battery is too big. We used a competitor to compare. These AA batteries measured comparable to that of a competitor, standard sized.Country of originChinaBottom-lineConsidering the totality, would I select these again? No, I would look elsewhere. The reason I selected these, was to experiment with them, against others that I have. So far, these are just so, so, good). They are a weak four (4) stars for my money. 1.2-volt, 1,000mAh, is weak, as in landscape lighting batteries. These are more of a novelty, involving the ability to direct charge. I have now decided that I need more practical batteries.I hope my thoughts added information.