USB C Lithium ion Rechargeable Battery, High Capacity 1.5V 5000mWh Rechargeable C Battery, 2.5 H Fast Charge, 1200 Cycle with Type C Port Cable, Constant Output,2-Pack

So beneficial! The charge last a long time depending on what you use these for. I’m using them for baby stuff like toys and rockers with sound and they last all day / a few days with heavy use.

Works great

Lasted over a year of recharging maybe once a month and now the charge doesn’t hold as long. But they were solid for a year.

This set of 4 batteries came with a cable that allows you to charge all 4 from a single USB A outlet. They also came with a case.

Review Update July 15, 2023I give up. alkaline batteries will last a year. These only last about two months. I'm tired of the slow dimming of the motion detection light and having to charge these. I'm tossing them into the circular file and switching back to aliakline batteries for this application.Review Update April 14, 2023These batteries are lasting about two months where alkaline batteries last over a year. This is very poor peformance, especially considering how much I paid for them.Review Update Nov 21, 2022As I said in my main review I installed these 4 batteries in an overhead motion detection light in our garage. Alkaline batteries tend to last about a year in that light. These lasted about 3 months before the light wouldn't turn on. So they seem to have far less capacity than the Alkaline batteries. I won't be buying this type of battery again.At this point I can't recommend these batteries.Initial Review Aug 31, 2022Why did I buy 4 of these batteries?We use virtually only rechargeable batteries in our house. We have over 200 AA and AAA eneloop type batteries in use for multiple camera flash units (Speedlights} several toys, audio equipment, etc. They have served us well. In over 7 years of use I've only had two batteries fail. Every electronic device that takes AA or AAA batteries can be powered by the batteries we have, all but one device that is.One device is an overhead battery powered motion detecting 8 inch light. It takes four C cell batteries and will not work with the lower voltage (1.2V-1.3V) eneloop type batteries. The user manual for that light specifically states that 1.5V batteries must be used. And it's true. The light simply won't function at all with eneloop batteries. So I've been powering this light (actually we have three of this type of ceiling light) with Energizer batteries. They aren't too expensive and the lights are efficient so the batteries last a minimum of 6 months. Still I hate throwing away or recycling alkaline batteries. We've had such good performance from eneloop type batteries that I was willing to take a chance and ordered these.The test...I fully charged all four of these C2 batteries before installing them in one of our ceiling lights. The good news is the light does work with these 1.5V batteries. However there is a noticeable delay between the time we cause a motion and the light comes on. It's not a long delay, more like 2 seconds. But we count on these motion detection lights to come on as we step into the garage. Until one of the three lights comes on it is pitch black in the garage so we do notice that delay.The alkaline batteries that we had in the light had been in that unit for almost a year and were still working but slightly dim. The C2 batteries were a bit brighter but not up to the full brightness of fresh alkaline batteries.I did a check of the batteries using one of those flexible strips that come with new batteries. The year old alkaline were holding slightly less power than the C2 batteries.I put one of these C2 batteries in my battery charger only to have it report voltage and current of the C2 battery but my charger behaved as if the C2 battery was faulty. I wasn't attempting to charge it but just wanted to gather some data. I really would like to be able to charge the C2 battery in my charger which can recharge up to 8 batteries at a time. I find the dual USB-C cables are not like the rest of the batteries in our house so they are a bit awkward.For my money this will be the last set of this type of lithium batteries that I'll buy.Pros:- Can power devices that demand 1.5V- The USB-C small split cable that comes in the box with the batteries coupled with the lighter weight of the lithium batteries may be beneficial for travel.- Fast charge times may be helpful but we don't complain about eneloop type battery charge times.Cons:- It seems alkaline batteries hold about 3X more power than these C2- These batteries are 3-4X higher cost than alkaline batteries. It may take a long time and a lot of use to regain the extra cost.- Can't charge in standard battery chargers.I'm sure there was a lot of engineering that went into designing these batteries but we can't find a practical use for them in our house.At this point I can't recommend these batteries.

quality of product is excellent

Below freezing and the flashlight there in starts to flicker and cut in and out or not work at all. The colder it gets the worse it is. Other than that they seem okay though.

These are the coolest batteries I've ever seen . Makes it so easy to recharge and the charge lasts .