aa Batteries with Charger XTAR 1.5V Lithium aa Battery 4150mWh with LC4 Battert Charger (LC4+4pcs 1.5V AA 4150mWh)

I tested 4 kinds of Lithium AA batteries, and I'm putting the test results below. These batteries were the best of all 4 I tested. Highest capacity and very useful low voltage warning that all other batteries were missing. I got almost 19 hours of runtime on my Garmin Oregon 700, which outlasted all other batteries by several hours. New Xtar: Rating: 4.15Wh, Charge: 5.5Wh, 3.45Wh Usable discharge at 1A https://www.amazon.com/gp/product/B0CF8ZNZ33/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 Summary: * This is the only lithium battery that drops its voltage to 1.1V to give you a low voltage warning. Other batteries I tested just die with no warning. That alone is a reason to select it. I tested it with my garmin GPS and it gave me 2H of low battery warning before finally dying. Very nice! * It is also the battery that gave me the most actual discharge capacity * Seller is not lying about cell capacity (thank you) which of course is higher than actual usable energy due to conversion losses * New charger is unfortunately bigger than the old one and drops the USB-A output feature to use your batteries as an emergency USB charger * Verdict: this is the best battery I tested and what you should buy as long as you don't need a built in charger like EBL Old Xtar: Rating: 3.3Wh, Charge: 5.3Wh, 2.7Wh Usable discharge at 1A https://www.amazon.com/gp/product/B09NLVJDY6 Summary: * This is the older Xtar battery. It had best in class capacity until the newer one that came out with added low voltage warning. There is no good reason to buy this battery anymore, get the new one. * Its capacity is equivalent ot the EBL battery with built in USB charging, so the EBL is more versatile * The charger is very compact and can act as a USB power source, that's a nice feature. * 10.6Wh to charge 2 batteries, or 5.3Wh charge per battery EBL 3.3Wh rating, Charge: 4.3Wh, 2.7Wh usable discharge at 1A https://www.amazon.com/gp/product/B08RZ5NDMM Summary: * There is no low voltage warning, but the battery capacity is actually equivalent to the old Xtar despite the space lost to the built in charger. The new Xtars last longer than the EBL though. * Interestingly EBLs need less energy to charge than Xtar for the same output capacity, they are more efficient * Big warning: if you try to charge the batteries via USB while they are in use, they are going to output 5V instead of 1.5V. This is unexpected and fried one of my GPSes. You cannot charge them while they are being used. Deleepow 3.4Wh rating, 3.8Wh charge, 2.4Wh usable discharge at 1A https://www.amazon.com/gp/product/B09NLXQRP3 Summary: * These battery are not for sale anymore, and they were the least performing amongst the ones I tested. * The 3.4Wh cell capacity is probably untrue with the charge and discharge numbers I got

The very moment I learned these exist, I had to research into them and see if it was true and if they could possibly be as good as I hoped. Turns out, yes. Unequivocally yes. All the issues I have with alkaline AND nimh batteries, all solved. These last nearly as long in most things as an alkaline battery (in my limited experience using them in flashlights and my Xbox controllers, they give me roughly the same use time as a fresh pair of Duracells), they charge in literally two hours flat, and they output steady 1.5v until nearly dead. And that's the best part. Even good alkaline batteries almost immediately drop off voltage to much less than the initial 1.5v, which means my flashlight gets progressively dimmer the longer I use it. Not with these. These bad boys are like having fresh batteries in stuff the whole time. And they even thought of the courtesy of having a voltage drop for a low battery indication, so I don't get left in the dark when it's time to swap out. I've been using Xtar brand chargers for my other Li-ion batteries for years. I trust this brand, and they've yet to let me down. So yes, buy these ones. In fact, I'm gonna buy some more right now lol 😎

Coming off using EBL NiMH rechargeable batteries, these XTAR units are a dream for use in wireless microphones. I'd had such poor experiences with the NiMH that I'd gone back to alkaline, but these batteries have renewed my faith in rechargeable AAs!

These are higher amp batteries and must be charged in the charger cradle provided. Most likely if you try to charge the batteries directly when installed in your device (like a portable radio scanner) the device will not charge the batteries. One nice feature is you can charge 1,2,3 or 4 batteries at a time and lights blink on each battery to tell you when charging or fully charged.

Bought these in an attempt to keep a Blink doorbell happy. 6 months in and so far, so good. First pair lasted 4 months with 40+ daily events. Second pair are going strong at 2 months through freezing temps. Low battery alerts work. Much better than trying to use NiMH. They’ll only need about 5 charging cycles to break-even with non-rechargeable lithiums, so unless these fail quickly, they should be a good deal!

Seem to be working great so far. Fit perfectly in a Schl@ge Enc*de door lock. Haven't had them long enough to see what happens at "low voltage".

Bought to use in my two Blink 2k cameras. I use the cameras for viewing wildlife and regular lithium batteries last about 2 weeks before they are dead. These are lasting 1 week, so far. Well worth changing them more often for what I save in the cost of buying new regular batteries. Just so you know, when freshly charged they still show the red low battery symbol in the Blink app, but that doesn't effect their performance. Buying 4 more so I can just swap them out when needed.

Have bought 3 sets of these. Most lithium’s don’t last long between charges especially the one’s the have mini usb receptacles. Those are a waste of money! Of these12 total AA batteries, I had one that didn’t show charging so sent that 4pack back and got refunded. Will order another. These are the only lithium AA’s I can recommend!