I got these for my blink cameras. And they work great. I've had some for over a year now and there are no signs of them getting weak. This can be probably said with any battery but I wish they lasted just a little bit longer. Well compared to the non-rechargable batteries I think that they do last longer. With the cost of lithium batteries these are well priced. I would say I've easily gotten the value out of them for my blink cameras. I keep some extras on hand for when they go dead and then it's a easy replacement for Taking the cameras down and putting them back up.Using in Oculus Quest 2 controllers. Have been great so far. Just have to remember to swap them every week or so. There's no indication that they're low. They're just working one minute and dead the next. Nothing like being in the middle of a game and a controller drops. LOL. Otherwise they're great, no more burning through AAs in the OQ2 controllers.I love these batteries! Incredible durability and legendary staying power. I have been accruing my collection over 2 years and now I have about 20 AAs and 12 AAAs. My biggest problem is the pricing. The 2 & 4 packs go on sale regularly for as low as $6.50/battery but why not the 20 pack?? I would totally pay $100-$130 for 20 of these but the 20 pack price has not budged in over 2 years. Not once... Come on Tenavolts :) Your product is so good you could put Energizer rechargeables out of business! Ni-MH is soo meh at 1.2v. These are rock solid 1.5v.I will say that I have had 1 of my Tenavolts chargers go bad. It was only 2 of the 4 slots that stopped charging but otherwise I only have praise for these batteries. Luckily I have like 6-10 of these chargers kicking around now because the non-charger version also rarely goes on sale (Come on Tenavolts! Ease up on those marigns to gain some market share.)Can’t find batteries anywhere to buy separately so have to buy a charger every time. I only need one charger. Also only comes with 4 batteriesThese are expensive but they are the best. I have several other rechargeable lithium batteries and they don’t hold a charge beyond a day or two. I would recommend these over allI put these in a bind that requires a higher voltage than most other rechargeable batteries will provide. This works perfectly and has for 2 months. I am surprised that the charge has lasted so long. Blind useage: 4 times a day. 2 up and 2 downs per day every single day. Count me as impressed. I do like then so far.i like them. works with my blink camera system well.Long last and works good with my blink XT camerasSeem excellent for blink cameras. Come fully charged ready to go and 3 weeks in not skipped a beat.Don't waste your money. Two of the four received run out very quickly. The LED lights powered by two of the batteries work many hours but the LED lights with the remaining two batteries shut down within a few hours.Put into a blink camera the camera states instantly, Replace batteries. They don’t even measure 1.5 volts after a full charge. Overpriced and not fit for purpose.First, the seller failed to respond to my requests for reimbursement due to a malfunction with the product. This is my first comment I have ever left on Amazon and it proceeds as follows:I used all four batteries for my little fan. At first, it would last around five hours but lately at full charge, it would only last one hour. I then noticed that one of the batteries would keep charging while the other three are fully charged. I checked the battery with my meter and it says zero. So I know that one battery is faulty and makes the fan go extremely slow after one hour because it requires four batteries to operate. I would appreciate the seller to rectify this issue, and immediately contact me.Excellent long life batteries. I wish they sold just batteries on Amazon so I could buy more without another charger