The batteries are exceptional. They were used to power an outdoor Christmas wearth. 4AA batteries powered 100 led lights about 8 hrs a night in the north east elements and lasted about 14 days. I don't remember the exact amount days. I just recall saying there still going. I just purchased the AAA for older headlamps
So far, they are superior to any other batteries I have ever owned, and I have owned a lot. 1. they are much lighter than Nicad. 2. You can use a 2-3 amp 5volt Computer USB/C power supply for a fast charge. 3. ie you don't have to buy a special charger. 4. You can charge all 4 at one time. 5. They charge fairly quickly. 6. No problems at all.
Really disappointed in these batteries. I purchased these to use in a noise canceling headset. Using these batteries causes an annoying squeal in the headphones. Put my old lithium-ion batteries back in and everything's great. Really bummed. I had high hopes for this product. Yes, they were fully charged, etc.
I bought the big packs of AA and AAA batteries - good packaging, simple to charge up (ingenious) and straightforward. Although the price may FEEL a little much, as long as they last, the double whammy of not throwing away dead batteries and being able to reuse and not have to continually buy new batteries quickly makes these GREAT VALUE. (As yet I don't know how long the charge will last. I shall update!!)
I purchased these Coast AA rechargeable batteries along with a Coast Polysteel 600 flashlight for use primarily in my house. They worked exactly as expected; very happy with my purchase. I must admit I knew what I was buying because I already have two sets of Zythion X AAA batteries I have been using in my headlamp , and small flashlight. Great job Coast Products!!