I DO SO LOVE THESE BATTERIES AND THE CHARGING PORT IS EASY TO USE, THEY INDICATE WHEN THE BATTERIES ARE CHARGING AND WHERE WITH BRIGHTLY COLORED LIGHTS INDICATING IT, YOU CAN CHARGE TWO AT A TIME IF REQUIRED, THEY SEEM TO LAST AND LAST FOREVER. I LOVE THEM, IN FACT, I'M GOING TO ORDER ANOTHER ONE BECAUSE IT SAVES ME MONEY ON BATTERIES. IF YOU WANT TO SAVE MONEY, THESE ARE FOR YOU. I HIGHLY RECOMMEND. Read more

I have several devices I have to buy disposable batteries for because, up to now, the rechargeables (NIMH) would not work in them because it only supplies 1.2V output. Not sure when these came out but this is the first time I recall seeing them for sale. This particular set offers the most bang for the dollar in terms of capacity etc. that I could find among the choices on amazon. I was attracted to this one by the storage case/charger and the capacity for the price. From what I've read, these may not deal well with temperature extremes so it's probably not a battery for an outdoor device in the winter time but other than that they get good reviews from folks that have them. Any battery tech that uses chemical reactions will be affected by temperature, we do have some choices that handle it better than others but it's still a very expensive type of battery. In the last few years many older battery techs that have been too expensive for consumer use have been steadily reinvestigated to find better/cheaper ways to get to the same end result. I personally think we're on the brink of a really big leap in battery tech, we're going to have to do better to power the next generation of devices such as robotics and more. The military "big dog" program needs to get that boy off his gas generator for sure and they've been talking about portable rail guns for a few years now (not to mention the boston dynamics bi ped robots). This unit requires an additional 5v usb adapter such as comes with many tablets and phones and comes with a usb A to C charging cable (just plug it in, I believe a 3A adapter is recommended which is what comes with current phone models or you can invest in one of a huge list of products available on amazon many in the twenty dollar range). I bought a fancy new garbage can with a motion activated lid that rolls open and closed, it needs 1.5v because it's a motor, these are working fine so far only time will tell how long they'll last between charges (turns out a set lasts a little over two months in the garbage can which seems pretty good for how much it gets used). These arrived more than half charged it was only an hour or two before each cell showed full charge. The case is nice, each cell gets a charge indicator and it's also a nice compact case to store any you aren't using. With two sets I have a spare to swap into use while the other set charges or to use in something else. Read more

Solo puedo decir que son excelentes y parece que no mienten en cuanto a su capacidad. La ventaja de usar litio es la capacidad de retener su carga con respecto al tiempo y obviamente su densidad de potencia en comparación a las Nickel-metal. Otra ventaja que le encuentro es su cargador tipo “caja” que es muy práctico para la movilidad y aparte te dice el estado de carga de cada batería. Definitivamente voy a comprar otro juego, el primero lo uso en una cerradura electrónica y caja fuerte. Read more

I had an issue with a few of the batteries. I was immediately contacted by customer service and the problem was rectified immediately. Now everything works perfectly! Great product and even better customer service!!! Read more

So far everything checks out and works as advertised. This has been easy to use, very durable and works great with these door locks that consume power quickly. Thus far this has been a great value for the items. Read more