Worked for a while
Got one of these initially to charge a handful of lipo batteries I was using in my FT planes. It worked great, but after a few months the buttons started intermittently not working. Eventually the sticker over the button traces lifted up, and I saw that the traces were stuck to this sticker, and were now broken. I continued using the charger by just using multimeter leads to complete the traces on the button I wanted to "push". It worked this way for another month and then the internal AC adaptor quit. I tried using an old laptop power supply but the B6AC is picky about voltage. Finally, after all the trouble, I tossed it in the bin. Can't recommend this one. There are supposedly genuine and other clones that use mechanical buttons, after this experience I would stay away from designs that use the "sticker" style buttons.