working good, everything as it should be
Battery (reportedly 9V) consists of 2 cells Li-ion, ie the theoretical voltage is 8,4V, but the electronics stop charging at about 8.1V. The 9V battery operates mostly from 7.1V above, turn off or do not work reliably when falling below this value. This reduces battery usability capacity. There was no 8,2V (even 8,4V) in the description! Elsewhere I bought batteries that are 3 articles LIFEPO4, and you have a tension really 9.1V.