Perfect product for use in inverter and power strips (power strips because too often invade the office here can connect taken and saved 3 3 Normal definitively resolve the problem. We know that mark the actual duration of the batteries is more than 2 24/24 year use. We replaced these with safety every 2 1/2 years although some still work perfectly (because we give them then staff) for more than 4 years! perfect for a desktop computer with its screen.