Do what they should. However, one should not expect too much. Not for nothing, these batteries are called LONG LIFE. They keep Real an eternity and are therefore well suited for remote control and for use in eg guitar. However, energy-guzzling Anwendungn they can not at all. A flash unit could operate with them under any circumstances! Conclusion: For those who do not ever want to change the batteries and only "normal" devices so betreiebn a strong buy recommendation. For energy-intensive applications not recommended.
