2015-02-03 My home server has a UPS since 2007. I had to change the bat- teries (akkus) the first time in 2010, after 2.5 years. Now, I changed them the second time, after 5 years. The longer interval results partly from the server being offline for several months. I'm curiuous when the next battery change will be necessary ... by the end of 2017 perhaps? http://marmaro.de/lue/ markus schnalke