neat analysis. I have a wireless keyboard that wasn't working well - would disconnect and go unresponsive. I changed batteries 2 or 3 times and the problems per

neat analysis. I have a wireless keyboard that wasn't working well - would disconnect and go unresponsive. I changed batteries 2 or 3 times and the problems persisted. Finally I happened to change batteries to a batch of duracell batteries and the problems went away. Brand name vs. dollar store may vary on peak current capabilities as well as overall power density.