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Just installed mine - (2) AAA in each (mouse and keyboard). They came with the accessories. How long they will last is a different story. I loved my wireless mouse on my previous computer until I got tired of putting in new batteries and finally I started using both a wired mouse and keyboard. I'll add that the mouse is quite nice - hope the batteries don't turn out to be a pain.
Sorry, there was a problem. Please try again later.I've had the batteries in my remote control keyboard and mouse (wireless USB) for at least 6 months now with the HP Envy...they are still working fine.
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