the batteries are 5yrs old Ternergy. Should I buy new Enloops ? What brand should I buy ?
Eneloops on my iMac mouse last around 3 weeks with usage of 5-6hours daily.
That sounds rather poor performance. I have the wireless microsoft 2000 mouse with 2 camelion AA 800mAh used extensively more than 12 hours daily (job machine + fun time) and still I have power after 1 full month where I charge the batteries just in case; they have achieved up to 1.5 month with such use when the mouse's low power light blinks.
microsoft gaming mouse must be sucking mega joules from batteries. They don't last more than a day.