Good wireless mouse that's great for gaming, gets pretty good reviews. Cheapest I've seen it.
Logitech G602 Wireless Gaming Mouse
250 hours of non-stop gaming. Your move.
With up to 250 hours of battery life, G602 redefines the laws of wireless gaming. From the pinpoint accuracy of the exclusive Delta Zero sensor technology to the extra high durability primary switches, you can count on G602 to dominate boss after boss.