Computers, Laptops & Tablets Accessories & Hardware 55 55 people found this article helpful Battery Life in Magic Mouse Pulls a Disappearing Act Use rechargeable NiMH AA batteries to reduce power cost By Tom Nelson Writer Tom Nelson is an engineer, programmer, network manager, and computer network and systems designer who has written for Other World Computing,and others. our editorial process Facebook Twitter Tom Nelson Updated February 08, 2020 duckycards / Getty Images Accessories & Hardware Keyboards & Mice Monitors Cards HDD & SSD Printers & Scanners Raspberry Pi Tweet Share Email The original Magic Mouse comes with AA alkaline batteries installed and ready for use. Some early Magic Mouse users reported that battery life was abysmal, though—a mere 30 days or so. This weakness may be one of the reasons Apple changed the battery type used in the Magic Mouse 2 to an internal rechargeable lithium-ion battery. Sources of Battery Drain Apple, Inc. It's quite possible the batteries, and not the mouse, may be the culprit. In most cases, the Magic Mouse comes with Energizer batteries, which are a well-respected brand, but it's difficult to know how long they've been on the shelf before being installed in a Magic Mouse. It's likely that new, fresh batteries will last longer than the 30 days some users were getting out of the initial batch. Of course, battery life also depends on usage. The Magic Mouse is supposed to go into hibernation when it detects a lack of use, which should help extend battery life. Turning the Magic Mouse off manually when you're done using it, with the switch on the mouse's belly, should help push battery life a little further. Rechargeable Batteries Another option to get the most life out of the Magic Mouse's batteries is to replace them with either lithium-ion AA or rechargeable nickel metal hydride batteries. Both should provide longer life; the NiMH batteries have the added benefit of being rechargeable. If you decide to go the rechargeable route, look for NiMH AAs with a 2900 milliampere-hour rating or better. Many of the bubble-packed, brand-name rechargeables you find in the checkout aisle of your local hardware or grocery store have a 2300 to 2500 mAh rating. While they will work, they won't have as much staying power, and you'll find yourself recharging them fairly often. The 2900 mAh batteries are sometimes referred to as high-capacity batteries. Lithium AAs are also available in various Mah ratings, and once again, the 2900 mAh rating is a good value to look for. The advantage of lithium batteries is a much longer battery life than standard alkaline AAs. They also last longer than the NiMH batteries do on a single charge, but they're not rechargeable. Of course, lithium AAs have a downside; they're a bit expensive when compared to standard AA batteries.