Rechargeable batteries have one great advantage: low cost over the long haul. While you’ll need to invest in a battery charger (and extra rechargeable batteries so you can easily rotate fresh batteries into a device while you charge the depleted ones), the overall cost over time is much, much lower than if you had used alkaline batteries instead. Rechargeable batteries do have some drawbacks: they self-discharge faster than alkaline batteries, and they hold a very slightly decreasing amount of power each time they are recharged. However, these batteries can be recharged a lot—up to 1,000 times, according to some manufacturers—and recharge time can be measured in minutes. All you need is a wall socket to plug in the recharger. These batteries are ideal for low-drain devices that are at hand, used often, and in which replacing batteries is easy, such as remote controls, electric toothbrushes, and wireless computer mice and trackballs.