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Door staff@engadget.com (Thomas Godwin) - 12 Oct 2026
TV remotes, clocks, a wireless mouse, and things of that nature are low-drain devices, and alkaline batteries are usually the most practical option for each. They cost less and remain viable for a long time, even if the package sits untouched in a drawer for a few months. For the most part, alkaline cells are single-use, so they require replacement.
Lithium-ion is the popular choice for devices that require frequent recharging, like the device you're probably reading this on, laptops, cordless power tools, and digital cameras. Li-ion's high energy density makes it possible to cram more runtime into a compact and rechargeable battery.
Disposable lithium AA or AAA cells sit somewhere in the middle. They cost more than alkaline batteries but are the better option for devices that gobble up alkaline batteries quickly. They're typically best for emergency equipment, outdoor gear, or devices consistently exposed to severe hot or cold weather (-40 to 140 degrees Fahrenheit).
It's not always appropriate to consider battery type in terms of upgrade performance. If a device specifically calls for alkaline cells, only use a lithium alternative if the manufacturer says it's compatible. Don't try to finagle alkaline batteries into a lithium-ion battery pack or try to charge disposable alkaline or lithium cells. Doing so can cause overheating or potential fires.
Lithium-ion is the popular choice for devices that require frequent recharging, like the device you're probably reading this on, laptops, cordless power tools, and digital cameras. Li-ion's high energy density makes it possible to cram more runtime into a compact and rechargeable battery.
Disposable lithium AA or AAA cells sit somewhere in the middle. They cost more than alkaline batteries but are the better option for devices that gobble up alkaline batteries quickly. They're typically best for emergency equipment, outdoor gear, or devices consistently exposed to severe hot or cold weather (-40 to 140 degrees Fahrenheit).
It's not always appropriate to consider battery type in terms of upgrade performance. If a device specifically calls for alkaline cells, only use a lithium alternative if the manufacturer says it's compatible. Don't try to finagle alkaline batteries into a lithium-ion battery pack or try to charge disposable alkaline or lithium cells. Doing so can cause overheating or potential fires.