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Alkaline and Coin Cell Batteries

Alkaline AA, AAA, C, D and 9V cells, lithium and silver oxide coin cells, and a few rechargeable lithium packs for devices. 190 products from $1.40 to $1,498.99. DURACELL, Unique-Bargains, ENERGIZER and more.

190 products from $1.40

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Chemistry, voltage and code: three things that must match

Voltage is the first filter in this aisle, ahead of chemistry and size: alkaline AA, AAA, C and D cells give 1.5 V and suit remotes, clocks and flashlights. Lithium coin cells such as the 2032 give 3 V, while silver oxide coin cells such as the 377 give 1.5 V, so cells that look alike are not always interchangeable. Read the code on the old cell (CR2032, LR44, 377) or in the manual and buy the same one. Listings also include rechargeable lithium-ion and polymer packs at 3.7 V or 7.4 V; these are made for particular devices and need a matching charger.

Capacity, pack size and shelf life

Capacity in mAh tells you how long a cell runs, but only compare cells of the same chemistry and voltage. Alkaline AA lasts well in low-drain devices such as clocks and remotes; high-drain gadgets like digital cameras suit lithium or rechargeable cells better. Packs run from a single cell to bulk boxes, and cells slowly self-discharge, so only buy as many as you will use before the date printed on the pack. Keep coin cells away from children, because a swallowed button cell can cause serious internal burns.

Questions about Alkaline and Coin Cell Batteries

Can I swap a CR2032 for an LR44?
No. A CR2032 is a 3 V lithium coin cell about 20 mm across, while an LR44 is a 1.5 V alkaline button cell about 11.6 mm across. They differ in voltage and size, so use exactly the type named in the device or its manual.
Can I recharge ordinary alkaline batteries?
No. Standard alkaline cells are not designed to be recharged and may leak or burst if you try. For repeated use choose cells labeled rechargeable, such as NiMH, and a charger made for that chemistry and cell size.
How long do unused batteries stay good?
Alkaline cells typically keep most of their charge for several years in cool, dry conditions, and lithium coin cells often longer. Check the date printed on the pack, and keep spare cells apart from loose metal objects so they cannot short.