Button Coin Cell vs Lithium: Which Battery Lasts Longer
By The Camera Exchange | Published: 2026-10-19
Category: Buying Guides
Compare button coin cell and lithium batteries for cameras. Learn which lasts longer, when to choose CR2032 vs CR2025, and how SR44W and zinc-air options fit your gear.
Quick answer
For most cameras, a lithium coin cell like the CR2032 lasts longer than a standard alkaline button cell, but the right choice depends on your device's voltage requirements and shelf life needs.
Lithium vs Alkaline Chemistry
Lithium coin cells (such as CR2032 and CR2025) have a higher energy density and a much longer shelf life than alkaline button cells. They also perform better in cold temperatures and have a steadier voltage output until they are nearly depleted.
Alkaline button cells are cheaper upfront but lose charge faster while sitting on the shelf. They are more prone to leaking in devices that are used infrequently, which can damage sensitive camera electronics.
CR2032 vs CR2025: Size and Capacity
The CR2032 and CR2025 are both 3V lithium coin cells, but the CR2032 is thicker (3.2 mm vs 2.5 mm) and holds roughly double the capacity (about 225 mAh vs 150 mAh). If your device has a spring-loaded compartment that can accommodate the extra 0.7 mm, the CR2032 will last significantly longer.
The CR2025 is a better fit for slim devices where the CR2032 simply won't close properly. Always check your device's manual for the exact battery model before substituting.
SR44W Silver Oxide vs Lithium Coin Cells
The SR44W (also known as S76 or 357) is a silver oxide button cell, not a lithium cell. It provides a steady 1.55V output, which is ideal for analog cameras and light meters that require precise voltage for accurate exposure readings.
Lithium coin cells like the CR2032 output 3V, which is too high for many vintage cameras. Using the wrong voltage can cause inaccurate meter readings or even damage the circuit. The SR44W is mercury-free and designed as a direct replacement for older mercury batteries.
Zinc-Air Batteries for Specialty Cameras
Zinc-air batteries, such as the Wein MRB625, deliver a stable 1.35V output that matches the original voltage of many vintage camera light meters. They are activated by removing a tab and have a limited life once opened (typically 3-6 months).
Zinc-air cells are not rechargeable and cannot be stored once activated. They are a niche choice for photographers who need exact voltage for classic gear and are willing to replace them regularly.
Trade-offs at a glance
- Lithium CR2032 vs CR2025: Choose CR2032 for longer life if your device fits the thicker cell. Choose CR2025 for slim compartments that cannot accommodate the extra thickness.
- Lithium vs Silver Oxide (SR44W): Lithium cells provide higher voltage (3V) and longer shelf life, but they are not drop-in replacements for devices designed for 1.55V silver oxide cells. Silver oxide offers stable voltage for analog cameras. Always check your device's voltage requirement before choosing between lithium and silver oxide.
- Zinc-Air vs All Others: Zinc-air batteries match the 1.35V of vintage mercury cells but have a short active life once opened. They are a specialized choice for classic gear, not for everyday use.
Product facts
- Ansmann CR2025 Lithium Battery: Ansmann CR2025 Lithium Battery — Price Guarantee, Rent Now A reliable 3V lithium option for slim devices that need a CR2025; its Price Guarantee means you pay the lower of the listed or comparison price.
Ansmann CR2025 Lithium Battery - Maxell CR2032 Lithium Battery: Maxell CR2032 Lithium Battery — Price Guarantee, Rent Now A high-capacity 3V lithium coin cell that lasts longer than the CR2025 in compatible devices; the Price Guarantee helps you get it at a competitive price.
Maxell CR2032 Lithium Battery - MAXELL SR44W SILVER (S76 EQUIVALENT) MERCURY FREE BLX5: MAXELL SR44W SILVER (S76 EQUIVALENT) MERCURY FREE BLX5 — Price Guarantee, Rent Now A mercury-free silver oxide battery that delivers the steady 1.55V many analog cameras need, avoiding the voltage mismatch of lithium coin cells.
- Wein MRB625 1.35V Zinc-Air Battery: Wein MRB625 1.35V Zinc-Air Battery — Price Guarantee, Rent Now Provides the exact 1.35V required by vintage camera light meters; ideal for classic gear but has a limited life once the tab is removed.
Which battery fits your camera?
Best for
- Modern digital cameras and devices that accept 3V lithium coin cells — choose CR2032 for longest life.
- Analog cameras and light meters requiring stable 1.55V — choose SR44W silver oxide.
Not for
- Devices that need exact 1.35V vintage mercury replacement — choose zinc-air instead of lithium or silver oxide.
- Slim compartments that cannot fit a CR2032 — choose CR2025 lithium.
