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Car key fobs: which battery?

Energizer's guide names these cells for key fobs. It names the cell, not the car. Open the fob and read the code on the old cell: that code is the specification. No owner's manual was used here, so no car make or model is listed.

• SR626SWSilver oxide · 1.55 V · 6.8 × 2.6 mmGuide: key fobs
• SR626WSilver oxide · 1.55 V · 6.8 × 2.6 mmGuide: key fobs
• CR1025Lithium (CR) · 3 V · 10 × 2.5 mmGuide: key fobs
• CR1216Lithium (CR) · 3 V · 12.5 × 1.6 mmGuide: key fobs
• CR1220Lithium (CR) · 3 V · 12.5 × 2 mmGuide: key fobs
• CR1620Lithium (CR) · 3 V · 16 × 2 mmGuide: key fobs
• CR2012Lithium (CR) · 3 V · 20 × 1.2 mmGuide: key fobs
• CR2016Lithium (CR) · 3 V · 20 × 1.6 mmGuide: key fobs
• CR2025Lithium (CR) · 3 V · 20 × 2.5 mmGuide: key fobs
• CR2032Lithium (CR) · 3 V · 20 × 3.2 mmGuide: key fobs
• CR2450Lithium (CR) · 3 V · 24.5 × 5 mmGuide: key fobs
• CR2430Lithium (CR) · 3 V · 24.5 × 3 mmGuide: key fobs
• CR-P2Lithium · 6 V · size: see pageGuide: key fobs
• 2CR5Lithium · 6 V · size: see pageGuide: key fobs
• A23Alkaline · 12 V · 10.3 × 28.5 mmGuide: key fobs
• A27Alkaline · 12 V · 8 × 28.2 mmGuide: key fobs

Source: Energizer battery cross reference guide, Energizer, checked 2026-10-29. The guide pairs a cell with a kind of device. Your model may take a different cell.

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