CR1220 vs CR1225: 2.0 vs 2.5 mm Height

CR1220 and CR1225 are not the same size: both are 12.5 mm wide, but CR1220 is 2.0 mm high and CR1225 is 2.5 mm high. Matching 3 V lithium chemistry does not make them interchangeable.

Verdict: Same diameter · different height
Confidence: 98%
Reviewed: 2026-10-04

Same diameter · different height

CR1220 and CR1225 are different thicknesses

Both cells are about 12.5 mm in diameter, but their heights are 2 mm and 2.5 mm.

Use the specified height; do not rely on contact spring travel.

Specification	CR1220	CR1225
Dimensions	12.5 × 2 mm	12.5 × 2.5 mm
Nominal voltage	3 V	3 V
Chemistry	Lithium manganese dioxide	Lithium manganese dioxide
Rechargeable	No	No
Typical use	Watches, remotes, sensors	Watches, remotes, sensors

View CR1220 profile View CR1225 profile

About Confidence: this is a fixed score attached to a comparison rule in the catalog. It is not a probability of working, a measured success rate, or device approval. Read the verdict and its reasons; a high score can accompany a non-equivalence verdict.

See the height difference

Energizer drawing envelopes: CR1220 diameter 12.25–12.50 mm, height 1.80–2.00 mm; the historical CR1225 drawing (Form EBC-4114D, marked OBSOLETE) gives diameter 12.20–12.50 mm, height 2.20–2.50 mm. That archived envelope is not a current production commitment. The solid rectangles show nominal dimensions, not tolerance limits. The nearest height endpoints differ by 0.20 mm; this is not a holder clearance. See the two documented holder sketches below.

CR1225 is 0.5 mm taller. Nominal schematic from catalog dimensions, drawn to one scale on both axes. Not life-size; terminal details are omitted.

The manufacturer’s tolerances, terminal design and holder requirements take precedence. This diagram does not establish interchangeability.

Dimension references: Panasonic CR1220 nominal dimensions · Energizer CR1220 tolerance drawing · Energizer CR1225 historical drawing (marked OBSOLETE)

Exact aliases, physical fit and electrical compatibility

CR1220 and CR1225 are not the same size: both are 12.5 mm wide, but CR1220 is 2.0 mm high and CR1225 is 2.5 mm high. Matching 3 V lithium chemistry does not make them interchangeable.

The height difference is 0.5 mm

Panasonic lists its CR1220 at 12.5 mm diameter and 2.0 mm height. Energizer’s CR1225 drawing lists a 12.50 mm maximum diameter and 2.50 mm maximum height. The catalog uses those nominal size envelopes; actual manufacturer tolerances and terminal versions still matter. Both catalog profiles are primary 3 V lithium manganese dioxide coin cells. That shared electrical specification does not correct a holder designed for the other height.

Application boundary

Use the complete code required by the device. A taller CR1225 can prevent the holder from closing correctly; a shorter CR1220 can leave poor contact. Do not bend contacts, stack cells or add spacers to make the wrong height fit. Capacity and runtime depend on the manufacturer and test conditions, so height alone does not establish longer battery life.

Why this verdict

Diameter matches.
Height and capacity envelope differ.

What to verify in the device

Check the original compartment label, the current manual, polarity, terminal style and whether the device explicitly permits a chemistry or rechargeable alternative.

Sources for these profiles

International Electrotechnical Commission — IEC 60086-1:2026 — Primary batteries, general requirements
Primary-battery nomenclature, form, fit, function, terminal and electrochemical-system framework.
International Electrotechnical Commission — IEC 60086-2-2:2026 — Physical and electrical specifications of lithium batteries
Standardized primary-lithium dimensions and electrical specification context.
Energizer — Lithium Coin Handbook and Application Manual
Lithium/manganese-dioxide coin chemistry, voltage, capacity, drain and application behavior.
Energizer — Battery Replacement Guide
Cross-reference codes and manufacturer guidance to replace the same size and type together.
Panasonic Energy — CR1220 primary lithium coin specifications
Manufacturer-specific CR1220 nominal 3 V specification, 12.5 mm diameter and 2.0 mm height; terminal variants remain separate.
Energizer — CR1225 historical engineering drawing, Form EBC-4114D (marked OBSOLETE)
Historical manufacturer drawing marked OBSOLETE, still served at this URL. Its dimensional envelope is a source-reading example, not a current production tolerance commitment, holder approval or device substitution.

Read the tolerances before choosing a holder

Read both cell tolerance envelopes, then compare two identified holder drawings. The original holder sketches show selected external dimensions and contact arrangements; no cell is shown installed and no device fit is approved.

Observe / document	Interpretation	Next check
Energizer CR1220 dimensional drawing	Diameter 12.25–12.50 mm; overall height 1.80–2.00 mm. Drawing also marks a 4.00 mm minimum contact diameter, 0.20 mm maximum reference deflection and 0.03 mm minimum reference gasket/crimp step.	Read the complete terminal profile, not just the nominal 12.5 × 2.0 mm label.
Energizer historical CR1225 drawing — marked OBSOLETE, Form EBC-4114D	Diameter 12.20–12.50 mm; overall height 2.20–2.50 mm. It also marks a 4.00 mm minimum contact diameter, 0.20 mm maximum reference deflection and 0.03 mm minimum reference gasket/crimp step.	The height intervals do not overlap: the closest endpoints differ by 0.20 mm; the nominal difference is 0.50 mm. Neither difference is a holder clearance. This historical drawing is a reading exercise, not a current production tolerance commitment.
Holder A — Harwin S8201-46R, drawing issue 4 (12 April 2022)	Uninsulated SMT retainer; the drawing explicitly lists CR1220 and CR1225. External span 19.00 mm (+0.35/−0.10); dimension A 3.20 ±0.10 mm. The recommended PCB layout includes a separate negative contact pad.	Dimension B is equal to, or up to 0.25 mm below, measured A (note 4). These are drawing dimensions, not an allowable battery-height interval or permission to alter contacts.
Holder B — MPD BHX1-1225-PC, drawing revision H (31 October 2019)	CR1225 retainer with a separate polypropylene insulator; selected outer span 16.40 mm and height above PCB 3.55 mm. The drawing states decimal tolerance ±0.5 mm except as noted.	Use this exact dated drawing and its PCB/negative-pad layout. External dimensions and a 2023 catalog reference to CR1220/CR1225 do not establish complete tolerance fit in a particular device.
Read the drawings before choosing a device replacement	These are two documented holder examples, not the unknown holder in your device. Spring geometry, terminal shape, PCB clearance, polarity, retention and the device specification still matter.	Do not stack cells, add packing, force insertion or bend contacts. If the exact installed holder or device permission is unknown, leave approval unknown.

Limit: Drawings document selected manufacturer examples only. No physical holder or cell has been measured or tested, and no installation is approved. Never stack cells or modify contacts to bridge a height difference.

Sources and scope for this exercise

Energizer CR1220 drawing, Form 1220GL0618 — Complete dimensional envelope and reference terminal callouts for this manufacturer drawing.
Energizer historical CR1225 drawing, Form EBC-4114D (marked OBSOLETE) — Historical manufacturer drawing, undated form, still served at this URL: diameter 12.20–12.50 mm and height 2.20–2.50 mm. The OBSOLETE watermark prevents treating these as a current production commitment.
Harwin S8201-46R technical drawing, issue 4, 12 April 2022 — Manufacturer drawing notes 3/4 and selected single-component dimensions. Original teaching sketch does not reproduce the full manufacturer drawing or authorize manufacture.
MPD BHX1-1225-PC drawing, revision H, 31 October 2019 — Exact retainer/insulator drawing, selected external dimensions, PCB pad layout and tolerance block; no inferred spring travel.
MPD 2023 battery-holder catalog, page 10 — Dated catalog lists BHX1-1225-PC at 12 mm cell diameter and 2.0–2.5 mm height range, with CR1220/CR1225 examples. This catalog shorthand does not replace dimensional tolerance analysis.

Record the removed cell