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Coin lithium (CR)

CR927 battery: equivalents & specs

The CR927 is one of the smallest 3 volt lithium coin cells: 9.5 mm across and 2.7 mm tall with about 30 mAh. It shows up in blinking LED novelties, light-up jewelry and a few very small watches, and has no substitute in other chemistries.

CR927 battery drawing: 9.5 mm across, 2.7 mm thick CR927 3V + ⌀ 9.5 mm 2.7 mm
CR927, face and side profile, drawn to scale: 9.5 mm across, 2.7 mm thick.
Voltage
3 V
Size (D×H)
9.5 × 2.7 mm
Chemistry
Lithium manganese dioxide (Li/MnO2)
Capacity
30 mAh

Same battery, other names

Every code below is the exact same cell as CR927. Any of them will fit and work identically.

DL927ECR927

⚠️ 3 V lithium and 1.55 V silver cells share this footprint. A CR927 in a slot meant for an SR927/395 will overdrive and can damage the movement.

Buying and replacement notes

This size is mostly bought in bulk multi-packs for LED projects and novelty gear. Quality varies widely between no-name packs; if a device matters, pay for a Panasonic or Renata cell. Note the odd naming: unlike most CR codes, 927 here means 9.5 mm by 2.7 mm, the same footprint as the silver-oxide SR927 but at double the voltage, so never mix them up in a watch.

Commonly used in

LED throwiesblinking novelty itemssmall LED jewelrysome thin watches

Need a replacement?

Shop CR927 batteries on Amazon →

⚠️ Keep away from children. Swallowed button batteries, especially 20 mm lithium coins, cause severe injury within hours. If a child swallows one, call the 24/7 National Battery Ingestion Hotline (US) at 800-498-8666 or poison control at 800-222-1222 immediately. What every parent should know.

Frequently asked questions

What devices take a CR927?
Mostly LED novelties: throwies, flashing badges, light-up spinners and small jewelry lights, plus a handful of slim watches designed for 3 V. It is rarely a replacement item in mainstream electronics, which is why you mostly find it in hobby multi-packs.
Can a CR927 replace a 395 watch battery?
No. They share the 9.5 x 2.7 mm size, but the CR927 outputs 3 V against the 395's 1.55 V. Fitting the lithium cell in a silver-oxide watch movement will overdrive and likely damage it. Voltage, not just size, must match.
How long does a CR927 last?
Driving a steadily lit LED, only a few hours; blinking circuits stretch that to days. In standby roles it can sit for years, since lithium coin cells self-discharge around 1 percent per year. The 30 mAh rating assumes small continuous drains.

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