The CR1025 is a 3 volt lithium coin cell measuring 10 mm across and 2.5 mm tall, rated about 30 mAh. It powers some older car remotes, compact watches and small medical devices, sitting between the CR927 and CR1216 in the lithium size ladder.
CR1025, face and side profile, drawn to scale: 10 mm across, 2.5 mm thick.
Voltage
3 V
Size (D×H)
10 × 2.5 mm
Chemistry
Lithium manganese dioxide (Li/MnO2)
Capacity
30 mAh
Same battery, other names
Every code below is the exact same cell as CR1025. Any of them will fit and work identically.
DL1025ECR1025BR1025 (wide-temp variant)
Buying and replacement notes
The code tells you the size: 10 mm diameter, 2.5 mm height. Nothing else fits its slot properly; the CR1220 is 2.5 mm wider and the CR1216 both wider and thinner. This is a less common size, so pharmacies may not stock it, but Duracell (DL1025), Energizer and Panasonic all make it and online availability is good.
Commonly used in
older car remotessmall watchesglucose meters (some)electronic tags
⚠️ 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
Is there a substitute for the CR1025?
No true one. The CR1025's 10 x 2.5 mm case is unique among common cells. A CR1220 (12.5 mm) will not fit the recess, and shimming a smaller cell invites contact failures. Order the exact size; every major lithium brand produces it.
What does the 1025 in the name mean?
CR coin cells encode dimensions in their names: the first two digits are the diameter in millimeters and the last two the height in tenths. So 1025 means 10.0 mm across and 2.5 mm tall. The same logic decodes CR2032, CR1616 and the rest of the family.
How long does a CR1025 last in a car remote?
Typically one to two years with everyday clicking. Remotes draw current only while transmitting, so battery life mostly reflects usage frequency. If a fresh cell dies in weeks, a button is likely sticking and keeping the transmitter awake in a pocket or bag.