Lithium coin cells often start with the code CR -- followed by the size -- CR1216 is 12mm in diameter and 1.6mm thick.

If the battery of a car remote unlocking system is totally exhausted, memory of the unlock code may be lost. To avoid this -- replace the battery as soon as you notice a reduction in the range at which the remote will work.

Coin cells have a long shelf life of up to 10 yrs and work over a temperature range of -10 to +50°

Do not store coin cells where they can touch other batteries or metal - you may cause a short circuit.

Keep coin cell batteries away from children - risk of swallowing.