CR1632 Batteries: What You Need To Know Before Buying This Coin Cell

If you use a small device like a digital watch, garage door opener or even a remote control, you may have noticed that it’s powered by a tiny, disk-shaped battery. That tiny cell may be a CR1632.

In the past, they contained harmful metals such as silver and mercury. Nowadays, they’re made using lithium as the negative material and manganese dioxide as the positive material. Consequently, they can also be referred to as coin type lithium manganese dioxide batteries.

So, what’s the meaning of the letters and numbers in the coin battery label ‘CR1632’?

  • C: Denotes that the battery chemistry is lithium
  • R: This means that the battery has a round shape
  • 16: The two numbers immediately following the letters CR mean that the battery has a diameter of 16 millimetres
  • 32: The last two numbers denote the thickness, which in this case is 3.2 millimetres

Technical Specifications

This battery has the following characteristics:

Type Coin/ button cell
Chemistry/ Composition Lithium
Voltage 3V
Diameter 16mm
Thickness 3.2mm
Capacity Approx. 130 mAh
Operating temperature Approx. -30°C to 60°C
Shelf life Approx. 10 years
Self-discharge Approx. 1% per year when stored under normal temperature and humidity