The battery life is based on 20 presses per day. Most batteries have a 10yr shelf life. The CR2032 capacity has a big range between brands. Duracell is 100mAh while Nanfu is 210mAh capacity. The AAA capacity is 1800mAh and would offer a much longer life. For the Duracell CR2032 (100mAh): At 20 presses per day, the battery would theoretically last about 7.3 years until reaching 50% capacity Effective life is 7.3 years (limited by capacity depletion) For the Nanfu CR2032 (210mAh): Would theoretically last about 15.3 years until reaching 50% capacity Effective life is 10 years (limited by shelf life) For the AAA battery (1800mAh): Would theoretically last over 130 years until reaching 50% capacity Effective life is 10 years (limited by shelf life) This confirms that the effective life would be around 10 years for both the Nanfu CR2032 and AAA batteries due to shelf-life limitations, while the Duracell CR2032 would be limited by its capacity to about 7.3 years.

Rated Battery Life

The battery life is based on 20 presses per day.

Most batteries have a 10yr shelf life.

The CR2032 capacity has a big range between brands. Duracell is 100mAh while Nanfu is 210mAh capacity.

The AAA capacity is 1800mAh and would offer a much longer life.

For the Duracell CR2032 (100mAh):
- At 20 presses per day, the battery would theoretically last about 7.3 years until reaching 50% capacity
- Effective life is 7.3 years (limited by capacity depletion)
For the Nanfu CR2032 (210mAh):
- Would theoretically last about 15.3 years until reaching 50% capacity
- Effective life is 10 years (limited by shelf life)
For the AAA battery (1800mAh):
- Would theoretically last over 130 years until reaching 50% capacity
- Effective life is 10 years (limited by shelf life)

This confirms that the effective life would be around 10 years for both the Nanfu CR2032 and AAA batteries due to shelf-life limitations, while the Duracell CR2032 would be limited by its capacity to about 7.3 years.