How long will my Dell 0PD19 batteries last?

The lifespan of a 0PD19 laptop batteries will vary considerably with how it is used, how it is maintained and charged, temperature, and other factors.
Does Dell 0PD19 batteries self-discharge when not in use?
All batteries, include 0PD19 laptop batteries, regardless of their chemistry, self-discharge. The rate of self-discharge depends both on the type of laptop battery and the storage temperature the batteries are exposed to. However, for a good estimate, wet flooded deep cycle laptop batteries self-discharge approximately 4% per week at 80°F.