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Re: [Phys-L] Inference Lab Design

On 2012, Aug 19, , at 07:10, Chuck Britton wrote:

The D-cells should last a lifetime.

Their life or yours?

Aux contraire, there's a reason to remove many primary cells when the device is stored for a long time.

bc lost an ophthalmoscope because .....

p.s. I use secondary cells in devices used infrequently.