On Sat, 23 Mar 2013 20:42:25 -0400, you wrote:

>Hi all, I have an HP 35s calculator which uses two CR2032 3.0V lithium
>coin cells in parallel.
>
>I want to replace the batteries with a small Li-ion or LiFePO4 and a
>solar panel limited 3.3V or so with a very low Iq LDO regulator.
>
>Is 3.3V a safe input voltage for a calculator that specifies 3.0V
>lithium batteries?

Factory fresh coin cells can be over 3,2v so should be fine, though you can=
 get 3.0v LDO regulators

--=20
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