Re: 1502 TDR project
Tom Gardner
NiCd cells have a longer shelf life than lithium cells - I believe.
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The 1502/3 has a nasty characteristic - even when turned off there is a current drain of ~1mA through the chart recorder. If left discharging then eventually the weakest cell will discharge first and then be reverse charged - and that's bad news, It is behind the statement that the battery should be fully charged once a month, My solution is simply to remove the battery pack when not in use. Even if each cell self-discharges, it won't be reverse charged. But you should treat that with caution; I'm not a battery expert.
On 10/12/2019, Mark Pilant <mark@n1vqw.net> wrote:
> tabbed C NiCd cells are easily available, so the battery can be
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