On Nov 30 Pat Vilbrandt wrote:
>Most battery manufacturers recommend recharging whenever the battery becomes
>20% discharged to prevent sulphation. So, taking 20% of the above table
>gives:
> 0 deg. C ( 32 deg. F) 1560 days
> 25 deg. C ( 77 deg. F) 200 days
> 50 deg. C (122 deg. F) 36 days
> 70 deg. C (158 deg. F) 8 days (!!)
This is the time it takes for a lead-acid battery to discharge 20% with no
load. Does anyone have data of a similar nature that indicates how much power
a fully charged battery loses as a function of decreasing temperature? This
is kind of the other side of the coin (ie a warm battery starts a car better
than a cold battery).
Olin Kane
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