rechargeable batteries

Hello How can I charge a rechargeable battery in the lab, what's the 'reverse connection'?

Reply to
zooz
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"zooz"

** You use the normal connection - ie positive battery terminal goes to positive terminal of the charger.

But the charger has to have higher voltage available than that of the battery.

Plus, you need to add a resistor in series with the DC supply to limit current flow.

The charging reaction commences immediately and the voltage on the battery can be seen to gradually rise on a sensitive volt meter.

What happens next depends entirly on the kind of battery, its size and the current flow you set up.

...... Phil

Reply to
Phil Allison

i have another question,

-i have to charge two 1.2 v batteries, do i connect them in series and then the free positive terminal to the positive of the charger and so the negative?

-and how do i know the limit of the current?

thaks

Reply to
zooz

"zooz" "Phil Allison"

** No surprise......

** Series is OK.

** Gotta know all about the particular cells for that one !!

The maker's web site usually has the info - or it may be written on the cell's jackets.

...... Phil

Reply to
Phil Allison

WTF. Go and buy a $5 charger from WalMart.

Next question.

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John B
Reply to
John B

What sort of battery (NiCd, NiMh, Lithium, lead-acid, etc)?

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John Devereux
Reply to
John Devereux

I'm wondering if any of those battery chemistries can be safely charged by temperature monitoring.. Assume one doesn't have datasheets and doesn't care about charging damage..(Survivor Man does battery charging... ) I dunno...let's say charging up to an external battery temp of 40C???

D from BC

Reply to
D from BC

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