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Farm Machinery
Workshop Projects
Idiots guide to Milwaukee.....
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<blockquote data-quote="335d" data-source="post: 7424352" data-attributes="member: 13498"><p>Personally I would have sent it back. They don’t charge below a certain voltage for safety reasons. Some chargers will charge batteries at low voltage, but will charge using a very small current. </p><p>In this case, as they are new but old stock, probably all the cells have discharged, so charging them once by external methods is prob ok. The main issue is when one cell starts to degrade, this brings the total voltage down. In this instance they shouldn’t be charged, as the faulty cell will be reverse charged and can affect the chemical composition, resulting in a possible short circuit and inevitable “discharge of energy”. If one must jump start these batteries, it is best to do it with a dc power supply, with a current of approx 10% of the fast charge current. However, most farm workshops won’t have such a power supply. Charging from another battery is not really recommended. It might work 99% of the time, but there is that 1% chance it will end in tears.</p></blockquote><p></p>
[QUOTE="335d, post: 7424352, member: 13498"] Personally I would have sent it back. They don’t charge below a certain voltage for safety reasons. Some chargers will charge batteries at low voltage, but will charge using a very small current. In this case, as they are new but old stock, probably all the cells have discharged, so charging them once by external methods is prob ok. The main issue is when one cell starts to degrade, this brings the total voltage down. In this instance they shouldn’t be charged, as the faulty cell will be reverse charged and can affect the chemical composition, resulting in a possible short circuit and inevitable “discharge of energy”. If one must jump start these batteries, it is best to do it with a dc power supply, with a current of approx 10% of the fast charge current. However, most farm workshops won’t have such a power supply. Charging from another battery is not really recommended. It might work 99% of the time, but there is that 1% chance it will end in tears. [/QUOTE]
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Idiots guide to Milwaukee.....
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