Charger question

[Chris Maluszynski]

I just inherited a 36v 10ah battery without a charger. I have a spare charger for another 36v 10ah battery. Charger is 2A. It has a different connector (a male instead of a female xlr)

Can I just change the connector on the charger and make sure red goes to red and be good to go?

Or should I worry about other things that may make the charger incompatible despite the same voltage and battery capacity?





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[Deleted member 4366]

Generally, yes if the charger's voltage is 42.0v. If it's a LiFePO4 battery, the voltage needs to be a bit higher at 43.8v, but you can do a few charges at 42v without any problems.

 

[Chris Maluszynski]

It says voltage is 36v on the charger. Battery says only Li-Polymer


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[Deleted member 4366]

You must measure it if the voltage is uncertain.

 

[Chris Maluszynski]

Well, no, it's clear that the battery is 36V 10ah, and the charger is 36v 2A (for another similar battery that is also 36V 10ah). So unless there may be any other factors to take into account, it should be ok to use the charger from the other battery if I just make sure they are wired correctly?

 

[Deleted member 4366]

Read post #2.

 

[Danidl]

Well, no, it's clear that the battery is 36V 10ah, and the charger is 36v 2A (for another similar battery that is also 36V 10ah). So unless there may be any other factors to take into account, it should be ok to use the charger from the other battery if I just make sure they are wired correctly?

Unless you actually open up the battery pack and read the information on each cell you don't know for sure what technology is being used. They could be , in order of history. Lead acid batteries, three in series, NI cad batteries, banks of 30 in series, NIMH , or any of a few flavours of Li ion .. banks of 10 in series. Maybe even a family of gerbils on a dynamo (unlikely!).
A clue would be the number of electric connections, as NI batteries usually use three. If a li ion charger were used on NI type batteries ,they will die, if a ni charger were used on a li ion pack, it might burst into flames.
Let's assume you have a bog standard li ion pack and a bog standard li ion charger of the wrong sex, then switching the connector will be fine. .. just make sure you get the polarity correct, so that the positive output from the charger, at an off charge voltage of + 42v , connects to the +terminal on the battery pack, which should be reading about +34v before charging and will eventually get close to 42v on full charge. The voltage difference being measured between the two terminals as appropriate.