Thank you. That's what I was doing but it wasn't working. Turns out my homemade test leads that I was probing were not getting into the little battery grooves very well.
It's also important to note that getting a "good" voltage reading on the battery doesn't really indicate the battery is functioning properly. Batteries should be tested under as normal a load as they would have during there normal operation in the machine/device. A battery can read excellent under no load conditions and then completely peter out when you put a load on it. It can lead to head scratching if you only have a no load voltage reading to work with.
I have 2 Makita batteries that won't charge. I saw a couple videos that show how to "jumpstart" them with another battery by connecting them together ++/--
It doesn't seem to be working though.
I have 2 Makita batteries that won't charge. I saw a couple videos that show how to "jumpstart" them with another battery by connecting them together ++/--
It doesn't seem to be working though.
Yeah that's not going to do anything to help bring back the batteries. Depending on the complexity of the type of battery pack, there isn't much you can do to revive them without replacing the individual cells and/or repairing or replacing the battery management board. You can't "jumpstart" a Li-Ion or Li-polymer battery. You could damage your good battery trying or in the case of Li-polymer you could burn the place down. Better to just replace those dead packs.
I think I've seen the same video. If I recall correctly, the guy says "jumpstart" for lack of a better term. He explained that the charger won't "see" the battery if it's completely drained. So you might have a battery that is still functional but the charger can't "see" it.
I'm way out of my ballpark here, but my layman's understanding is that he put the dead battery into a circuit with a charged battery until it had enough charge to be "seen" by the charger.
You seem to be knowledgeable in this regard. Does that have any merit?
That's probably real good advice! I moved them outside just to be safe.
That could be many things from a bad controller board in the battery to a dead cell.
I'm starting to think the videos might be bunk.
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