Battery charger for dead battery
#1
Battery charger for dead battery
I bought a Black & Decker BC15BD battery charger. When my car battery died due to a small light left on, it would not charge it or jump start the car. When I called B&D, I was told that the unit will not charge a completely dead battery. I would like a charger that works on a dead battery. Can you recommend one? Thank you.
#2
More and more of today's battery chargers are called smart chargers. They deliberately don't charge dead batteries to eliminate battery damage or possible explosion.
You need to get a basic 2A/10A non automatic battery charger. You could use one of these basic chargers to precharge the battery and then switch over to your B & D unit.
You need to get a basic 2A/10A non automatic battery charger. You could use one of these basic chargers to precharge the battery and then switch over to your B & D unit.
#3
While I'm not familiar with that battery charger I would think it should charge a dead battery ... but it might not be instantaneous. How long did you leave the charger on the dead battery?
edit,
Just read Pete's response - I wasn't aware of smart chargers
edit,
Just read Pete's response - I wasn't aware of smart chargers

#5
#7
#8
It doesn't need to be all that new for a battery charger to use the so-called "smart" technology. I have a Sears automobile battery charger that is more than twenty years old, (maybe closer to thirty years old) that will not charge a totally dead battery.
If the charger has the feature that causes it to "beep" if you connect the leads incorrectly then it will NOT charge a completely dead battery, even if you leave it connected forever.
If the charger has the feature that causes it to "beep" if you connect the leads incorrectly then it will NOT charge a completely dead battery, even if you leave it connected forever.
#9
It is not recommended to reduce a vehicle battery to below 10 volts as its life will be shortened.
To take it to a few volts or even zero volts will do damage and it might work if you bring it back but will have minimal capacity.
As said, a manual charger may get it to hold a charge but you would do well to just buy a new battery.
To take it to a few volts or even zero volts will do damage and it might work if you bring it back but will have minimal capacity.
As said, a manual charger may get it to hold a charge but you would do well to just buy a new battery.
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