'Smart' charger fail.
Neighbor's group 27 truck starting battery was drained dead inadvertently. It's on its final stages anyway as it was jumped 2x in the last month, mostly short trip driven, never plugged in, and is likely 4+ years old.
Raining out, he can't find his charger, I am using my MEanwell rsp-500-15 floating my battery at 13.7v, so I bust out my 10 year old schumacher sc2500a
Its display no longer works, but I have a wattmeter on the output leads to see what it is doing, and press the buttons from memory asking for AGM setting( In attempt to prevent 15+ volts) and the other button 3 times for 25 amps as perhaps the truck might be needed soon.
Voltage was 11.44 on initial hook up, and battery was taking 28 amps from schumacher. Voltage rose to 14.6 quickly, then dropped slowly over 2 minutes to to 13.4v still taking 28 amps, and then started rising slowly. I walked away.
1 hour and 40 minutes later I check on it, 15.79 volts and 13.7 amps, has accepted 42AH. I do not want 15.79 volts. Battery top is still dry around caps.
I unhook charger, turn on head lights, drop battery voltage to 12.6v, restart charger on 12 amp setting turn off headlights. It goes to 14 amps, voltage again climbs to 15.8+ in about a minute, then shuts off, then restarts in float mode. 13.3 v, 1.1 amps.
Restart it again, same irritating result.
Restart it again on 2 amp setting, voltage climbs to 13.45 in a few minutes. Bollocks! I am not leaving this plugged in on the street all night to finish charging it as some piddly 'just fine' voltage. If the battery can accept 14 amps at 15 volts it is NO where near fully charged. no steenking hydrometer needed to determine that.
Screw it, I disconnect my Meanwell adjustable voltage power supply from my electrical cabinet, grab my 8awg alligator clamps with 45 amp anderson powerpoles set voltage to 14.8v, hook it to battery. 10.2 amps.
Should have just done that in the first place and saved a bunch off aggravation.
Now trying to use schumacher to keep my own battery topped up while powering loads, but I cannot get it to hold 13.6 v no matter what I try. I guess 13.2v will have to do until I can retreive my meanwell. My battery monitor is toggling between 13.3 and 13.1v +0.3 amps and will swing to - 2.3 amps before going back up to +0.3 amps.
Stupid 'smart' charger.
I guess their battery was charged enough when schumacher quit for them to drive somewhere to have a new battery installed at autozone or similar, but this is apparently not possible for the owner in the next few days, and his wife needs truck in morning.
Another Smart charger fail.
Hopefully the soon to be fully charged capacity compromised battery will last a while longer untill they have time to get a new one.
Raining out, he can't find his charger, I am using my MEanwell rsp-500-15 floating my battery at 13.7v, so I bust out my 10 year old schumacher sc2500a
Its display no longer works, but I have a wattmeter on the output leads to see what it is doing, and press the buttons from memory asking for AGM setting( In attempt to prevent 15+ volts) and the other button 3 times for 25 amps as perhaps the truck might be needed soon.
Voltage was 11.44 on initial hook up, and battery was taking 28 amps from schumacher. Voltage rose to 14.6 quickly, then dropped slowly over 2 minutes to to 13.4v still taking 28 amps, and then started rising slowly. I walked away.
1 hour and 40 minutes later I check on it, 15.79 volts and 13.7 amps, has accepted 42AH. I do not want 15.79 volts. Battery top is still dry around caps.
I unhook charger, turn on head lights, drop battery voltage to 12.6v, restart charger on 12 amp setting turn off headlights. It goes to 14 amps, voltage again climbs to 15.8+ in about a minute, then shuts off, then restarts in float mode. 13.3 v, 1.1 amps.
Restart it again, same irritating result.
Restart it again on 2 amp setting, voltage climbs to 13.45 in a few minutes. Bollocks! I am not leaving this plugged in on the street all night to finish charging it as some piddly 'just fine' voltage. If the battery can accept 14 amps at 15 volts it is NO where near fully charged. no steenking hydrometer needed to determine that.
Screw it, I disconnect my Meanwell adjustable voltage power supply from my electrical cabinet, grab my 8awg alligator clamps with 45 amp anderson powerpoles set voltage to 14.8v, hook it to battery. 10.2 amps.
Should have just done that in the first place and saved a bunch off aggravation.
Now trying to use schumacher to keep my own battery topped up while powering loads, but I cannot get it to hold 13.6 v no matter what I try. I guess 13.2v will have to do until I can retreive my meanwell. My battery monitor is toggling between 13.3 and 13.1v +0.3 amps and will swing to - 2.3 amps before going back up to +0.3 amps.
Stupid 'smart' charger.
I guess their battery was charged enough when schumacher quit for them to drive somewhere to have a new battery installed at autozone or similar, but this is apparently not possible for the owner in the next few days, and his wife needs truck in morning.
Another Smart charger fail.
Hopefully the soon to be fully charged capacity compromised battery will last a while longer untill they have time to get a new one.
