DominicBest wrote: ↑Fri Mar 31, 2023 8:43 am
......About five years ago my lawnmower which has a much smaller battery of course had problems. The battery had had it. It would start with jump leads but the battery itself couldn’t even be charged as my modern battery chargers automatically search for the battery voltage then charge at 6v or 12 v as required. The voltage was so low they all insisted that no battery was connected. Amongst these was the Optimate charger/conditioner that I keep attached to one of my cars. It too refused to charge. More by luck than judgement I discovered that if I attached the Optimate to the battery while it was attached to an old 12v battery with jump leads it did operate. The result was some sort of black magic. The Optimate went through its cycle and later indicated that the battery was OK.
Some smart chargers will show no charge to a dead battery if it has less that 7 volts but, left connected, will eventually start charging.
Nonetheless, the battery may have suffered internal damage and should be considered for replacement.
DominicBest wrote: ↑Fri Mar 31, 2023 1:27 pm
I cant see any reason why that charger can’t be left attached. 140 Ah is a pretty impressive beast.
Pretty darn heavy as well. It's a right old lift to get it up & over the fixed part of the demountable hydraulic forks. I had to get a pal to help me as I was thinking I could easily drop it or get a hernia & wasn't wrong.
For anyone interested, that's the reason I didn't fancy taking the old one for a ride to the merchants when a pocket tape measure did the same job.
DominicBest wrote: ↑Fri Mar 31, 2023 8:43 am
......About five years ago my lawnmower which has a much smaller battery of course had problems. The battery had had it. It would start with jump leads but the battery itself couldn’t even be charged as my modern battery chargers automatically search for the battery voltage then charge at 6v or 12 v as required. The voltage was so low they all insisted that no battery was connected. Amongst these was the Optimate charger/conditioner that I keep attached to one of my cars. It too refused to charge. More by luck than judgement I discovered that if I attached the Optimate to the battery while it was attached to an old 12v battery with jump leads it did operate. The result was some sort of black magic. The Optimate went through its cycle and later indicated that the battery was OK.
Some smart chargers will show no charge to a dead battery if it has less that 7 volts but, left connected, will eventually start charging.
Nonetheless, the battery may have suffered internal damage and should be considered for replacement.
Well it’s going strong five years later so I’m not too worried that it might fail one day. It certainly wasn’t going to charge while the battery was showing about 4v, I know, I tried.
LAF could well be right!
Tried to log into my bank and was expecting a code over the phone....phone battery was flat.
Needed to move the digger, which I had not started for about a year..... battery flat. It's a fairly new battery but just ran down because of a load of crystal crap leaked volts down to earth over the battery holding clamps. Used jumpers from the tractor to get the digger moved no problem and took the battery off to charge it up overnight.
Good opportunity to take a photo of the battery data on the lable in case I ever need to get one in the future..... Ipod battery flat.
Bugger.
Owning a vehicle in France, buying and keeping, Insuring, Driving licence issues, etc.