Would you trust this battery ?

Got the Skeeter out of the garage yesterday, its not been moved all winter. I hooked up a battery charger to the starting battery and let it run about an hour, it showed 75% charge. So I headed to a local lake. It could not turn the motor over.

From about 3 pm to 9 pm, I had a charger on it and before I went to bed I disconnected it. The charger showed about 90% charge.

I put the charger back on this morning and in a few minutes, the full charge light came on. I disconnect. Go back 30 minutes later and put the charger back on again, and get this

 

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