Long story short.
Few days ago, the alternator crapped the bed in my VW, I drove until the battery died. Alternator is out being rebuilt now. I've been charging the battery for over 48hrs and the charging light (amber light) is on steady, on the Battery Tender Plus (1.25amp model). Sticking a meter on the battery terminals, I'm seeing 13.4v, with the charger disconnected, and it is rising at a steady, but slow pace. Surely it has to be at 80% charge by now, which should trigger the green light to turn, indicating a charge of 80%.
Is it normal to see 13.4v on a resting state battery, and it still not be charged (indicated not to be)? I'm still waiting on parts, so I won't be able to test starting the vehicle until next week sometime. I was able to start the vehicle on the side of the road, with a jump pack, but it died within a minute of removing the jump pack.
The battery is an 80ah battery.
There is no load on it, all connections to the vehicle are removed.