Bought a Duracell AGM 31 from Sams club a few weeks ago. Charged it up.
Trolled all day Friday, then charged overnight at 6 amps. It still wasn't fully charged Saturday morning (charger showed 50%), but we only fished a few hours Saturday morning.
Put the battery on the charger Saturday evening when I got home and yesterday evening it's still not showing a charge percentage. The charger is running.
I have a Schumacer (?) WalMart charger that has the AGM/Standard/Gel settings and 2, 6, & 10 amps. Verified the charger is working with another battery. I have it on AGM setting and have tried all 3 of the amp settings.
Seems after 24 hours it should register something? Voltmeter shows 13.1 volts