I have just purchased 2 off, 120 AH AGM Deep Cycle Batteries, from a local supplier in my home town
Bosch BAC12-120RFM
Out of the box they were both showing identical voltage of 12.73 V
Connecting them in parallel with 35 mm square cable, they were charging at 14.27 volts and 11.4 amps, from a 15 amp Projector 240 volt charger set on AGM and 15 amps (My clamp meter is an el cheapo, so there is no guarantee that the numbers are exactly correct)
Fully charged in just over 7 hours, which I will assume is within the ball park, as I was watching the amps decrease over time
When I am not using my vehicle, it is parked in the sun, with 300 watt solar panel on the roof, running through a DC/DC CTEC 250S Dual charger
I will advise if I have any problems down the track, with this brand and type of battery