Charging volts using an old Lester charger?

[custom1106]

I've been messing with my new to me '81 G1 recently that came with an old Lester 8714 timed charger. In my searches around this forum and other websites I see that most automatic chargers turn off when charging voltage gets around 45 or 46 volts...

I've been using a DVM hooked up to the pack while charging and after a while I'm seeing voltage of just over 47 - with about 15 amps still reading on the charger. To me, by the voltage the pack seems charged, but by amps it seems like there's still a ways to go.

Also, I had to replace the DC cord on the charger because the previous owner was rough with it. The replacement cord/end looked to be 12 ga wiring, while to original looks to be 10 ga?

Thanks for any info you guys may have!