Hi Chris.
Didn't APU start off one of the donks?
Time
Event
1000:24
Airplane touched down.
1004:10
APU started.
1006:15
Airplane completed turn into parking location.
1006:48
Parking brake set.
1006:52
Engine 1 shut down.
1006:54
Engine 2 shut down.
1021:01
APU battery bus voltage decreased from 32 to 31 volts.
1021:04
APU battery current increased to between 44 and 45 amperes for 4 seconds, indicating current flowing into the battery.
1021:07
APU battery bus voltage decreased to 30 volts.
1021:09
APU battery bus voltage decreased to 29 volts.
1021:10
APU battery bus voltage increased to 31 volts.
I am certain of Boeings claim to have an hours experience for each "Cell". I could look, but am not good in that sort of thing, I am computer marginal.
Put it on hold, I'll try.