Oh yeah I forgot you have a lithium pack don't you? 30Ah won't run an 8 for very long, and bad things happen to the electronics when the battery runs out of jiuce.
Can you borrow a bigger battery and hook it up with jump leads maybe? I've never measured how long an 8 will run with no alternator - only dealt with the aftermath.
Maybe charge the battery, take the belt off and run it for a bit with a voltmeter on the battery and see how long it takes to get down to 12.2 - 12.3V? (or whatever safety not-discharged-to-death voltage it is for lithium)
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