5 - 15 minutes
Original batter had ceased taking a charge.
The repair took 5 minutes with no issues.
The repair guide is huge in helping you remember what screws go where. I would include in the tools needed a can of Dust off. Was very surprised at the amount of dust and misc unidentifiable crumb like things stuck to the case and all over the mother board. Having to blow them off with my breath not the best practice.