The battery probably lost its capacity in 3-4 years since release.
If only things could be made so parts that wear out can be swapped at a repair shop...
More seriously: I believe many refurbished resellers do swap a new battery on the higher quality tiers.
If only things could be made so parts that wear out can be swapped at a repair shop...
More seriously: I believe many refurbished resellers do swap a new battery on the higher quality tiers.