TechRestore today announced that they have started offering a new overnight iPod battery upgrade service for 4th generation “click-wheel” iPods and all color screen iPod models. The service includes the replacement of the standard iPod battery with a TechRestore 1000mAh high-capacity battery with over 50% more charging power than the original 4th generation iPod battery and 38% more charging power than the original color iPod battery, according to the company.