A battery-only replacement for Microsoft Zune 80GB and 120GB (2nd Gen) that targets dead or failing units. It uses an 850mAh Li-ion cell (3.7V), and while the install can be fiddly because the battery is soldered, buyers report it can bring a non-working Zune back to life.
This iPad battery replacement kit is designed for 10.2-inch iPad 7th, 8th, and 9th gen models and includes a pre-installed battery adhesive plus a tool bundle to help with an at-home repair. The main tradeoff is that battery replacements are detail-sensitive, and some buyers report issues if the battery is defective or if the install does not go smoothly.