Replacement Battery for Microsoft Zune 80gb 120gb 2nd Gen 850mAH (Battery ONLY)
Quick take
This is a battery-only Li-ion replacement designed specifically for Microsoft Zune 80GB and 120GB (2nd Gen) devices, using an 850mAh, 3.7V cell. It’s a good fit for owners trying to revive a Zune that will not hold a charge or will not power on. The main caveat is installation, because the battery is soldered in, so you should be comfortable with electronics repair or plan to use a technician.
Pros and cons
Pros
- Compatibility aimed at Zune 80GB and 120GB, 2nd Gen models.
- Higher capacity claim than the original 650mAh cell, with this one listed as 850mAh.
- Many buyers report it restores charging and brings non-working Zunes back to use.
- Battery capacity and voltage are specified (850mAh, 3.7V), which helps when sourcing the correct part.
Cons
- Battery-only purchase means you still need the right tools and skills for removal and soldering.
- Some buyers note early “won’t charge” or weak runtime behavior that may improve after cycling or calibration.
What buyers think
Buyer-review evidence supports a generally positive repair outcome, especially when the original problem is a Zune that no longer powers on, will not charge, or will not hold a charge. Several themes show up repeatedly: the battery can restore functionality after installation, charging behavior may require discharge and recharge cycles to reach stable performance, and the most labor-intensive part is opening the Zune and handling the soldered connection. Overall, the reviews suggest the product is a solid option for the right Zune model, but results depend heavily on careful installation and, in some cases, battery cycling after installation.
Who this replacement battery is for
- Zune owners (80GB or 120GB, 2nd Gen) who need a replacement battery to repair a unit that is dead, won’t charge reliably, or drains quickly.
- DIY repairers who can handle a battery that is soldered in, or who have access to someone who can.
- Buyers who want clear electrical specs when sourcing a cell replacement, including the listed 850mAh capacity and 3.7V rating.
Key specs and compatibility notes
- Device compatibility: Microsoft Zune 80GB and 120GB (2nd Gen).
- Battery type: Lithium-ion (rechargeable).
- Listed capacity: 850mAh.
- Listed voltage: 3.7V.
- What’s included: Battery only (no tool).
If your Zune is a different model generation, do not assume compatibility. For a soldered-in battery replacement, using the correct cell specs matters for safe fit and expected charging behavior.
Installation realities (and why they affect performance)
Reviews repeatedly flag the same practical hurdle: opening the Zune can be challenging, and the battery is soldered in. That means the quality of the solder joints, correct alignment, and careful reassembly all influence whether the Zune charges and how consistently it holds power. After installation, some buyers report that the battery may need discharge and fully recharged cycling to settle into more normal runtime behavior.
What this means for you: if you are new to electronics repair, this is the kind of job where a technician may save time and reduce risk.
Pros and cons in plain language
Pros
- Zune-specific replacement intent: targeted at 80GB and 120GB (2nd Gen) models.
- Capacity upgrade path: 850mAh is listed, aiming to improve on the original 650mAh cell.
- Repair success is a common story: multiple reviews describe restored functionality after installation.
- Stable specs for sourcing: 850mAh and 3.7V are clearly stated, which helps confirm you are buying the right part.
Cons
- No tools included: you’ll need the right equipment and comfort with opening the device and soldering.
- Some “weak start” charging behavior may require cycling: a portion of reviews describe initial issues that improved after discharge/recharge or calibration-type steps.
Expected results and realistic runtime expectations
Runtime varies by usage, screen behavior, and how the battery settles after installation, but reviews describe meaningful improvement when the battery is functioning correctly. Some buyers report strong lasting battery life after cycling, while others initially saw poor charging or short runtime before doing discharge/recharge steps that improved the outcome. If your Zune displays a battery warning or the unit will not power on, a correct replacement battery can be part of the fix, but the install quality is often the difference between “works” and “still not right.”
Price and availability
This battery is positioned as a repair part alternative to replacing the entire device, and it is listed at a consumer-friendly price point relative to a full replacement. Availability can change, but it has been shown as in stock at the time of review data capture.
Alternatives to consider
- Have the Zune serviced locally: if you are not comfortable with soldered battery installs, a repair shop can do the swap, which can be worth it for older devices.
- Buy a complete replacement battery kit (if available): if you struggle with finding compatible tools and materials, a kit designed for similar repairs can reduce the “missing parts” friction (not all listings are battery-only).
- Verify battery calibration behavior: if you try a replacement and see weak performance, cycling and calibration steps are often part of getting a new cell to perform normally.
Verdict
Choose this Replacement Battery for Microsoft Zune 80GB/120GB 2nd Gen if your goal is to repair a Zune that is not charging or not holding power, and you have the skills (or help) to install a soldered-in battery. It has a strong track record for bringing Zunes back to life in buyer reports, but expect the process to be more involved than a simple swap, and plan on battery cycling after installation if performance feels off at first.
Want to check current pricing and availability? Buy on Amazon
FAQ
Is this battery compatible with all Zune models?
It is intended for Microsoft Zune 80GB and 120GB (2nd Gen). If your Zune is a different model or generation, compatibility is not something to assume.
Does it come with tools for installation?
No. It is listed as a battery-only replacement, so you’ll need tools and appropriate repair skills to open the device and handle the soldered connection.
What should I do if the Zune still does not charge right after installing?
Some buyers report improved results after discharge and fully recharging cycles (calibration-style steps). If it still will not charge after that, double-check the solder points and seating during reassembly.
How much battery life should I expect?
Runtime depends on usage and how the battery settles after installation. Reviews describe strong improvements after cycling, while early weak performance can sometimes improve once the battery is fully cycled.
What electrical specs are listed for this replacement battery?
The battery is listed as lithium-ion, 850mAh, and 3.7V.
Specifications
| Product Title | Replacement Battery for Microsoft Zune 80gb 120gb 2nd Gen 850mAH Repair Part (Battery ONLY no Tool) |
|---|---|
| Category | Electronics > Computers & Accessories > Tablet Replacement Parts > Batteries |
| Brand | WirelessFinest |
| Manufacturer | WirelessFinest |
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| UPC | 688957659436 |
| Battery Cell Type | Lithium Ion |
| Battery Capacity | 850 Milliampere Hour (mAh) |
| Voltage | 3.7 Volts |
| Reusability | Rechargeable |
| Unit Count | 1.0 Count |
| Battery Weight | 60 Grams |
| Antenna Location | Power Tool |
| Battery Cell Composition | Lithium Ion |
| Recommended Uses For Product | Power Tool |
Available variants
Size
- Battery ONLY no tool
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