NP99sp NewPower99 Battery Kit for Ultimate Ears Megaboom 3 - Long Life

In this review the NP99sp NewPower99 Battery Kit is evaluated as a practical, cost-effective repair option for owners of the Ultimate Ears Megaboom 3 984-001394 speaker. The bottom line: if the original battery in your Megaboom 3 no longer holds charge, this kit is worth considering because it supplies a higher capacity 3400 mAh replacement battery plus the special tools and a step-by-step video that make the swap doable at home. It is aimed at people who want to extend the life of a trusted speaker rather than replace the whole unit.

Key Features

• High capacity battery: The included 3400 mAh rechargeable lithium ion cell provides more runtime than the original 3200 mAh pack for longer playback between charges.
• Step-by-step video: A how-to video walks through the entire disassembly and battery swap so users can confidently follow along and avoid guesswork.
• Free special tools: The kit includes the specific tools needed to open the Megaboom 3 so customers do not need to buy separate equipment.
• Full one year warranty: The battery is covered by a one year money back guarantee when purchased from the seller, offering a safety net for early failures.
• Complete replacement kit: Everything required to perform the replacement arrives in the box, simplifying the repair and reducing downtime.

Who It's For

This kit is best for Megaboom 3 owners who are comfortable following visual instructions and want to restore an existing speaker without paying for professional service or buying a new unit. It suits DIYers, budget-conscious listeners, and anyone who keeps outdoor or travel-ready speakers and prefers to maintain them.

It is not ideal for users who want a factory-authorized service or who are reluctant to open electronic devices; those customers should consider official repair channels or a replacement speaker instead. Also, if the speaker has other unrelated hardware faults, replacing the battery alone will not resolve those issues.

Pros & Cons

Pros

• Higher capacity 3400 mAh battery gives longer run time than the original pack.
• Clear instructional video reduces the chance of mistakes during replacement.
• Included tools mean no extra purchases and a complete, ready-to-use kit.

Cons

• The repair requires opening the speaker, so users uncomfortable with DIY repairs may prefer professional service.

Specifications

Compatible Model	Ultimate Ears Megaboom 3 984-001394
Battery Type	Rechargeable Lithium Ion
Capacity	3400 mAh
Included Items	Battery, special tools, how-to video
Warranty	One year money back guarantee
Purpose	Battery replacement kit

Our Verdict

The NP99sp NewPower99 Battery Kit is a sensible, affordable option for anyone wanting to revive a Megaboom 3 speaker without replacing the entire device. With a higher capacity 3400 mAh cell, included tools, and a clear video guide plus a one year warranty, it delivers good value for DIY repairs while avoiding unnecessary expense.

Frequently Asked Questions

Will this battery improve play time compared to the original?
The replacement battery is 3400 mAh versus the original 3200 mAh, so users should see longer runtime per charge.

Are tools included to open the speaker?
Yes, the kit ships with the special tools required and a how-to video to guide the installation.

What warranty is provided?
The seller offers a one year money back guarantee for the battery when purchased from them.