5500mAh 81.4Wh S1 Pro Replacement Battery for Bose S1 Pro - Long

In this review of the 5500mAh 81.4Wh S1 Pro replacement battery, the bottom line is simple: this pack is for S1 Pro owners who need a reliable, higher-capacity swap that installs cleanly and restores long runtime. It is presented as a direct replacement for the original battery models listed for the S1 Pro series and uses lithium-ion cells with built-in protections, so the single biggest reason to buy is the combination of capacity and integrated safety features that let you get more continuous playtime without complicated setup.

Key Features

• Capacity: The 5500mAh 81.4Wh capacity delivers extended runtime compared with many standard packs, letting users run the speaker longer between charges.
• Compatibility: Designed specifically for the S1 Pro series and compatible with listed battery model numbers, it fits the original battery compartment and electrical connections.
• Easy installation: The replacement installs and fits perfectly, making swap-outs straightforward for users who want a quick DIY battery change.
• Cell chemistry: Built with lithium-ion cells to reduce memory effect and provide consistent power over repeated charge cycles.
• Multi-layer protection: Integrated protections for overcharge, overdischarge, overcurrent, overvoltage, overload, overheat, and short circuit improve operational safety.
• Support and warranty: The product includes a 12 month warranty and 24-hour email support for post-purchase help and troubleshooting.

Who It's For

This battery is ideal for professional or hobbyist musicians, mobile DJs, and small venue operators who rely on the S1 Pro speaker for extended gigs and need dependable, longer runtime without frequent recharges. It also suits owners who are comfortable swapping a battery themselves and want improved playtime while maintaining the original form factor.

It is less suitable for users who prefer factory service replacements or who are uncertain about model compatibility; buyers should verify the listed model numbers and dimensions before ordering. Those who never run extended sessions may find the original battery sufficient and can avoid replacement until capacity noticeably drops.

Pros & Cons

Pros

• Higher 5500mAh capacity provides longer continuous operation than many replacements.
• Direct fit for S1 Pro series with easy installation and original-style dimensions.
• Comprehensive built-in protections increase safety during charging and use.
• Includes a 12 month warranty and responsive email support for issues.

Cons

• Initial conditioning is required (use down to about 5% then charge and cycle 3-4 times) which adds setup time before optimal performance.
• Not a factory-branded unit, so some users may prefer OEM service options for replacements.

Specifications

Voltage	14.8V
Capacity	5500mAh
Energy	81.4Wh
Dimensions	147 x 97 x 35mm
Compatible models	078592, 789175-0110, 789175-0100, 789175-0010, 4INR19/66-2
Cell type	Lithium ion
Warranty	12 months

Our Verdict

The 5500mAh 81.4Wh S1 Pro replacement battery is a practical, good-value choice for S1 Pro owners who need noticeably longer runtime and want built-in safety protections. It fits the original battery compartment, is straightforward to install, and comes with a 12 month warranty, making it a sensible aftermarket replacement for most users who confirm model compatibility.

Frequently Asked Questions

Is this battery a direct fit for the S1 Pro speaker?
Yes, it is designed to fit the S1 Pro series and matches the listed compatible model numbers and dimensions for a direct installation.

How should I prepare the battery after first installation?
Use the battery until it is around 5% charged (not 0%), then charge and cycle it 3-4 times to condition the pack for normal performance.

What protections are included in the pack?
The replacement includes overcharge, overdischarge, overcurrent, overvoltage, overload, overheat, and short circuit protection.