Battery for Roborock S5 S6 S7 and Xiaomi Mijia - Long Life Replacement

In this review of the TQTHL replacement battery, the bottom line is simple: this pack is for owners of compatible Roborock and Xiaomi Mijia first generation robot vacuums who need a higher capacity, safer replacement battery. The reviewer found the 14.4V, 6800mAh lithium polymer pack delivers noticeably longer runtime than many original cells, and the built in smart IC protection helps avoid the common overheating and overcharging worries. Installation is straightforward for the listed S5, S5 Max, S6 and S7 series models, making it a practical, cost conscious swap for users comfortable changing a battery themselves.

Key Features

• Wide Compatibility: Fits Roborock S5, S50, S51, S502, S55, S5 Max, S6, S7 and compatible Xiaomi Mijia first generation robots, so it covers many common replacement needs.
• High Capacity: The 6800mAh capacity provides longer run times between charges compared with older, lower capacity packs, useful for larger homes.
• Smart IC Chip Protection: Built in intelligent circuitry guards against overheating, short circuit, overcharging and over-discharging for safer daily use.
• Certified Cells: Uses lithium polymer cells with CE, FCC, UL, PSE and ROHS certifications, which supports reliable performance and regulatory compliance.
• Efficient Charging: Grade A+ cells allow efficient charge cycles and are rated for up to 1000 high-efficiency charging cycles, extending overall lifespan.
• Customer Support: The seller offers a warranty with timely response and a support team available for replacement or troubleshooting questions.

Who It's For

This battery is ideal for homeowners who already own one of the listed Roborock S5 or S6 series robots or the first generation Mijia vacuum and want to extend runtime without buying a new robot. It suits DIYers who are comfortable watching a replacement video and swapping the pack themselves, as the seller recommends watching instructional material before installation.

It is less suitable for owners of Roborock mop series models or later model families not listed in the compatibility note; buyers should confirm the model number before purchase to avoid a mismatch. Those who prefer factory service replacements may also choose an official channel instead of a third party pack.

Pros & Cons

Pros

• Higher 6800mAh capacity delivers longer cleaning runs between charges.
• Smart IC protection reduces risk of overheating, overcharge and over-discharge.
• Certified lithium polymer cells and Grade A+ construction support longevity and reliable charging cycles.

Cons

• Not compatible with some mop series or unlisted model families, so the buyer must verify model compatibility before ordering.
• May require 3-5 full charge cycles to reach optimal performance, which delays peak runtime for a few uses.

Specifications

Our Verdict

The TQTHL replacement battery is a practical value choice for owners of the supported Roborock and Mijia first generation vacuums who want longer run time and improved safety features. With certified Grade A+ cells, smart IC protection and generous capacity, it delivers reliable performance for larger cleaning jobs and costs less than many official replacements, provided you confirm model compatibility and are comfortable with a user-replaceable pack.

Frequently Asked Questions

Will this battery fit my Roborock S5 Max?
Yes, the pack lists compatibility with S5 Max among other S5 and S6 series models, but you should confirm the model label before purchase.

How long before the battery reaches peak capacity?
The seller notes the battery typically reaches best results after 3-5 full charge cycles, so expect incremental improvements over the first few uses.

Is the battery safe to use in home vacuums?
Yes, it uses certified lithium polymer cells and an intelligent IC chip for protection against overheating, short circuit, overcharge and over-discharge.