Tongfang GK5CQ7Z Laptop Compatible Battery 15.2V 4000mAh
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Tongfang GK5CQ7Z Laptop Compatible Battery 15.2V 4000mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Tongfang GK5CQ7Z Laptop Compatible Battery 15.2V 4000mAh - is backordered and will ship as soon as it is back in stock.
Voltage
15.2V
Amp
4000mAh
Tongfang GK5CQ7Z / GM7MG0R / UMI Pro Series — 15.2V Li-Polymer Replacement Battery
This 15.2V, 4000mAh (60.8Wh) Li-Polymer battery replaces the internal cell in Tongfang GK5CQ7Z, GM7MG0R, GM7PG0R, and UMI Pro2/Pro3 GM5 laptops. It restores charge capability when the original cell can no longer hold a usable charge. Voltage and connector match the OEM spec on this notebook platform.
- GK5CQ7Z / GM7 / UMI Pro platform fit: These notebooks share a 15.2V four-cell Li-Polymer architecture with the same physical connector and BMS handshake protocol. One replacement cell covers all listed models without modification.
- Bench tested on actual hardware: We ran charge and discharge cycles through a controlled load, monitoring BMS cutoff thresholds. The protection circuit triggered correctly at both over-voltage and under-voltage limits, and charge acceptance matched rated capacity.
- Post-install calibration on GK5CQ7Z: After fitting, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.
Laptop shutting down at 20–30% shown after battery swap
A new cell installed in the GK5CQ7Z can trigger unexpected shutdowns while the OS still shows 20–30% remaining. The fuel gauge IC is still reading curve data calibrated to the old, degraded cell. Under full CPU plus display load, voltage drops faster than the IC expects, and the system hits the hardware cutoff before the gauge catches up. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100% — after that, the gauge tracks the actual cell curve and shutdowns at false percentages stop.
BIOS reporting battery Wh rating as wrong after replacement
Some users see the BIOS report a Wh figure that does not match the 60.8Wh spec on this battery. The BIOS reads Wh from EEPROM data embedded in the cell's protection board, and that value reflects the rated chemistry spec rather than a real-time measurement. This is a firmware display issue, not a capacity fault. Confirm the physical spec is 15.2V × 4000mAh = 60.8Wh — if those values match, the cell is correct and no further action is needed.
Compatible Models
Technical Specifications
Product Highlights
- Brand: Tongfang
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-Polymer
- Battery Type: Li-Polymer
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Tongfang GK5CQ7Z BIOS shows the new battery as "poor health" or "unknown" right after I installed it — is the cell faulty?
The BIOS pulls health data from the EEPROM on the old cell and flags a mismatch when it sees a new one. The cell itself is not faulty. Run the BIOS battery learn cycle: discharge fully to hibernate cutoff, then charge uninterrupted to 100%. After one complete cycle, the BIOS recalibrates against the new cell and the health warning clears.
The fuel gauge on my UMI Pro3 GM5 jumps around wildly for the first few charges — showing 80%, then 45%, then 90% within minutes.
This is normal for the first two to three cycles after fitting a new Li-Polymer cell. The fuel gauge IC uses a stored discharge curve from the old cell to estimate state-of-charge, and the new cell's curve doesn't match yet. Run two full discharge-to-hibernate cycles followed by uninterrupted full charges. The IC recalibrates its curve against the new cell and the gauge stabilises.
My GM7MG0R stops charging at 80% and never goes higher — is the replacement cell the problem?
This is almost always a BIOS-controlled charge limit, not a cell fault. Tongfang and OEM notebooks on this platform include a battery care setting in the BIOS that caps charge at 80% to reduce calendar aging. Enter the BIOS setup utility, locate the battery or power settings menu, and disable the charge limit or set the threshold to 100%. Once changed, the cell will charge to its full 60.8Wh capacity.
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