About this replacement
Hisense HS-X6 Series — 3.8V Li-ion Replacement Battery (LI38260)
This is a 3.8V, 2600mAh Li-ion replacement battery for the Hisense HS-X6, HS-X6C, HS-X6T, and X6 smartphones. OEM part number LI38260. It slots into the same battery bay as the original cell and connects to the same charge IC and fuel gauge circuit.
- HS-X6 series compatibility: The HS-X6, HS-X6C, and HS-X6T all run the same 3.8V power rail with an identical connector footprint and BMS handshake. One cell fits all three variants without modification.
- Bench tested on actual hardware: We ran this cell through full charge-discharge cycles on the HS-X6 platform. The BMS accepted the new cell without error flags, and the charge IC stepped through CC/CV phases correctly at both standard and fast-charge current levels.
- Fuel gauge recalibration on first use: After fitting this cell, disable fast charging for the first complete discharge-charge cycle. The fuel gauge IC on the HS-X6 is calibrated to the coulomb curve of the old, degraded cell. Running one full slow cycle lets it recalibrate against the new cell's actual discharge curve before high-current charging is applied.
Sudden shutdown at 20–30% on a fresh HS-X6 cell
This happens because the fuel gauge IC is still running the discharge curve it learned from the worn original cell. The new cell has a steeper voltage cliff at load — when the modem fires a transmission burst or the screen peaks, voltage drops sharply below the hardware shutdown threshold even though the reported percentage looks safe. The phone cuts out to protect the SoC, not because the battery is dead. One full slow discharge to 0% and a full recharge to 100% resets the coulomb counter and resolves this. After that cycle, the reported percentage will track the actual cell state accurately.
USB-PD fast charge not engaging on the first cycle after replacement
On a fresh cell swap, the charge IC sometimes defaults to standard 5V/1A charging and refuses to negotiate a higher power contract. This is a protective behaviour — the IC has no learned internal resistance value for the new cell and holds back until it completes one baseline charge profile. Force a full discharge to below 10%, then charge via the original cable and charger without interruption. After that first complete cycle, fast charge negotiation resumes normally at the rated voltage.