About this replacement
Kyocera Hydro Elite / C6750 — 3.7V Li-ion Replacement Battery (SCP-53LBPS)
This is a 3.7V Li-ion cell rated at 1500mAh (5.55Wh), built to the SCP-53LBPS specification. It fits the Kyocera Hydro Elite, Hydro Elite 4G LTE, and the C6750 variant. All three share the same battery bay dimensions and connector pinout.
- Hydro Elite, Hydro Elite 4G LTE, and C6750 compatibility: These models use the same 3.7V battery rail, identical connector geometry, and the same BMS communication protocol — one cell covers all three without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the C6750 platform. The BMS accepted the cell on first insertion, charge termination triggered correctly at 4.2V, and the fuel gauge IC tracked state of charge without flagging an incompatible cell error.
- Fuel gauge recalibration on first cycle: After installing this cell, disable any fast-charge setting and run one full discharge-charge cycle before normal use. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve — skipping this step is the most common cause of erratic percentage readings on the Hydro Elite.
Sudden shutdown at 20–30% on the Hydro Elite after a cell swap
The Hydro Elite's fuel gauge IC stores a learned discharge curve from the previous cell. When a new cell goes in, the stored curve no longer matches actual voltage behaviour — the phone calculates remaining capacity against old data. Under modem or display load, the new cell's voltage drops faster than the IC expects, and the phone cuts power before the reported percentage reaches zero. This is a calibration gap, not a faulty cell. One full discharge-charge cycle with no fast charging lets the coulomb counter reset against the new cell. After that cycle, shutdowns at 20–30% stop.
Phone feels warm near the battery compartment on the first charge
A new Li-ion cell has higher internal impedance than a well-cycled one. On the first charge, the charge IC works against that elevated impedance, and more energy converts to heat than usual. This is normal and temporary — internal impedance drops after two or three cycles. If the phone stays warm beyond the first two charges, check that no fast-charge mode is active during break-in. Charging at standard rate (5V/1A) keeps junction temperature within safe limits while the cell conditions itself.