About this replacement
SonoScape E2 / E3 / E1 Exp / X1 Series — 14.4V Li-ion Replacement Battery (KL4S2P31B)
This is a 14.4V 6200mAh Li-ion replacement battery for the SonoScape E2, E3, E1 Exp, and X1 portable ultrasound systems. It carries OEM part number KL4S2P31B and slots into the same battery bay as the factory-fitted cell. Total energy is 89.28Wh.
- E2 / E3 / E1 Exp / X1 platform compatibility: These models share a common 14.4V power rail, identical battery bay dimensions, and the same BMS handshake protocol — one cell format covers the full range without modification.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a SonoScape-compatible test rig. The BMS negotiated charge termination correctly, and protection circuits tripped at the expected over-discharge threshold without nuisance cutoffs under imaging load.
- Post-installation self-test protocol: After fitting, allow the device to complete its power-on self-test cycle without interruption. The SonoScape BMS runs a battery verification routine at startup — cutting power during this sequence flags a false battery fault that persists until the next full reboot.
SonoScape E2 not completing boot sequence after battery swap
The E2 runs a multi-stage power-on self-test that includes a BMS handshake before it releases the display and imaging modules. A new cell that has partially self-discharged in storage may sit just above the BMS recovery floor — enough to start the sequence, but not enough to pass the load check embedded mid-boot. The device stalls or reboots at the SonoScape logo. Charge the replacement cell fully before first installation and let the charger reach 100% before inserting — do not install mid-charge.
Charge indicator stalls below 100% on first charge cycle
On a new Li-ion cell, the SonoScape charge IC applies a conservative current limit during the first charge pass. This is normal — the charge controller has no capacity history for the cell and uses a reduced termination threshold. The indicator may stop at 95–98% and the device may report "battery not full." Run one complete charge-discharge cycle and the charge IC recalibrates its termination point. After that cycle, the indicator should reach 100% consistently at approximately 16.8V measured at the pack terminals.