Lenovo K320T Compatible Battery 3.85V 3000mAh LB001

Lenovo K320T / PABY0001CN — 3.85V Li-Polymer Replacement Battery (LB001)

This 3.85V, 3000mAh lithium-polymer battery replaces the OEM LB001 cell in the Lenovo K320T (PABY0001CN) smartphone. It fits directly into the battery bay without modification. Voltage and physical dimensions match the original: 83.60 × 63.25 × 4.50mm.

• K320T / PABY0001CN platform fit: Both model designations share the same PCB layout, battery connector, and BMS handshake protocol. The LB001 cell is the single battery SKU across the full K320T production run — no hardware revision changed the battery bay dimensions or nominal voltage.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the K320T mainboard. The BMS accepted the cell on first connection, charge current stepped up correctly through the CC/CV phases, and the protection circuit tripped as expected at the low-voltage cutoff threshold.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-charge cycle at standard current. The K320T's fuel gauge IC is calibrated to the old cell's discharge curve — giving it one uninterrupted cycle lets it remap the coulomb counter against the new cell before high-current charging begins.

Sudden shutdown at 20–30% on the K320T after a cell swap

This is a voltage cliff problem, not a capacity problem. The K320T's modem and display pull simultaneous high current during active use, and a new cell with an uncalibrated fuel gauge can report 25% remaining while the actual cell voltage drops below the BMS cutoff threshold under load. The phone shuts off even though the percentage shown looks safe. One full discharge-charge cycle recalibrates the coulomb counter — after that, the percentage reading tracks actual cell voltage correctly. If shutdowns persist past two full cycles, check that cell voltage at rest reads above 3.7V before initiating a charge.

K320T not powering on after the replacement battery sat in storage

Li-polymer cells self-discharge in storage, and if the LB001 cell dropped below approximately 2.5V the BMS will have engaged a deep-discharge lockout to prevent cell damage. Plugging in the charger normally shows nothing — the phone won't respond. Connect the device to a wall charger, not a PC USB port, and leave it for 20–30 minutes without pressing the power button. The charge IC trickle-charges the cell at low current until voltage climbs back above the BMS recovery threshold, typically around 2.9–3.0V, at which point normal charging resumes and the phone can power on.