Nokia HE365 Replacement Battery 3.85V 2400mAh Li-ion

Nokia 1 Plus (TA-1130 / TA-1123 / TA-1127) — 3.85V Li-ion Replacement Battery (HE365)

This is a 3.85V, 2400mAh (9.24Wh) Li-ion cell replacing the OEM HE365 battery in the Nokia 1 Plus. It fits the TA-1130, TA-1123, and TA-1127 variants. Use it when the original cell swells, fails to hold charge, or drops capacity to the point the phone becomes unusable.

• TA-1130, TA-1123, TA-1127 compatibility: These three Nokia 1 Plus variants share the same motherboard voltage rail and HE365 connector footprint, so one cell fits all. The BMS handshake and charge IC behaviour are identical across the run.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the Nokia 1 Plus platform. The BMS accepted charge current without tripping, and the fuel gauge IC tracked state-of-charge without fault codes.
• First-cycle fuel gauge reset: After installation, disable fast charging and run one complete discharge down to auto-shutdown, then charge to 100% uninterrupted. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before any high-current charging pushes into an uncalibrated state.

Why the Nokia 1 Plus reports wrong battery percentage after a cell swap

The Nokia 1 Plus stores the previous cell's discharge curve in its fuel gauge IC. When a new cell goes in, the IC still references the old curve, so the percentage shown on screen does not match actual charge remaining. This mismatch corrects itself after one full discharge-charge cycle — the IC rewrites its reference curve against real coulomb data. Until that cycle completes, expect the percentage readout to be off by 10–20%.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below what the modem or screen backlight needs under load, even though the fuel gauge still shows charge remaining. The Nokia 1 Plus draws a sharp current spike during LTE handshakes, and a new cell with an uncalibrated fuel gauge will hit the BMS undervoltage cutoff before the percentage reaches zero. After the first full calibration cycle, the shutdown threshold aligns more accurately with actual cell voltage. If shutdowns persist past two full cycles, check that resting cell voltage is at or above 3.7V before powering on.