About this replacement
Nokia 5 / 5 Dual SIM — 3.85V Li-Polymer Replacement Battery (HE336 / HE321)
This is a 3.85V, 2900mAh Li-Polymer replacement battery for the Nokia 5 and Nokia 5 Dual SIM smartphones. It covers all regional variants including TD-LTE and LATAM models. Fits where OEM parts HE336 and HE321 are listed.
- Nokia 5 variant coverage: All Nokia 5 Dual SIM variants — standard, TD-LTE, and LATAM — share the same battery bay dimensions, connector pinout, and BMS communication protocol. One cell fits the full lineup without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Nokia 5 unit. The BMS handshake completed correctly, charge current stepped down as expected near full capacity, and the protection circuit tripped cleanly at the low-voltage threshold.
- Fuel gauge recalibration on first use: After installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before fast charge pushes high current into an uncalibrated cell — preventing early percentage jumps.
Sudden shutdown at 20–30% on the Nokia 5 after a cell swap
The Nokia 5 fuel gauge IC retains the discharge curve of the previous cell in memory. When a new cell with a different internal impedance is installed, the IC misreads the actual state of charge. Under peak loads — mobile data handoff, screen-on burst — the new cell's voltage drops faster than the IC predicts, and the phone shuts down before the displayed percentage reaches zero. One full discharge cycle from 100% to auto-off, then a full charge, resets the coulomb counter against the new cell's actual curve. After that cycle, shutdown behaviour at low charge normalises.
USB fast charge not activating on the first cycle after replacement
On first connection after installation, the Nokia 5 charge IC may negotiate only standard 5V charging rather than the higher voltage fast-charge profile. This happens because the BMS on a new cell defaults to a conservative handshake until it has completed one initialisation cycle with the host device. Plug in using the original Nokia charger and allow the first charge to complete fully at whatever rate the phone accepts. Fast charge negotiation typically activates correctly on subsequent connections once the BMS and charge IC have exchanged a full session.