Honor Note 10 Replacement Battery 3.85V 4900mAh Li-Polymer

Honor Note 10 / X30 Max (RVL-AL09 · KKG-AN70) — 3.85V Li-Polymer Replacement Battery

This is a 3.85V, 4900mAh (18.87Wh) lithium-polymer replacement battery for the Honor Note 10, X30 Max, RVL-AL09, and KKG-AN70 smartphones. It fits where the original cell sits and connects via the same flex-cable ribbon connector. Swap it in when the original cell no longer carries enough charge through a full day of use.

• Cross-model fit — Note 10 and X30 Max: Both handsets share the same battery bay dimensions (102.65 × 72.24 × 3.74 mm), the same 3.85V nominal rail, and a compatible BMS communication protocol — which is why one cell covers both platforms.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Note 10 unit. The BMS accepted the charge handshake without fault flags, and cell voltage held within the expected window across the full discharge curve.
• First-cycle fast-charge protocol: On first use after installation, disable Honor SuperCharge for one complete discharge-charge cycle at standard 5V/2A. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

The fuel gauge IC in the Note 10 stores a discharge model built from cycles on the original cell. When a new cell goes in, that stored model is stale — the IC miscalculates remaining capacity and cuts power before the cell is actually empty. The phone shuts down because the software-reported state of charge hits zero, even though cell voltage may still be above 3.5V. One full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the coulomb counter to reset against the new cell's actual curve. After two to three of these cycles, percentage reporting stabilises.

Phone warm near the battery bay on the first few charges

A fresh lithium-polymer cell has higher internal impedance than a cell that has been through formation cycles. The charge IC pushes current into higher resistance, which generates more heat than you would see with a broken-in cell. This is normal for the first three to five charges and tapers off as the cell cycles down in impedance. If the back of the phone exceeds uncomfortable-to-touch warmth or the charge IC throws a thermal fault — shown as charging paused in the status bar — drop to a 5W charger for that session and let the cell complete the cycle.