ZTE Grand Memo Li3832T43P3h965844 Compatible Battery 3.8V 3200mAh

ZTE Grand Memo / N5 Series — 3.8V Li-Polymer Replacement Battery (Li3832T43P3h965844)

This is a 3.8V, 3200mAh lithium-polymer battery that replaces the original cell in the ZTE Grand Memo, V9815, U9815, N5, and compatible variants. Capacity is 12.16Wh. It matches the OEM footprint at 95.58 × 57.15 × 4.16 mm and uses the same connector orientation as the factory cell.

• Grand Memo / N5 platform fit: These models share the same battery bay dimensions, voltage rail, and connector pinout. The BMS in each device handshakes against the same 3.8V nominal spec, so one cell covers the full compatibility list without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Grand Memo platform. The BMS accepted the cell without error flags, charge current ramped correctly through CC/CV stages, and cutoff triggered cleanly at the low-voltage threshold.
• Fuel gauge recalibration after install: On first use, disable fast charging and run one complete discharge down to automatic shutoff, then charge uninterrupted to 100%. This gives the fuel gauge IC one full reference cycle against the new cell's discharge curve before high-current charging begins.

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

The Grand Memo's fuel gauge IC stores a discharge curve learned from the original cell. A new cell has a steeper voltage cliff at low charge — the phone sees the voltage drop and interprets it as 0%, triggering an emergency shutdown even though the percentage shown was 20–30%. This is not a fault with the replacement cell. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% rewrites the fuel gauge reference. After that cycle, percentage reporting stabilises and early shutdowns stop.

Phone won't power on after the replacement cell sat in storage

Li-polymer cells self-discharge during storage. If the cell voltage dropped below approximately 2.5V per cell, the BMS enters a lockout state to prevent damage and will not allow normal charging current. Connect the phone to a wall charger — not a USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC trickle-charges the cell back above the BMS recovery threshold, typically around 2.8–3.0V, at which point the BMS unlocks and normal charging resumes.