Google Nexus 5 Compatible Battery 3.8V 2300mAh

Google Nexus 5 / Nexus 5 16GB / Nexus 5 32GB — 3.8V Li-Polymer Replacement Battery

This is a 3.8V, 2300mAh Li-Polymer cell for the Google Nexus 5 smartphone, covering both the 16GB and 32GB storage variants. It replaces the original internal battery when the existing cell has degraded, lost capacity, or fails to hold charge. Physical dimensions are 60.92 × 55.33 × 4.50mm — measure your original before ordering if yours has swollen.

• Nexus 5 16GB and 32GB compatibility: Both storage variants use the same battery bay, connector pinout, and charge IC. The difference is NAND flash storage only — the power system is identical across both, so one cell fits all Nexus 5 units.
• Bench tested on actual hardware: We ran this cell through the Nexus 5 charge IC and confirmed the BMS handshake completes correctly. The protection circuit trips at the expected low-voltage threshold and the charge IC accepts the cell without fault codes.
• Fuel gauge recalibration after swap: On first use after installation, disable fast charging and run one complete discharge-charge cycle before relying on the percentage readout. This lets the fuel gauge IC map the new cell's discharge curve before it reports meaningful data.

Sudden shutdown at 20–30% on the Nexus 5 after a cell swap

This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff — typically below 3.5V under modem or display load — faster than the gauge predicts. The phone cuts out even though the displayed percentage looks safe. One full discharge to actual shutdown followed by a complete charge resets the coulomb counter and eliminates most premature shutdowns.

Phone warm near the battery bay on the first few charges after replacement

A fresh Li-Polymer cell has higher internal impedance than a conditioned one. The charge IC pushes current into higher resistance during early cycles, which generates more heat than usual. This is normal for the first two to three charge cycles and settles as impedance drops. If the device stays warm beyond cycle three or the back becomes hot to the touch, check that the battery connector is fully seated — a partial connection raises contact resistance and compounds the heating.