Motorola Droid Bionic 4G LTE Compatible Battery 3.7V 1800mAh

Verizon Bionic 4G LTE — 3.7V Li-ion 1800mAh Replacement Battery

This 3.7V Li-ion cell at 1800mAh replaces the original battery in the Motorola Droid Bionic 4G LTE sold on Verizon's network. It fits the standard battery bay and reconnects to the phone's charge IC and fuel gauge circuit. Swap it in when the original cell no longer holds enough charge to get through daily use.

• Droid Bionic battery bay fit: The Bionic uses a removable back panel and a direct-contact battery connector — no proprietary latch or keyed tab. This cell matches the contact placement and physical footprint of the OEM unit so the cover seats flush without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Droid Bionic unit. The BMS accepted charge without triggering a fault, the fuel gauge IC registered the cell, and the phone held the charge rail steady under simultaneous LTE, display, and GPS load.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing erratic percentage readings from the first day.

Sudden shutdown at 20–30% on the Droid Bionic after a battery swap

The Bionic's LTE modem and display draw sharp current spikes that can pull cell voltage below the BMS cutoff threshold even when the fuel gauge still reads 20–30%. This happens because the fuel gauge IC is still calibrated to the old cell's internal resistance profile. A new cell with a different impedance curve makes the gauge's state-of-charge estimate inaccurate under load. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% — after that cycle the gauge resets its coulomb counter against the new cell.

Phone reports wrong battery percentage after cell swap

The Droid Bionic uses a fuel gauge IC that stores a learned discharge curve from the previous cell. When you install a replacement, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship, so percentage readings jump or stall. The fix is one uninterrupted full discharge followed by a full charge with the phone off or idle — this forces the coulomb counter to re-anchor its zero and full points to the new cell. After that cycle, percentage reporting stabilises at real charge levels.