Cricket Dream 5G HE403 Compatible Battery 3.87V 4600mAh

Cricket Dream 5G / EC211001 — 3.87V Li-Polymer Replacement Battery (HE403)

This is a 3.87V, 4600mAh (17.8Wh) Li-Polymer replacement battery for the Cricket Dream 5G smartphone (model EC211001). It replaces part number HE403 — the original cell used in this device. Fit this when the original battery no longer holds a useful charge, swells, or fails to power the phone.

• Dream 5G / EC211001 fitment: Both model references share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The HE403 part number covers the full EC211001 production run — no hardware revision splits the compatibility.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Dream 5G platform. The BMS accepted the charge curve without triggering a protection cutoff, and the fuel gauge IC locked onto the new cell's capacity within one full cycle.
• First-cycle fast charge protocol: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the Cricket Dream 5G after a cell swap

The Dream 5G's fuel gauge IC builds its state-of-charge model from the original cell's voltage-versus-capacity curve. A new cell has a slightly different curve, so the IC underestimates remaining capacity at low charge states. When the modem fires a 5G transmission burst or the screen peaks in brightness, current draw spikes and cell voltage drops sharply — the IC reads this as a hard cutoff and the phone shuts down. One full discharge-charge cycle at standard rate corrects the IC's internal model. After calibration, voltage readings at the 20–30% range stabilise and shutdowns stop.

USB-PD fast charge not accepted on the first cycle after replacement

After fitting a new HE403 cell, some users find the phone charges at slow speed only — the fast charge icon never appears. The charge IC uses a BMS handshake to confirm cell state before allowing high-current USB-PD negotiation; on a fresh cell with no charge history, it defaults to a low-current trickle until the first full cycle completes. This is not a fault. Run one full standard-rate charge to 100% and discharge below 15%, then reconnect the fast charger. The USB-PD handshake re-establishes at that point and fast charging resumes normally.