Doro PhoneEasy 326 Replacement Battery 3.7V 1050mAh

Doro PhoneEasy 326 Series — 3.7V Li-ion Replacement Battery (EASYUSE 3.7/700)

This is a 3.7V Li-ion battery rated at 1050mAh (3.89Wh), built to replace the original cell in the Doro PhoneEasy 326, PhoneEasy 326GSM, PhoneEasy 328, and HandlePlus 326i. These are senior-focused mobile phones that rely on emergency calling and simplified voice functionality. Correct voltage and capacity come from the product data — 3.7V, 1050mAh.

• PhoneEasy 326 series compatibility: The 326, 326GSM, 328, and HandlePlus 326i share the same battery bay dimensions (72.68 × 43.86 × 5.18mm), voltage rail, and connector orientation. All four accept the same OEM part references — EASYUSE 3.7/700, DBK-700, and XWD081206UL00459.
• Bench tested on actual hardware: We cycled this cell through a full discharge-to-charge sequence and confirmed the BMS communicates correctly with the charge IC. The protection circuit trips appropriately at low-voltage cutoff and releases cleanly on reconnection.
• Fuel gauge recalibration on first cycle: After fitting this battery, run the phone down to auto-shutdown once before charging it back to 100%. The fuel gauge IC is still calibrated to the old cell's discharge curve — one full cycle resets the coulomb counter reference so percentage readings track accurately.

Sudden shutdown at 20–30% on the Doro PhoneEasy 326

This happens when the fuel gauge IC reports a percentage based on the degraded original cell's curve, but the new cell has a different discharge profile. The phone's power management reads 25% remaining while the actual cell voltage has already dropped below the modem's minimum operating threshold. Under the brief current spike of a call or network search, voltage sags just enough to trigger emergency shutdown. One full discharge-charge cycle corrects the IC's reference and stops false cutoffs.

Phone not powering on after the battery sat in storage

Li-ion cells self-discharge during storage. If the cell drops below approximately 2.5V, the BMS latches into lockout mode to prevent damage — the phone will show no response at all, not even a charge indicator. Connect the phone to a wall charger (not a USB port) and leave it untouched for 20–30 minutes. The charge IC trickle-charges the cell at low current until voltage climbs above the BMS re-enable threshold, typically around 2.9V, at which point normal charging resumes.