Verizon 4G LTE Mobile Hotspot Compatible Battery 3.7V 1750mAh

Verizon 4G LTE Mobile Hotspot / Droid Charge SCH-I510 — 3.7V Li-ion Replacement Battery

This 3.7V, 1750mAh Li-ion cell replaces the original battery in the Verizon 4G LTE Mobile Hotspot and the Droid Charge SCH-I510 series. It fits a range of compatible models sharing the same battery bay dimensions and voltage rail. Capacity is rated at 6.48Wh and comes from the product specification, not estimated from third-party sources.

• Hotspot and Droid Charge platform fit: These models share the same 3.7V single-cell architecture, battery bay footprint (64.50 × 44.00 × 5.00mm), and contact pinout. The cell slots in without any mechanical modification to the housing or connector.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Droid Charge platform and confirmed the BMS handshake completes normally. The protection circuit triggers at the correct undervoltage threshold without false cutoffs during the discharge curve.
• Fuel gauge recalibration on first install: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. The fuel gauge IC on the Droid Charge was calibrated to the old cell's discharge curve — running one full cycle lets it map the new cell before high-current charging begins.

Sudden shutdown at 20–30% on the Droid Charge after a cell swap

The Droid Charge's fuel gauge IC tracks remaining capacity using a coulomb counter calibrated to the original cell's internal resistance profile. A new cell has a different impedance curve, so the gauge underestimates how much voltage drop will occur under LTE modem load. When the modem fires a data burst, the cell voltage sags below the shutdown threshold before the gauge expects it. Run one full discharge cycle without fast charging — the IC resets its reference curve — and the early shutoffs stop.

Hotspot not powering on after sitting in a drawer for months

Li-ion cells self-discharge at roughly 2–3% per month in storage. If the original or replacement cell drops below 2.5V per cell, the BMS trips into lockout mode to prevent damage and will refuse a standard charge attempt. Connect the hotspot to a wall charger — not a USB hub — and leave it for 20–30 minutes without pressing power. Most BMS circuits include a trickle-recovery path that slowly brings cell voltage up to 3.0V before releasing the lockout and allowing normal charging to resume.