Verizon Jetpack 890L Replacement Battery 3.7V 1750mAh

Verizon Jetpack 890L — 3.7V Li-ion Replacement Battery (Li3717T42P3h654458)

This is a 3.7V, 1750mAh Li-ion battery for the Verizon Jetpack 890L mobile hotspot. It fits the Jetpack 890L, Jetpack 890L 4G LTE, and Hotspot 890L variants. Swap it in when the original cell no longer holds enough charge to get through a full day of shared mobile internet use.

• Jetpack 890L series fit: All variants in the 890L line share the same battery bay, connector pinout, and BMS communication protocol. The modem and Wi-Fi radio both draw from this single cell, so the BMS must handle combined load spikes — this replacement carries the same charge termination and protection thresholds as the OEM unit.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Jetpack 890L with five simultaneous connected clients. The BMS held cutoff at the correct low-voltage threshold and did not trip under the combined modem-plus-radio draw at maximum connections.
• Ventilation during extended sessions: Keep the hotspot in an open, ventilated spot when using it for long periods. When connected devices are far from the hotspot, the cellular radio runs at maximum transmit power — sustained output raises internal temperature and accelerates cell wear faster than any other use pattern on this device.

Why the Jetpack 890L disconnects users mid-session under maximum load

The 890L runs its LTE modem and Wi-Fi radio simultaneously from a single 3.7V cell. When five clients are connected and signal conditions are poor, both radios ramp to peak draw at the same time. A degraded or partially discharged cell cannot sustain that combined current without voltage sagging below the BMS cutoff threshold, which shuts the device down abruptly. A fresh cell at full charge holds the rail steady through those simultaneous peak draws.

Jetpack 890L won't boot after sitting unused for several weeks

Li-ion cells self-discharge at roughly 2–3% per month even with no load, and the 890L's standby circuitry adds a small continuous drain on top of that. Left long enough, the cell drops below the minimum boot voltage — typically around 3.0V — and the BMS blocks the power-on sequence entirely to prevent damage. Plugging in via USB and leaving it on charge for at least 30 minutes usually recovers the cell enough to boot. If the charge LED does not activate within five minutes of connecting the charger, the cell has likely gone below recoverable voltage and needs replacement.