Verizon Jetpack 890L Replacement Battery 3.7V 1500mAh

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

This 3.7V, 1500mAh Li-ion battery replaces the original cell in 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 keep the hotspot running through a full work session.

• Jetpack 890L series compatibility: These models share the same 3.7V single-cell architecture, the same Li3717T42P3h654458 OEM part number, and the same physical connector. The BMS handshake is identical across the 890L lineup, so one cell covers all listed variants.
• Bench tested on actual hardware: We ran this cell in a Jetpack 890L under combined modem and Wi-Fi load with five connected clients. The BMS held stable cutoff thresholds and did not trigger false low-voltage shutdowns under that simultaneous draw.
• Ventilation during extended sessions: Keep the hotspot flat on an open surface — not in a bag or pocket — during long sessions. The cellular radio runs at peak output when signal is weak, generating heat that sits directly against the battery. Trapped heat accelerates cell aging faster than heavy use alone.

Why the Jetpack 890L drops all connected clients mid-session

The 890L drives two separate power draws simultaneously — the LTE modem and the Wi-Fi radio. At maximum client count, the combined current pull can cause a brief voltage sag on an aging or partially depleted cell. The BMS reads that sag as a low-voltage fault and cuts output, dropping every connected device instantly. A fresh cell with intact internal resistance handles that peak draw without triggering the cutoff. If sessions were cutting out near the end of a charge cycle, that is the cause.

Jetpack 890L won't power on after sitting unused for weeks

Li-ion cells self-discharge at roughly 2–3% per month even when switched off. If the 890L sat in a drawer for an extended period, the cell may have dropped below the BMS minimum boot voltage — typically around 3.0V. The device will show nothing when you press the power button because the BMS blocks output to protect the cell. Plug it into the charger and leave it for 20–30 minutes before attempting to power on; most BMS circuits need a trickle-charge cycle to re-initialise before the device will respond.