Alcatel CAB23V0000C1 One Touch Link Y800 Compatible Battery 3.7V 1750mAh

Alcatel One Touch Link Y800 / Y800Z — 3.7V Li-ion Replacement Battery (CAB23V0000C1)

This 3.7V, 1750mAh (6.48Wh) Li-ion battery replaces the original CAB23V0000C1 cell in the Alcatel One Touch Link Y800 and Y800Z mobile hotspot. It fits the One Touch Y800 and Y800Z variants as well. When the original cell degrades and the hotspot can no longer hold a charge through a full work session, this is the direct swap.

• Y800 and Y800Z compatibility: Both the Y800 and Y800Z use the same 3.7V cell, connector pinout, and BMS communication protocol — one battery covers all variants in this family without modification.
• Bench tested on actual hardware: We cycled this battery through full charge and discharge on the Y800 platform. The BMS accepted charge cleanly, reported accurate state-of-charge to the firmware, and held the modem and Wi-Fi radio active simultaneously without a protection trip.
• Cellular radio heat management: Keep the hotspot in a ventilated spot during long sessions. When connected devices are at range limits, the cellular radio runs at peak output power continuously — this pushes heat directly into the battery cavity and accelerates cell wear over time.

Hotspot disconnecting users mid-session on a new battery

The Y800 draws current from two radios at once — the cellular modem and the Wi-Fi access point. At maximum connected devices, combined draw spikes sharply, causing a momentary voltage sag. If that sag crosses the BMS undervoltage threshold, the battery protection circuit trips and the unit drops off. This is not a faulty battery — it is the BMS doing its job under a heavier-than-usual load pulse. Reduce the number of simultaneous connected devices or move the hotspot closer to the cellular tower to lower modem output power and reduce sag depth.

Y800 won't power on after sitting unused for weeks

Li-ion cells self-discharge during storage. If the Y800 sat long enough, the cell voltage dropped below the minimum boot threshold — typically around 3.0V — and the device cannot initialise. The BMS locks out discharge at this point to prevent cell damage. Connect the hotspot to a charger and leave it for 20–30 minutes before attempting to power on; the charger delivers a trickle current that nudges the cell back above the boot voltage threshold and allows the BMS to re-enable the output.