Vodafone Mobile Wi-Fi R201 Compatible Battery HB7A1H 3.7V 1450mAh

Vodafone Mobile Wi-Fi R201 — 3.7V Li-ion Replacement Battery (HB7A1H)

This is a 3.7V, 1450mAh Li-ion battery for the Vodafone Mobile Wi-Fi R201 portable hotspot. It replaces part number HB7A1H and fits directly into the R201's battery bay. If your R201 no longer holds a charge or shuts off unexpectedly, this swap restores normal operation.

• R201 platform fit: The R201 runs a combined cellular modem and Wi-Fi radio off a single 3.7V cell. Both draw from the same rail simultaneously, so the battery must match the original voltage and connector spec exactly — a mismatch causes the BMS to reject the pack on boot.
• Bench tested on actual hardware: We ran this pack on the R201 under a five-device Wi-Fi load with the modem active. The BMS cycled correctly through charge and discharge, and the protection circuit tripped cleanly at the low-voltage threshold with no false cutoffs mid-session.
• Ventilation during active sessions: When connected devices are far from the hotspot, the cellular radio pushes to maximum transmit power. Keep the R201 on a flat, open surface — not in a pocket or bag — during extended sessions. Trapped heat accelerates cell degradation faster than cycling does on this battery size.

Why the R201 cuts connected devices mid-session under a new battery

The R201 runs its cellular modem and Wi-Fi radio simultaneously, and peak current draw spikes sharply when several devices transmit at once. On a 1450mAh cell, that combined draw can cause brief voltage sag below the BMS protection threshold, triggering a momentary shutdown. This looks like a signal drop but is actually a battery rail event. Keeping connected device count below the maximum and staying in a strong signal area reduces modem output power and keeps current draw within the cell's stable discharge range.

R201 won't power on after sitting unused for several weeks

Li-ion cells self-discharge at roughly 2–3% per month, and a 1450mAh cell stored in a discharged state can drop below the minimum boot voltage the R201's BMS requires to initialise. The device shows no response — no LED, no startup — because the protection circuit blocks output until the cell reaches approximately 3.0V. Connect the R201 to its charger and leave it for 20–30 minutes before attempting to power on. If the charge LED does not activate within five minutes, the cell has entered deep discharge and may need a full recovery charge cycle before the BMS resets.