Netgear R526 Compatible Battery 3.7V 1450mAh YSQ2010KB001861

Generic R526 / R526A / R536 — 3.7V Li-ion Replacement Battery (YSQ2010KB001861)

This is a 3.7V, 1450mAh Li-ion battery for the Netgear R526, R526A, and R536 mobile hotspots. It replaces OEM part numbers YSQ2010KB001861 and YSQ2010. If your hotspot shuts down unexpectedly, fails to power on, or no longer holds a charge through a normal session, this is the direct swap.

• R526 / R526A / R536 fit: All three models run the same 3.7V cell with an identical footprint — 53.70 × 39.30 × 6.70mm — and share the same connector and BMS handshake. Swapping between these variants does not require a different battery.
• Bench tested on actual hardware: We cycled this cell under combined modem and Wi-Fi load. The BMS held cutoff within spec at both the low-voltage floor and the charge termination ceiling. No phantom shutdowns appeared during the discharge curve.
• Cellular radio heat management: Keep the hotspot on a hard, flat surface during long sessions. When connected devices are at the edge of range, the cellular radio runs at peak output continuously — heat concentrates at the cell and shortens cycle life faster than heavy data throughput alone.

Hotspot disconnecting users mid-session on a new battery

When the R526 is serving the maximum number of connected devices, the combined modem and Wi-Fi radio draw spikes well above the idle current. If the cell voltage sags under that load, the BMS triggers a protective cutoff before the battery percentage reads zero. The hotspot reboots, drops all clients, and reconnects — users see it as a random dropout. A fresh cell with a full charge cycle stabilises the voltage rail under load and eliminates most of these mid-session cuts.

R526 not powering on after sitting unused for several weeks

Li-ion cells self-discharge during storage. If the R526 sat long enough for the cell to drop below roughly 2.5V, the BMS locks out normal charging to protect the cell from damage. The hotspot shows no charge indicator and will not boot. Connect it to the original charger and leave it for 30–60 minutes — most BMS circuits include a trickle pre-charge mode that recovers cells in this range. If the charge LED does not appear within an hour, the original cell has dropped below the recovery threshold and replacement is the next step.