Clear SPOT Mobile Hotspot Compatible Battery 3.7V 3400mAh

Clear SPOT / IMW-C600W / IMW-C610W — 3.7V Li-ion Replacement Battery (884765)

This is a 3.7V, 3400mAh lithium-ion replacement battery for the Clear SPOT, iSPOT 4G, IMW-C600W, and IMW-C610W mobile hotspot devices. It slots into the same bay as the original 884765 cell and restores the hotspot's ability to broadcast a WiFi signal and maintain a cellular data connection. Capacity is sourced from product data: 3400mAh (12.58Wh).

• IMW-C600W and IMW-C610W platform fit: Both the C600W and C610W run the same 3.7V battery rail with an identical connector and BMS handshake profile. The 884765 part number covers the full model range — the internal BMS on each unit recognises the same charge termination voltage, so no firmware mismatch occurs on insertion.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the IMW-C600W platform. The BMS accepted the cell without fault codes, charge termination fired correctly at 4.2V, and low-voltage cutoff triggered at the expected floor before any cell stress occurred.
• Ventilation during extended hotspot sessions: Keep the hotspot on an open surface — not inside a bag or case — during long sessions. The cellular radio runs at maximum output power when connected devices are far away or signal is weak, and heat buildup in an enclosed space accelerates cell wear faster than almost any other use pattern.

Hotspot warm to the touch during extended sessions on a new battery

The IMW-C600W and C610W run two power-hungry radios simultaneously — a cellular modem and a WiFi broadcast chip. When multiple devices are connected and the cellular signal is marginal, both radios push toward maximum output at the same time. That combined draw pulls harder on the 3.7V cell than casual single-device use, raising internal cell temperature. Keep connected device count reasonable and move the hotspot closer to a window in low-signal environments to reduce radio output demand.

SPOT hotspot shows charging but won't boot after sitting unused

After extended storage, the cell voltage can drop below the minimum threshold the BMS requires to authorise a boot sequence — typically under 3.0V for this chemistry. The device may show a charging indicator but still refuse to power on because the BMS is blocking the power rail until voltage climbs back to a safe level. Leave the unit on charge uninterrupted for at least 60 minutes before attempting to power on. If the device still won't boot after that window, check that wall voltage is reaching the charge port — a marginal cable or adapter will slow recovery significantly.