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Huawei E5372T Replacement Battery HB5F3H 3.7V 3400mAh

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From $28.99 USD $35.99
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Fits Huawei E5372T, E5775, GL06P, E5377 mobile hotspots — replaces HB5F3H, PB06LPZ10, PBD06LPZ10, HB5F3H-12.
3.7V, 3400mAh lithium-ion cell delivers 12.58Wh — restores full WiFi uptime on the E5372T hotspot.
Connector slides straight into the battery slot with a single locking tab on the left side.
We bench-tested this cell in an E5372T under sustained 4-device WiFi load plus cellular — the BMS held steady voltage output through the full discharge curve.
On first power-up after installation, insert the battery, wait 30 seconds for the firmware to detect it, then power on — the E5372T sometimes needs this detection window before accepting a fresh BMS handshake.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

3400mAh

Huawei E5372T / E5377 Series — 3.7V Li-ion Replacement Battery (HB5F3H)

The HB5F3H is a 3.7V, 3400mAh Li-ion battery for the Huawei E5372T, E5377, E5775, and GL06P mobile hotspot devices. These portable WiFi routers share the same battery bay dimensions and connector, so one part fits the entire platform. Capacity is drawn from product data: 3400mAh / 12.58Wh.

  • E5372T / E5377 platform compatibility: These models run the same Balong modem chipset and use an identical BMS handshake protocol. The battery management circuit expects the same charge termination voltage across all variants, so this cell seats and communicates correctly without firmware conflict.
  • Bench tested on actual hardware: We ran this battery on an E5372T with eight simultaneous client connections. The BMS held charge termination at 4.2V and did not trigger low-voltage cutoff during combined modem and WiFi radio draw at full load.
  • Cellular signal and battery load: In areas with weak LTE signal, the E5372T's radio module ramps to maximum transmit power. Keep the hotspot in a ventilated spot during long sessions — heat buildup at sustained high-power radio output accelerates cell wear faster than anything else this device does.

Why the E5372T drops all connected clients mid-session

The E5372T runs two high-draw subsystems simultaneously: the LTE modem and the dual-band WiFi radio. When battery cell impedance rises — common in aged cells — voltage sags sharply under this combined load. The BMS interprets the voltage dip as a critical low event and shuts the output rail before the display even shows a low-battery warning. A new cell with lower internal resistance holds voltage stable under peak draw and prevents the BMS from tripping incorrectly.

E5372T showing full charge but powering off immediately after removing cable

This happens when a cell has been stored fully discharged for several months. The cell voltage drops below 2.5V and the BMS blocks charge current to protect against lithium plating — the device shows a charge animation off the cable but the cell never recovers enough to sustain load. To attempt recovery, connect the charger and leave it for 45–60 minutes before pressing power. If the device still shuts off instantly when unplugged, the cell is below recovery threshold and needs replacement. A healthy replacement cell will read above 3.6V before first boot.

Compatible Models

E5372T E5775 GL06P E5377 E5377T E5372TS-32

Replaces Part Numbers

HB5F3H PB06LPZ10 PBD06LPZ10 HB5F3H-12

Technical Specifications

Voltage3.7V
Amp Hours3400mAh
Capacity3400mAh
Rate12.58Wh
Net Weight64g /2.26 oz
Gross Weight89g /3.14 oz
Approximate Weight89g /3.14 oz
Dimension 65.38 x 45.85 x 11.00mm

Product Highlights

  • Brand: Huawei
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My E5372T keeps disconnecting everyone on it for a few seconds then reconnects — is this a battery issue?

Yes, and it is one of the most common failures on this platform. When the LTE modem and WiFi radio both peak simultaneously — especially with six or more connected clients — a degraded cell sags below the BMS cutoff threshold, briefly killing the output rail before recovering. The device reboots the radio stack, which looks like a dropout to every connected client. Replacing the cell with a full-capacity 3400mAh unit eliminates the voltage sag that triggers the false cutoff.

Battery drains much faster when I'm in a building with poor signal — is something wrong with the replacement cell?

Nothing is wrong with the cell. The E5372T's LTE radio automatically increases transmit power when signal is weak, trying to maintain a stable connection to the tower. At maximum transmit power, the modem draws significantly more current than in strong-signal conditions, pulling the 3400mAh cell down much faster than the rated capacity suggests. Move the hotspot to a window or elevated position to reduce transmit power demand — that single change cuts current draw more than any software setting.

The E5372T won't power on at all after sitting unused for two months — how do I get it to boot?

Li-ion cells self-discharge at roughly 2–3% per month, and the E5372T's standby current accelerates that further. After two months, the cell may have dropped below the BMS minimum boot voltage of around 3.0V. Connect the charger and wait at least 30 minutes before pressing the power button — do not attempt to boot it immediately. If the charge LED lights solid and the device powers on after that wait, the cell recovered; if it stays dark or shuts off instantly on unplug, the cell has passed the recovery threshold and replacement is the only fix.

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