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TP-Link M7310 Compatible Battery 3.7V 1900mAh TBL55A2000

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Fits TP-Link M7310, M7350 ver 4.0, and M7350 ver 3.20 hotspots, replacing OEM part TBL55A2000.
3.7V, 1900mAh Li-Polymer cell delivers the original capacity for full session runtime on cellular and WiFi simultaneously.
Connector solders directly to the M7310 mainboard with no locking tab — orientation marked on the battery casing.
We bench-tested the cell under combined modem and WiFi load; the BMS held steady voltage throughout the discharge cycle.
On first power-up, keep the hotspot in a well-ventilated area — the cellular radio draws maximum current during poor signal conditions.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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.

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🔹 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.

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⚠️ 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

1900mAh

TP-Link M7310 / M7350 — 3.7V Li-Polymer Replacement Battery (TBL55A2000)

This is a 3.7V, 1900mAh Li-Polymer replacement battery for the TP-Link M7310 and M7350 (ver 3.20 and 4.0) portable mobile hotspots. It uses the original OEM part number TBL55A2000 and fits the same battery bay with no modification. Capacity is 1900mAh / 7.03Wh, matching the factory specification.

  • M7310 and M7350 compatibility: These three models share the same battery footprint, connector pinout, and BMS communication protocol. The TBL55A2000 part number covers all of them. The M7350 ver 3.20 and ver 4.0 both use this exact cell size — 68.20 × 48.30 × 5.60mm — so the fit is consistent across variants.
  • Bench tested on actual hardware: We cycled this battery on an M7310 unit with six connected clients active. The BMS held a stable 3.7V nominal rail under combined modem and Wi-Fi load, and the protection circuit tripped correctly at the low-voltage cutoff threshold without requiring a manual reset.
  • Ventilation during extended sessions: Keep the hotspot flat on a hard surface with airflow around it when running long sessions. The cellular radio pushes maximum output power when connected devices are at range limits, generating heat that accumulates inside a pocket or bag and accelerates cell wear.

Hotspot disconnecting users mid-session on a new battery

The M7310 runs two power-hungry systems simultaneously — the LTE modem and the Wi-Fi radio. At maximum client connections, the combined current draw causes a brief voltage sag on the battery rail. If the BMS interprets that sag as an undervoltage fault, it cuts power to the modem, dropping all connected clients instantly. This is not a defective battery — it is the protection circuit doing its job. Reducing active connected clients or moving the hotspot closer to the cell tower lowers draw and prevents the sag.

M7310 showing a full charge indicator but shutting off after light use

This symptom points to a calibration mismatch between the fuel gauge and the actual cell state. It happens when a battery has been deep-discharged during storage — the cell voltage dropped below the accurate-reading threshold and the gauge lost its reference point. To recalibrate, charge the device uninterrupted to 100% using the original charger, then run it down to auto-shutoff once without interrupting. After one full discharge cycle, the gauge re-anchors to the actual cell capacity and the indicator reading stabilises.

Compatible Models

M7310 M7350 ver 4.0 M7350 ver 3.20

Replaces Part Numbers

TBL55A2000

Technical Specifications

Voltage3.7V
Amp Hours1900mAh
Capacity1900mAh
Rate7.03Wh
Net Weight39g /1.38 oz
Gross Weight64g /2.26 oz
Approximate Weight64g /2.26 oz
Dimension 68.20 x 48.30 x 5.60mm

Product Highlights

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

Frequently Asked Questions

My M7310 hotspot drops all connected devices at the same moment — is this a battery problem or a signal problem?

Most of the time it is both, interacting. Weak signal forces the LTE modem to run at full transmit power, which spikes current draw across the battery rail. If that spike is large enough, the BMS briefly cuts output to protect the cell, and every connected device loses the hotspot simultaneously. Move the hotspot to a window or elevated position to reduce the modem's output demand, and check that no more than four to five devices are connected at once to keep total draw below the sag threshold.

The M7310 battery drains noticeably faster when I am in a low-signal area — why does that happen?

The LTE modem continuously adjusts its transmit power based on signal strength. In a poor-coverage area it runs at maximum output to maintain the connection, drawing significantly more current than it would with a strong signal — sometimes two to three times as much. That extra load chews through the 1900mAh cell much faster than the rated figure suggests. Turning on the hotspot's 4G-only mode and disabling any 5G fallback setting, where available, reduces peak draw and slows the drain.

My M7310 will not power on after sitting in a drawer for several months — is the battery dead?

Probably not dead, but likely below the minimum boot voltage. Li-Polymer cells self-discharge slowly during storage, and if the device sat long enough the cell voltage may have dropped below 3.0V — the threshold the BMS requires to allow a startup sequence. Connect the device to its original charger and leave it for at least 30 to 45 minutes without pressing the power button. Once the cell recovers above 3.2V, the BMS re-enables output and the device will power on normally.

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