About this replacement
Technaxx TX-59 Series — 3.7V Li-Polymer Replacement Battery (TE4630)
This 3.7V, 4000mAh Li-Polymer battery replaces the OEM cell in the Technaxx TX-59, TX-59+, and TX59 Monitor Wireless Door Phone. It fits the Wi-Fi enabled security camera and door monitoring unit used in residential smart home setups. Dimensions are 92.00 × 60.20 × 6.00mm — confirm against your existing cell before installing.
- TX-59 and TX-59+ compatibility: Both variants share the same 3.7V battery bay, connector pinout, and BMS handshake protocol. A single cell covers the full TX-59 lineup without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a TX-59 unit. The BMS accepted the cell cleanly, voltage held steady at 3.7V nominal, and protection circuits for overcharge and over-discharge triggered at expected thresholds.
- Network re-join after power swap: The TX-59 runs a mesh network re-join sequence when power is interrupted. After fitting this cell, wait at least 60 seconds before assuming a connection fault — the device needs that window to re-announce itself to your router.
TX-59 going offline immediately after a battery swap
The TX-59 does not reconnect to Wi-Fi the instant power is restored. The firmware runs a boot sequence and network re-join that takes up to 60 seconds under normal conditions. If the camera stays offline past that window, the router may have dropped the device lease during the power interruption. Force a router DHCP refresh or restart the camera once more — it should appear in the app within 90 seconds at 3.7V nominal charge.
New battery triggers a low-battery alert straight away
Replacement cells ship at storage voltage — typically 3.5V to 3.6V — which sits below the TX-59's alert threshold. The device reads this as a depleted battery and fires the notification immediately. Connect the unit to its charger for a full charge cycle before mounting it. Once the cell reaches 4.2V and the BMS signals full charge, the alert clears and the device reports battery status correctly.