The T70 is a high-performance digital dual redundant battery switch with advanced telemetry features and touch switch functionality. It combines a backup battery charging circuit and telemetry with Touch w/LED (Included), optional Sliding, Wireless (R3/RSW), or mechanical switch functionality in a single device.

The T70 is ideal for mid-size models where high-voltage servos are used without voltage stabilization. It provides telemetry and monitors the Voltage/V, Capacity/mAh, and Current/A (Dual Rx Batteries, or BEC w/Backup Battery) of both power inputs.

The T70 is suitable for models equipped either with dual receiver batteries or with an ESC battery eliminator circuit (BEC) used as a primary power source, combined with a small backup battery. The device prefers its primary battery input, while in case of a voltage drop it automatically switches to the secondary input. The charging circuit may be optionally enabled to charge the secondary backup battery from the primary input/BEC.

If using with R3/RSW Wireless Switch you have to change the setting of the T70 from “Touch” to “Standard” setting. For long-term storage, the backup battery has to be disconnected due to the constant load of the R3/RSW Wireless Switch.

The T70 is designed to turn ON/OFF the electronics in your model, it can replace a mechanical switch as well. The device remembers its last operating state, and if the battery is accidentally disconnected, the T70 will automatically boot up again as soon as the battery is connected again.

Specifications and Features

• Intelligent dual battery backer/multiplexer with configurable voltage switchover threshold.
• Touch switch function (Included), Optional Mechanical, Sliding or Wireless (R3/RSW).
• Jeti Duplex EX, Futaba S.Bus2, Multiplex MSB, Graupner Hott, PowerBox telemetry support.
• Optional charging of the secondary/backup battery with capacity protection limits.
• Remembers the last operating state if the battery is accidentally disconnected.
• Two telemetry expansion ports that allow connecting additional Duplex EX/EX Bus sensors.

Continues/Peak Current: 15A/30A (Continues/2 Seconds)
Operational Voltage: 4-12.6V (Recommended 5-8.4V)
Supported Systems: Jeti EX, Multiplex M-LINK, Graupner HoTT, Futaba S.Bus/S.Bus2, PowerBox
Dimensions: 36mm x 19mm x 6mm
Weight: 23g



The T70 generally uses its primary battery input B1 as a main power source. If the B1 voltage drops below the configured Voltage threshold value, it can switch to the B2 input. In such case, the source with higher voltage will be used. As soon as the B1 voltage returns back above the threshold value (+ additional hysteresis), the T70 switches automatically back to B1, no matter the voltage of the B2 input. There are several applications where the user can benefit from the T70.

ESC/Battery Combination: Set the Voltage threshold value below the voltage of the battery eliminator circuit (BEC). In this case, the BEC output will be used exclusively while the secondary input (B2) will act just as a backup battery. Please note that both the ESC BEC and the backup battery must handle the full load of the attached servos.

Equal Dual Battery Discharging: Set the Voltage threshold value above the maximum battery voltage. Both batteries will be discharged equally keeping equal voltage. The batteries have to be of the same chemistry, number of cells, and similar capacity.

Backup Battery Charging: The T70 contains a simple battery charging circuit designed for 2S Li-xx without balancing. The charging may be optionally enabled to keep the backup battery (B2) always ready without the need to remove it from the model (however, we recommend charging the battery with a balancer at least once a month). Several safety conditions are used during the charging (See .pdf manual for details).

More information (links):
* Instruction Manual (pdf.)
* Click Here for Firmware Updates & MAV Manager