Stop using mechanical switches.  They introduce extra connectors and voltage drops.  The Smart-Fly BatShare Plus can use one of our Failsafe Switches (sold separately) to eliminate extra connectors, switch contact failures and voltage drops. 

The Smart-Fly BatShare Plus enables you to use two battery packs to provide redundant power to your airborne system. With the BatShare Plus, your plane can tolerate a single failure (open-circuit, short-circuit, low voltage) in either battery pack or the battery wiring without losing power to the radio system.  The Smart-Fly BatShare Plus continually monitors both battery packs’ voltage. If the packs are equal in voltage it will draw from both packs.  If one pack’s voltage is higher it will draw from that pack until they equalize.  If one pack looses a cell or shorts the BatShare Plus will disable that pack and draw from the good pack. 

We recommend both packs have the same capacity and are the same age. In practice, with two good packs, the BatShare Plus draws power from both packs, adding their capacities. So with two 2600mAH packs you have 5200mAH flying time.


You can use the BatShare Plus with our Failsafe Switch or standard switches.  We highly recommend using the Failsafe Switch to alleviate extra connectors and switch contact voltage losses.  The two system batteries plug into the two Futaba 2-wire female input connectors.  The output has 2 standard JR male R/C connectors which go to your receiver.  We highly recommend using both connectors into your receiver. 


Input voltage range of 5.5V to 8.4V

3 Amps/Side Continuous Current (Connector Limited)

15 Amps/Side Peak Current (< 10 sec)

Very Low Voltage Drop:

    < 0.400V @ 3 Amps Each Side

 Input “ON” LED Per Side

Universal Input/Output Connectors

 Failsafe Switch Compatible

Recommended for 60cc or smaller planes (Use the BatShare Deluxe or PowerExpander for larger planes)

Technical Specifications

Input Voltage Range: 5.5V to 8.4V

Battery Compatibility

5S, 6S NiMH/NiCd

2S LiFe (A123)

2S Li-ion/Li-poly

Continuous Current: 3 amps per side (Connector Limited)

Peak Current: 15 amps per side for less than 10 seconds

Voltage Drop: Less than 0.400 volts at 3 amps per side

MOSFET Resistance: < 0.030 ohms @ 3A, 5.5V

                                          < 0.020 ohms @ 3A, 8.4V

Failsafe Switch Input: Signal shorted to ground turns unit off


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BatShare Plus

  • Brand: Smart-Fly
  • Product Code: BS-Plus
  • Availability: In Stock
  • $34.95

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