2Pac Dual Battery System

Product Information
20Amp Dual Battery System - New Version, now also has two output leads.
"2 PAC Battery Backer" STD 20 AWG Universal Connectors / WiringDual battery sharing system.Draws evenly on both packs, or runs off single pack if you have a battery failure.Great redundancy for your aircraft.Light weight, Reliable
Low
forward voltage drop (only 600mV @ 20 amps)
Auto Selects pack with highest voltage
Built in noise cancelling circuit >100db
Small size (smallest in market class)
22 GA Heavy duty wires
Li-Po/Li-Ion/Ni-Mh/Ni-Cad Operation
Increased Voltage out compared to other devices
Increased Servo Speed!
Total Weight only 22grams includes leads
Ratings
· Max Input Voltage 10V ( 2-C Li-Po) 10Amp peak per input
· 4 or 5 Cell Operation (Nicad and Ni-Mh)
· 2 Cell Li-Po Packs must be used with Voltage Regulator on output side (See wiring diagram in manual)
User Manual - 2-pac-20amps.pdf
Manufactured by 42Percents Products, USA.

In Summary
The 2Pac Battery Backer allows you to use two battery packs and two switches to provide Dual-Redundant security to your airborne system. With the 2Pac Batt Share, you can tolerate a single failure (open-circuit, short-circuit, low voltage) in either battery pack, or switch, or battery wiring, without losing radio control.
The 2PAC Battery Backer continually monitors both battery packs and switches for the one with the higher voltage, and routes that to your Rx and servos. You may combine different size packs( of same voltage). In practice, with two good packs, the 2PAC draws power equally from both packs, adding their individual capacities. I.e., if Battery #1 is a 6V/1350mAH pack, and Battery #2 is a 6V/2700mAH pack, you will have 4050mAH power supply on board, with at least 1350mAH to fly on, in case of a failure.
Though packs of similar or same capacity are more practical and recommended.
Use two battery packs and two switches to provide Dual-Redundant security to your airborne system