Automatic power guard
 

Automatic power guard
Save your expensive toys with miniature automatic power guard. Based on Schottky diode device choose higher voltage itself from two independent power sources. Device equipped with micro switch to activate backup battery so you do not need plug/unplug cable every single flight. Comes in three backup battery plug versions: with stardard servo connector, with red JST SYP connecor or JST PH 2.0 for 1S LiPo (or LiHV). Wires lenght is 80 mm for power sources and 100 for Rx but you can order any of them as custom so device and its battery can be installed in different locations depending on CG, space availability, etc. without use any extensions.
Price is 15$ (standard wires lenght) plus actual shipping cost: $8 to US in not track able packet, $14 with tracking number. The shipping cost is same for up to 10 devices shipped in single packet so order more than one and save)
Paypal is fine with no fee please (to [email protected]), otherwise add 4.5%

Technical data:
Size - 30x10x8mm
Weight - 7g (with 80mm wires)
V,max - 30
Direct voltage drop - 0.17V max, measured
Voltage switching difference, min - 0.5V