Hobby Roi Battery Monitor 3S

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Hobby King Battery Monitor 3S

Oct 03, 2017

have ordered the battery mnitor 3s for my JR X9103 , i have an old PolyQuest poworing it ! Seems easy to instal and no more Lipos will dye in my radios ! Thanks HobbyKing

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Customer Rated

Oct 04, 2015

detects all/total cells voltage, NOT individual cell, much better to add a diode or 2. detects all/total cells voltage, NOT individual cell, much better to add a diode or 2.

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Certified Buyer Rated

Jul 01, 2015

This is a 'must have' gadget - you may wonder how much energy in the battery remains, set timer on your RC controller, but this thing gives you reall warning when battery is crytical. Recommended!

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Certified Buyer Rated

Jun 23, 2015

timo produto, vale cada centavo! Indispensvel para um avio eltrico.

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Certified Buyer Rated

Sep 22, 2014

Very good alarm for single motors.



I've been testet it on DJI Phantom and Blade 350QX, but its to slow to warn about low cell, due to those 4 motors consuming alot of power.

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Customer Rated

Jun 29, 2014

over priced now, somehow i break my beep noise, i often dont hear them anyway, then i see the red light, scares the hell out of me,

id like to see twin beep alarms so its twice as loud, and dust protection because mine get dusty in rc car and break.

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Certified Buyer Rated

Apr 15, 2014

I do not know why this picture item got in my review, i do not have it or ordered, so no comment. I did ordered a battery monitor 3s but this is not this picture or the item.

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Certified Buyer Rated

Feb 25, 2014

Prosty monitorek napiecia do pakietw 3S, Informuje gdy pakiet roladuje sie do poziomu 9V (czyli 3V na celi, co jest bezpiecznym poziomem azeby nie uszkodzic pakietu. Dolaczone zlacze/gniazdo pozwala monitorowac napiecie na zlaczy balancera.

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Certified Buyer Rated

Jul 15, 2013

the best battery saver you can buy very precise

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Customer Rated

Jun 20, 2013

Mine came with two of the pins on the back IC soldered together. It reported fully charged 3s batteries as empty. After removing the solder between the pins the device functioned correctly.