This just in: Ebay China electronics prices keep dropping! This 1-8 cell unit will be perfect for building into my new mecanum bot which uses 8 (!) Li-Ions to check each cell voltage. Reads up to 36V. The alarm feature is just icing on the cake.
I have used the 2-6 cell voltmeters previously: http://www.ebay.com/itm/RC-Voltage-Lipo-Battery-Meter-Indicator-2-6-cells-LED-W307-/360599301360?pt=US_Character_Radio_Control_Toys&hash=item53f564acf0
But for 68 cents more, I'm going for it. I have high expectations of this 1-8S meter.