1S~6S Mini Red LED Voltage Meter

Pros: Small (smaller than others) Price (cheaper than others) Bright enough Number of cells detection + each cell voltage disclosed + total voltage Great device to fast voltage measurement at the field. Recommendation: calculate upfront the 80% voltage of your battery (write that down on top of it) and measure with this device while flying or between flights to ensure safe control.

Cons: No user manual. Easy miss connection to the battery (easy to swap + and - sides)

Other: You will need one or more at the field unless you bring your voltmeter to know for how long you can fly.

Pros: It is a very small, cheap and light gadget. I´d be glad to use it in my products.

Cons: There is no instruction posted with the product. I´m afraid to damage it, when I confuse the pins.

Other: I really need more information than just the technical data. The price is really good, I think and the quality seems good. But as it is only for professionals in this state, I will not be able to use it until somebody helps me out here.

Pros: cheap, very small, you can put it into the motorcycle that doesn't have big space, into dashboard, very clear to read the number. no additional power needed. it's good packing

Cons: no manual, buy 3 and 2 was dead, because of lack of manual... I have to configure my self how to connect . although there is - and + sign but the other pin did not have that Not accurate enough. almost one volt. i compare with my multimeter

Other: not bad for price, good quality enough...you can add to your car or motorcycle for indicating the voltage

Pros: - price - size

Cons: - lack of documentation - "+/-" marks on front size

Other: I would clearly mark "+" and "-" on the front of module (eg. black and red stripe) to avoid wrong connection to battery pack.