ISDT BattGo BG-8S LCD Display Digital Battery Meter for LiPo/Life/Li-ion/NiMH/Nicd

Works great, must have in your RC toolbox. Very compact too. Dirt cheap for what it can do. Not sure how accurate it is, I guess we would need to compare it or use calibrated equipment to verify it but the batteries I use seem happy with it, they seem properly balanced, I double checked with another device and get the same per cell readings.

I like this meter and use it every time before I go flying to check the voltages of battery packs to match them for parallel charging, and while flying to check how much juice is left after coming down. Works very well for cells from 2S to 8S. 1S works in principle, but you will likely need an adapter to plug your battery into the balance port AND another 2S+ battery to supply power to the unit then. For 2+S packs usage is super simple, just plug the balancing lead into the device and you will get cell voltages displayed almost instantly, very convenient, no need to bother with the XT-60 connector in this case. It can also balance cells and act as an USB power source for e.g. charging your cell phone. I have rarely used the balancing feature, as I always balance charge before flying and a healthy LiPo pack shouldn't be unbalanced after discharging it to 3.8 - 3.75 V (per cell resting) or so anyway. The display is easy to read inside and outside and the user interface is good via three buttons. But again, for its main function of checking cell voltages you won't have to press any of those. I think it is expensive for what it is, but if I lost this one I would get a new one, it's that convenient.

Use with up to 8 cell lipos, gives voltage for each cell and total, plus percentage of power available. Also can balance all cells to lowest. Highly recommended item and seller.

I bought 2 of this product and they work really well, but the other one died after 2 hours balancing the battery, i gotta return it and buy another one. i love this, it will give you live voltages rather than a built in bms nobody knows whats going on inside. i will buy again.

Been using this checker the last 3yrs and no problems. Works great and easy to navigate and use. Probably the best cell checker IMO. Build quality is good. Worth it IMO