Hyperion EOS Sentry Version 3 1-8S HVLI Battery Checker + Balancer + Stor Mode

An indispensable item among all your tools and gadgets. Well built and extremely light. Very easy to operate and easy to navigate through function and displayed information (very intuitive). Reasonably prized as well. I bought two, one for my charging station and another one to carry during trips. Basically, you can't operate Lipo batteries without it.

My aircraft use many types of LIPO batteries (3S,4S,6S). When at the field, it is very important to me to be able to quickly verify the charge on the batteries I use: is the battery fully charged at the beginning of a flight or is there still enough charge for a few minutes more? By using the EOS Sentry, I don't have to guess. With the EOS Sentry 3, I can easily--and quickly--verify the battery charge. This device should be a part of every flyer's toolbox.