Hopefully some of you guys can help me out.

Ive been using a radio south battery checker for my Rx packs for approx 5 years and this has worked perfectly, I have recently purchased a ripmax checker the one with 2 green, 2 yellow & 2 red led also a button for applying a load to the battery.

My question is on the checker from ripmax I can be down to the last yellow light without applying the load button, which is saying don't fly because your batteries are to low. However if I then try the radio south checker all greens are lit and is saying its safe to fly.

Can someone advise which is right and what you think is going on here