Yes its a Voltwatch meter. I tested it by steadily working the sticks as I don't have a computerized charger. After 10 minutes was on the second light. After 20 it was on the 4th. At 30 it was on the last green light and stayed there for awhile occasionally going down to red when I worked all the servos at the same time. I did it for 50 minutes and there was no noticeable lagging but when I didn't move anything the light would be yellow and when I moved them would flash down to the red. Does it make any difference when theres not a load on the servos like there would be in the air?