About a year and a half ago we purchased 5 Line Six XD75 Transmitters and matching receivers. We have been happy with them-really like the feature that allows me to "lock" the transmitter on so a vocalist can't shut it off on me. They have a battery meter that gives time remaining-obviously a guideline and not a hard timer, my rule of thumb has been anything under 3 hours for 90 min event is a no go. When we first got these, battery life always started at 8 hours-and was usually very accurate. For the last several months this has been erratic-more so on some mics than others. By that I mean starting at 8 hours or maybe 7 hrs 20 min (timers increment at 20 min intervals)-and at times showing little or no time remaining after only 4 to 5 hours. More frequent battery changes are annoying and nickels and dimes do add up, but my main concern is the change in performance. I am starting to lose confidence in a mic lasting through a 3 or 4 hours event. Mic has 2 power settings-all are still set on low power. Batteries have always been Procells or recently Ray-o-Vac Pros due to a supplier having stocking issues-but battery type doesn't seem to affect things-and I have more than one mic that is being erratic. Any thoughts as to what could be affecting things? Anyone else facing similar issues?
What does Line6 say? Don Boomer is pretty good about returning phone calls and emails...
Some years ago I raced radio control cars nationally for a sponsor with some deep pockets. The cars were battery powered and the battery packs were matched cells and more than $100 each. To compete you needed a minimum of 12 packs. The cars were 1/10 scale NASCAR, worth a couple of grand each, and on the right track would run in excess of 80mph. The whole point here is that I learned how to care for rechargeable batteries from experts. The one point that was made over and over was simply this. Run the battery until fully discharged, then when ready to be used, fully charge the battery. All rechargeable batteries will develop a "memory" caused by a crystallization which occurs over time. eventually the cells will only charge to their last highest charge, which in your case is being measured by time.There are specialized pulse chargers available which can fix the problem with a couple of charges and discharges of the battery. I haven't used one in years, but I know they still exist. You might try one on your batteries.
The concern I see is that the behavior of the device appears to have changed. If you were using rechargeable batteries, it could easily be explained that the batteries are wearing out. But since you're using regular batteries, something else has to be the culprit. It could be that the batteries are somehow different now than they were a year ago, but that seems fairly unlikely. That points to something different in the mic itself.It could be that over time, some components inside the mic have deteriorated in some way, thus becoming less power efficient. The other scenario is that the time indicator never really was accurate to begin with, and you're just noticing it now after more careful observation. Calculating remaining time on a battery without knowing the exact make and condition of the battery to start with is at best a guessing game. It's never going to be extremely accurate.
Run the battery until fully discharged, then when ready to be used, fully charge the battery. All rechargeable batteries will develop a "memory" caused by a crystallization which occurs over time. eventually the cells will only charge to their last highest charge, which in your case is being measured by time.
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