These things would help in my old PM3320A Oscilloscope.
With alkaline batteries, the time doesn't lag behind that much as with NiMH-Accumulators. But I cannot use Alkalines, because the scope actually starts charging the batteries once turned on (had Alkalines in there and it took 2 days of using the scope to make them leak all over the place).
If these Reboost-Thingies are able to let charge-current through, I might actually buy them for my scope. Just because the problem with the timing annoys me.
Or I'll build some kind of LiPo-Solution like I did for my Logic Analyzer
