have had these batts in some gxt1000vp4s for a few years now. mainly only used during hunting season.
is there any test i can do, or have a battery shop do that will tell me how the batteries are performing?
Load tests, peak V at charge, or something else that will say when they have to be replaced?
The best way to tell is to charge them up and use them for a day. If you can transmit in several ten to twenty second intervals without a significant loss of power or battery drain, they are probably fine. However, if the battery level drops considerably after one or two short transmissions or if the power cuts out completely, then it is time to replace the battery.
For more information, read Help please, PTT button switches off radio.