Rechargeable battery vs Alkaline
In general the lower voltages of rechargeable batteries (1.2 vs 1.5 volts) causes problems in many devices. Some digital camera models are very sensitive to voltage and will not work or only take a few pictures before needing a recharged battery. Have you tried putting fresh alkaline batteries in the failed unit? I have had very good results using zinc/nickel NIZN 1.6 volt rechargeable  batteries. You can buy 4 with an NIZN charger for about $20 dollars online. They are the best batteries for both my cameras and handheld GPS, and I have had good results for years.