I am using the original rechargeable batteries that comes with the 246, however I'm noticing that they don't really last that long. I had them charged overnight last night, and used the scanner moderately today. It lasted about half the day and then the batteries died. Am I best to replace them with higher quality batteries? I had a similar situation with my digital camera and couldn't really get a resolution until I changed the batteries to rechargeables with a higher mAh rating.