I currently have an FT1XD from Yaesu, which was manufactured in 2015 and is now 10 years old. In the past two years, I've started experiencing issues with the battery draining quickly. Even after fully charging it, the battery would completely drain within about two weeks. I also tried a new factory-made battery, but the problem persisted. However, a new UV5R and UVK5 don't have this issue and can hold a charge for a long time. Is this simply due to the aging of the radio itself? Are there any repair options or is it not worth repairing?