[Elecraft] KXBC3 charging schedule for self discharge

[Mike WA8BXN]

I have a set of Maha 2700 mAh NiMH batteries in my KX3. Its used mostly with
a 14.4 V power supply. The instruction sheet for the KXBC3 indicates
batteries typically self discharging 2% per day. What would be a good
charging plan (how often/how many hours) to keep the batteries reasonably
charged and maximize battery life? For example, every 2 weeks for 8 hours?
Once a week for 4 hours?

Thanks for the responses!

73 Mike WA8BXN