Hello Mary Ellen, if my assumption is correct, the PK has a litium-ion battery which is more flexible in use. It can be charged at any time, even if it is not completely low because there's no memory effect. So, I think calibration is not necessary too soon. Greetings Thomas Rauch
- [Braillenote] Question about battery and pk: Thomas Rauch
- [Braillenote] Question about battery and pk: Mary Ellen Earls
- Re: [Braillenote] Question about battery and pk: Richard Ehrler
