IC Medical IC KEYS, Operating Instructions Manual

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4. Batteries / rechargeable batteries 30
4.2 Use of rechargeable batteries
Rechargeable batteries of the size AA can also be inserted into the
keyboard.
We recommend rechargeable batteries with a low self-discharge. The
LED bar display that displays the battery charge status can possibly
react differently when rechargeable batteries are used as rechargeab-
le batteries have a lower voltage fluctuation compared to batteries.
NOTE! It is not possible to charge the rechargeable batteries via the
USB cable. The rechargeable batteries need to be fully charged in a
charging device envisaged for this purpose.