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BA_SPHRD_engl_080129 page 22
The integrated batteries have a lifetime of maximally 1000 charging and
discharging processes. For that reason they have to be completely
discharged and afterwards recharged in regular intervals. You can
discharge the accumulator for example by switching on the device
SONAPHONE RD. The device should be switched on until the green
LED will begin to sparkle. Pay attention that the SONAPHONE RD has
an integrated Auto-Power-Off-function which switches off the device
10 minutes after switching on. After that you have to recharge it with the
delivered charger until the red charging control light goes off (see
section "Charging the batteries“).
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