Super capacitor, Non-rechargeable battery, Figure 33 – Sierra Wireless AIRPRIME WISMO218 User Manual
Page 70: Rtc supplied by a gold capacitor, Figure 34, Rtc supplied by a non rechargeable battery
WA_DEV_W218_PTS_002
Rev 006
April 29, 2010
70
Product Technical Specification &
Customer Design Guidelines
Interfaces
3.16.3.1. Super Capacitor
Figure 33.
RTC Supplied by a Gold Capacitor
Estimated range with 0.47 Farad Gold Cap: 25 minutes minimum.
Note:
The Gold Capacitor maximum voltage is 3.9V.
3.16.3.2. Non-Rechargeable Battery
Figure 34.
RTC Supplied by a Non Rechargeable Battery
The diode D1 is mandatory to prevent the non rechargeable battery from being damaged.
Estimated range with 85 mAh battery: 800 hours minimum.