GTA02 RTC backup battery

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== Replace by capacitor ==
 
== Replace by capacitor ==
RTC backup battery can be replaced by [http://en.wikipedia.org/wiki/Electric_double-layer_capacitor electrochemical double layer capacitor (EDLC)], like XH414H-II06E or EECEN0F204. These supercapacitors have much longer lifetime and they are less sensitive to heat from solder iron than lithium baterries.
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RTC backup battery can be replaced by [http://en.wikipedia.org/wiki/Electric_double-layer_capacitor electrochemical double layer capacitor (EDLC)], like [http://parts.digikey.ca/1/1/1198492-cap-double-layer-elec-07f-3-3v-xh414h-ii06e.html XH414H-II06E (apparently obsolete)] or [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=EECEN0F204 EECEN0F204]. These supercapacitors have much longer lifetime and they are less sensitive to heat from solder iron than lithium baterries.
  
  

Revision as of 19:19, 29 December 2010

RTC keeps the current time while Neo FreeRunner is off or suspended. Rechargable lithium backup battery should keep clocks running for hours when main battery is flat or removed, but it has limited lifetime.

Replace by capacitor

RTC backup battery can be replaced by electrochemical double layer capacitor (EDLC), like XH414H-II06E (apparently obsolete) or EECEN0F204. These supercapacitors have much longer lifetime and they are less sensitive to heat from solder iron than lithium baterries.


Personal tools

RTC keeps the current time while Neo FreeRunner is off or suspended. Rechargable lithium backup battery should keep clocks running for hours when main battery is flat or removed, but it has limited lifetime.

Replace by capacitor

RTC backup battery can be replaced by electrochemical double layer capacitor (EDLC), like XH414H-II06E or EECEN0F204. These supercapacitors have much longer lifetime and they are less sensitive to heat from solder iron than lithium baterries.