article_snippet: Philae only had a limited battery supply when Philae landed, lasting just 60 hours before Philae ran out of energy.
article_snippet: By this time, temperatures will almost certainly be sufficient for Philae solar panels to generate enough power for the probe to continue performing experiments on the surface.
article_snippet: Philae’s power system included a non-rechargeable 1,000 watt-hour primary battery and a secondary 140 watt-hour battery, charged by the 24 square feet (2.2 square metres) of solar panels on Philae’s power system exterior .
article_snippet: Ultimately, once the influx of solar rays drops sufficiently, Philae will turn off for good.