+ Visit NASA.gov + Advanced Search   + About the Server   + Animation List   + How to Use the Server   + RSS Feeds   + Podcasts   + Opportunities Previous Animation Next Animation HST SM4 Battery Module Replacement EVA Battery Modules. The six batteries currently on board the observatory are all original equipment. After more than 17 years of continuous operation the batteries are degrading. In the current condition, the Hubble electrical power system requires careful management of system state of charge to assure adequate power margins for all operational scenarios. This will become more difficult, and will start to constrain operations. The replacement of the two Hubble battery modules (each containing three batteries) will rejuvenate the electrical power system. This, combined with the power system enhancements made in Servicing Mission 3B, will result in ample power margins for the remainder of Hubble's lifetime.    HST SM4 Battery Module Replacement EVA completed and edited animation sequence. Duration: 44.0 seconds Available formats:   512x288 (29.97 fps) MPEG-4   66 MB   320x180     PNG           189 KB   160x80       PNG           45 KB   80x40         PNG           12 KB How to play our movies    Animated sequence depicting the replacement of the batteries during Hubble Space Telescope Servicing Mission 4. Duration: 7.0 seconds Available formats:   320x180     PNG           256 KB   512x288 (30 fps) MPEG-1   7 MB   1920x1080 (60 fps) Frames (Battery Light Dark) How to play our movies    Animated sequence depicting the replacement of the batteries during Hubble Space Telescope Servicing Mission 4. Duration: 4.0 seconds Available formats:   1920x1080 (60 fps) Frames (Door Open)   512x288 (30 fps) MPEG-1   2 MB   320x180     PNG           266 KB How to play our movies    Animated sequence depicting the replacement of the batteries during Hubble Space Telescope Servicing Mission 4. Duration: 7.0 seconds Available formats:   1920x1080 (60 fps) Frames (Cable)   512x288 (30 fps) MPEG-1   5 MB   320x180     PNG           230 KB How to play our movies    Animated sequence depicting the replacement of the batteries during Hubble Space Telescope Servicing Mission 4. Duration: 4.0 seconds Available formats:   1920x1080 (60 fps) Frames (Door Close)   512x288 (30 fps) MPEG-1   6 MB   320x180     PNG           222 KB How to play our movies    Animated sequence depicting the replacement of the batteries during Hubble Space Telescope Servicing Mission 4. Duration: 5.0 seconds Available formats:   1920x1080 (60 fps) Frames (Battery Fly)   512x288 (30 fps) MPEG-1   8 MB   320x180     PNG           256 KB How to play our movies Animation Number: 10231 Completed: 2008-05-11 Animator: Bob Sauls (Frassanito and Associates) (Lead) Producer: Michael D. McClare (HTSI) Series: HST   SM4   Batteries   HST SM4 Animations Keywords: SVS >> Night SVS >> Hubble Space Telescope SVS >> HST SVS >> SM4 SVS >> Servicing Mission 4 SVS >> Batteries SVS >> EVA SVS >> Power System SVS >> Tools SVS >> Connections SVS >> Day     Please give credit for this item to: NASA Goddard Space Flight Center Back to Top + Privacy Policy and Important Notices + Reproduction Guidelines NASA Official: Content Contact: Curator: